typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internal

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let json = try JSON(from: string)
    return json
}

func serialize(json: JSON) throws -> String {
    let string = try String(from: json)
    return string
}

func validate(json: JSON) throws -> () {
    // TODO: Implement JSON validation logic here
}

func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let json = try JSON(from: string)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let string = try String(from: json)
    return string
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws -> () {
    // TODO: Implement JSON validation logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

// JSON differ, returns custom error type in case of failures.
func differ(base: JSON, patch: JSON) throws -> [String: Any] {
    // TODO: Implement JSON differ logic here
}

// JSON merger, returns custom error type in case of failures.
func merge(base: JSON, patch: JSON) throws -> JSON {
    // TODO: Implement JSON merge logic here
}

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if let error = error {
        throw error
    }
    return json
}

func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? JSON(json).string
    if let error = error {
        throw error
    }
    return string
}

func validate(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if let error = error {
        throw error
    }
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? JSON(json).string
    if let error = error {
        throw error
    }
    return string
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error = error {
        throw error
    }
}

// JSON loader, returns custom error type in case of failures.
func load(json: JSON) throws {
    let error: ParsingError? = nil
    if let error

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let result: JSON = try JSON(JSONDeserializer.deserialize(string: string, error: &error))
    if error != nil {
        switch error {
            case ParsingError.invalidInput:
                throw ParsingError.invalidInput
            default:
                throw ParsingError.internalError(error)
        }
    }
    return result
}

func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let result: String = try JSON(json).serialize(error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
    return result
}

func deserialize(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let result: JSON = try JSON(JSONDeserializer.deserialize(string: string, error: &error))
    if error != nil {
        throw ParsingError.internalError(error)
    }
    return result
}

func validate(json: JSON) throws {
    let error: ParsingError? = nil
    try JSON(json).validate(error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

func validate(string: String) throws {
    let error: ParsingError? = nil
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

func validate(json: JSON, path: String) throws {
    let error: ParsingError? = nil
    try JSON(json).validate(path: path, error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

func validate(string: String, path: String) throws {
    let error: ParsingError? = nil
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

func validate(json: JSON, path: String, error: ParsingError) throws {
    try JSON(json).validate(path: path, error: &error)
}

func validate(string: String, path: String, error: ParsingError) throws {
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error)
}

func validate(json: JSON, path: String, error: ParsingError, pathError: ParsingError) throws {
    try JSON(json).validate(path: path, error: &error, pathError: &pathError)
}

func validate(string: String, path: String, error: ParsingError, pathError: ParsingError) throws {
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error, pathError: &pathError)
}

func validate(json: JSON, path: String, error: ParsingError, pathError: ParsingError, pathError2: ParsingError) throws {
    try JSON(json).validate(path: path, error: &error, pathError: &pathError, pathError2: &pathError2)
}

func validate(string: String, path: String, error: ParsingError, pathError: ParsingError, pathError2: ParsingError) throws {
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error, pathError: &pathError, pathError2: &pathError2)
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let result: JSON = try JSON(JSONDeserializer.deserialize(string: string, error: &error))
    if error != nil {
        switch error {
            case ParsingError.invalidInput:
                throw ParsingError.invalidInput
            default:
                throw ParsingError.internalError(error)
        }
    }
    return result
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let result: String = try JSON(json).serialize(error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
    return result
}

// JSON deserializer, returns custom error type in case of failures.
func deserialize(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let result: JSON = try JSON(JSONDeserializer.deserialize(string: string, error: &error))
    if error != nil {
        throw ParsingError.internalError(error)
    }
    return result
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    let error: ParsingError? = nil
    try JSON(json).validate(error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

// JSON validator, returns custom error type in case of failures.
func validate(string: String) throws {
    let error: ParsingError? = nil
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON, path: String) throws {
    let error: ParsingError? = nil
    try JSON(json).validate(path: path, error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

// JSON validator, returns custom error type in case of failures.
func validate(string: String, path: String) throws {
    let error: ParsingError? = nil
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error)
    if error != nil {
        throw ParsingError.internalError(error)
    }
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON, path: String, error: ParsingError) throws {
    try JSON(json).validate(path: path, error: &error)
}

// JSON validator, returns custom error type in case of failures.
func validate(string: String, path: String, error: ParsingError) throws {
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error)
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON, path: String, error: ParsingError, pathError: ParsingError) throws {
    try JSON(json).validate(path: path, error: &error, pathError: &pathError)
}

// JSON validator, returns custom error type in case of failures.
func validate(string: String, path: String, error: ParsingError, pathError: ParsingError) throws {
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error, pathError: &pathError)
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON, path: String, error: ParsingError, pathError: ParsingError, pathError2: ParsingError) throws {
    try JSON(json).validate(path: path, error: &error, pathError: &pathError, pathError2: &pathError2)
}

// JSON validator, returns custom error type in case of failures.
func validate(string: String, path: String, error: ParsingError, pathError: ParsingError, pathError2: ParsingError) throws {
    try JSON(JSONDeserializer.deserialize(string: string, error: &error)).validate(path: path, error: &error, pathError: &pathError, pathError2: &pathError2)
}

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let json: JSON = JSON()
    let error: ParsingError? = nil
    for (index, char) in string.characters.enumerated() {
        switch char {
            case '[':
                json[index] = parseArray(string, index)
                break
            case '{':
                json[index] = parseObject(string, index)
                break
            case '"':
                json[index] = parseString(string, index)
                break
            case 't':
                json[index] = true
                break
            case 'f':
                json[index] = false
                break
            case 'n':
                json[index] = nil
                break
            case '-':
            case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
                json[index] = parseNumber(string, index)
                break
            default:
                error = ParsingError.invalidInput
                break
        }
    }
    if let error = error {
        throw error
    }
    return json
}

func parseArray(string: String, startIndex: Int) -> [Any] {
    var array: [Any] = []
    var error: ParsingError? = nil
    for (index, char) in string.characters.enumerated() {
        switch char {
            case '[':
                array[index] = parseArray(string, index)
                break
            case '{':
                array[index] = parseObject(string, index)
                break
            case '"':
                array[index] = parseString(string, index)
                break
            case 't':
                array[index] = true
                break
            case 'f':
                array[index] = false
                break
            case 'n':
                array[index] = nil
                break
            case '-':
            case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
                array[index] = parseNumber(string, index)
                break
            case ',':
                array[index] = parse(string[startIndex + 1..<index])
                break
            case ']':
                return array
            default:
                error = ParsingError.invalidInput
                break
        }
    }
    if let error = error {
        throw error
    }
    return array
}

func parseObject(string: String, startIndex: Int) -> JSON {
    var object: JSON = JSON()
    var error: ParsingError? = nil
    for (index, char) in string.characters.enumerated() {
        switch char {
            case '{':
                object[index] = parseObject(string, index)
                break
            case '"':
                object[index] = parseString(string, index)
                break
            case 't':
                object[index] = true
                break
            case 'f':
                object[index] = false
                break
            case 'n':
                object[index] = nil
                break
            case '-':
            case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
                object[index] = parseNumber(string, index)
                break
            case ',':
                object[index] = parse(string[startIndex + 1..<index])
                break
            case '}':
                return object
            default:
                error = ParsingError.invalidInput
                break
        }
    }
    if let error = error {
        throw error
    }
    return object
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let json: JSON = JSON()
    let error: ParsingError? = nil
    for (index, char) in string.characters.enumerated() {
        switch char {
            case '[':
                json[index] = parseArray(string, index)
                break
            case '{':
                json[index] = parseObject(string, index)
                break
            case '"':
                json[index] = parseString(string, index)
                break
            case 't':
                json[index] = true
                break
            case 'f':
                json[index] = false
                break
            case 'n':
                json[index] = nil
                break
            case '-':
            case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
                json[index] = parseNumber(string, index)
                break
            default:
                error = ParsingError.invalidInput
                break
        }
    }
    if let error = error {
        throw error
    }
    return json
}

func parseArray(string: String, startIndex: Int) -> [Any] {
    var array: [Any] = []
    var error: ParsingError? = nil
    for (index, char) in string.characters.enumerated() {
        switch char {
            case '[':
                array[index] = parseArray(string, index)
                break
            case '{':
                array[index] = parseObject(string, index)
                break
            case '"':
                array[index] = parseString(string, index)
                break
            case 't':
                array[index] = true
                break
            case 'f':
                array[index] = false
                break
            case 'n':
                array[index] = nil
                break
            case '-':
            case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
                array[index] = parseNumber(string, index)
                break
            case ',':
                array[index] = parse(string[startIndex + 1..<index])
                break
            case ']':
                return array
            default:
                error = ParsingError.invalidInput
                break
        }
    }
    if let error = error {
        throw error
    }
    return array
}

func parseObject(string: String, startIndex: Int) -> JSON {
    var object: JSON = JSON()
    var error: ParsingError? = nil
    for (index, char) in string.characters.enumerated() {
        switch char {
            case '{':
                object[index] = parseObject(string, index)
                break
            case '"':
                object[index] = parseString(string, index)
                break
            case 't':
                object[index] = true
                break
            case 'f':
                object[index] = false
                break
            case 'n':
                object[index] = nil
                break
            case '-':
            case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
                object[index] = parseNumber(string, index)
                break
            case ',':
                object[index] = parse(string[startIndex + 1..<index])
                break
            case '}':
                return object
            default:
                error = ParsingError.invalidInput
                break
        }
    }
    if let error = error {
        throw error
    }
    return object
}

func parseString(string: String, startIndex: Int) -> String {
    var string: String = ""
    var error: ParsingError? = nil
    for (index, char) in string.characters.enumerated() {
        switch char {
            case '"':
                return string
            case '\\':
                switch string[index + 1] {
                    case '"':
                        string += '"'
                        break
                    case '\\':
                        string += '\\'
                        break
                    case '/':
                        string += '/'
                        break
                    case 'b':
                        string += '\b'
                        break
                    case 'f':
                        string += '\f'
                        break
                    case 'n':
                        string += '\n'
                        break
                    case 'r':

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let json: JSON = JSON()
    let stack: [String: Int] = [String: 0]
    let current: String? = nil
    let currentDepth: Int = 0
    let depth: Int = 0
    let currentKey: String? = nil
    let currentKeyDepth: Int = 0
    let currentKeyDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackIndex: Int = 0
    let currentKeyDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackIndex: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepth: Int = 0
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStack: [String: Int] = [String: 0]
    let currentKeyDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepthStackDepth

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let parser = Parser(string)
    let result = parser.parse()
    if let error = result.error {
        throw ParsingError.internalError(error)
    }
    return result.value
}

// Parser class
class Parser {
    var string: String
    var index: Int
    var error: Error?

    init(string: String) {
        self.string = string
        self.index = 0
        self.error = nil
    }

    // Parse the string and return the parsed JSON object.
    // Returns a tuple of the parsed JSON object and an error object.
    func parse() -> (JSON, Error?) {
        let result = self.parseObject()
        if let error = result.error {
            return (nil, error)
        }
        return (result.value, nil)
    }

    // Parse a JSON object.
    // Returns a tuple of the parsed JSON object and an error object.
    func parseObject() -> (JSON, Error?) {
        let result = self.parseObjectBody()
        if let error = result.error {
            return (nil, error)
        }
        return (result.value, nil)
    }

    // Parse a JSON object body.
    // Returns a tuple of the parsed JSON object and an error object.
    func parseObjectBody() -> (JSON, Error?) {
        if self.string[self.index] != "{" {
            return (nil, ParsingError.invalidInput)
        }
        self.index += 1
        let object = self.parseObjectPropertyList()
        if let error = object.error {
            return (nil, error)
        }
        if self.string[self.index] != "}" {
            return (nil, ParsingError.invalidInput)
        }
        self.index += 1
        return (object.value, nil)
    }

    // Parse a JSON object property list.
    // Returns a tuple of the parsed JSON object and an error object.
    func parseObjectPropertyList() -> (JSON, Error?) {
        let result = self.parseObjectProperty()
        if let error = result.error {
            return (nil, error)
        }
        let properties = [result.value]
        while self.string[self.index] == "," {
            self.index += 1
            let result = self.parseObjectProperty()
            if let error = result.error {
                return (nil, error)
            }
            properties.append(result.value)
        }
        return (properties, nil)
    }

    // Parse a JSON object property.
    // Returns a tuple of the parsed JSON object and an error object.
    func parseObjectProperty() -> (JSON, Error?) {
        let result = self.parseString()
        if let error = result.error {
            return (nil, error)
        }
        let key = result.value
        if self.string[self.index] != ":" {
            return (nil, ParsingError.invalidInput)
        }
        self.index += 1
        let result = self.parseObjectValue()
        if let error = result.error {
            return (nil, error)
        }
        return (key: key, value: result.value), nil
    }

    // Parse a JSON object value.
    // Returns a tuple of the parsed JSON object and an error object.
    func parseObjectValue() -> (JSON, Error?) {
        if self.string[self.index] == "{" {
            return self.parseObject()
        }
        if self.string[self.index] == "[" {
            return self.parseArray()
        }
        if self.string[self.index] == '"' {
            return self.parseString()
        }
        if self.string[self.index] == "t" || self.string[self.index] == "f" {
            return self.parseBoolean()
        }
        if self.string[self.index] == "n" {
            return self.parseNull()
        }
        return (nil, ParsingError.invalidInput)
    }

    // Parse a JSON array.
    // Returns a tuple of the parsed JSON object and an error object.
    func parseArray() -> (JSON, Error?) {
        if self.string[self.index] != "[" {
            return (nil, ParsingError.invalid

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try JSON(from: string)
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json:

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

func serialize(json: JSON) throws -> String {
    let string: String = try String(from: json)
    return string
}

func deserialize(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

func validate(json: JSON) throws {
    if json is nil {
        throw ParsingError.invalidInput
    }
}

func parse(string: String) throws -> JSON {
    validate(json: json)
    let json: JSON = try JSON(from: string)
    return json
}

func serialize(json: JSON) throws -> String {
    validate(json: json)
    let string: String = try String(from: json)
    return string
}

func deserialize(string: String) throws -> JSON {
    validate(json: json)
    let json: JSON = try JSON(from: string)
    return json
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let string: String = try String(from: json)
    return string
}

// JSON deserializer, returns custom error type in case of failures.
func deserialize(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    if json is nil {
        throw ParsingError.invalidInput
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    validate(json: json)
    let json: JSON = try JSON(from: string)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    validate(json: json)
    let string: String = try String(from: json)
    return string
}

// JSON deserializer, returns custom error type in case of failures.
func deserialize(string: String) throws -> JSON {
    validate(json: json)
    let json: JSON = try JSON(from: string)
    return json
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    if json is nil {
        throw ParsingError.invalidInput
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let string: String = try String(from: json)
    return string
}

// JSON deserializer, returns custom error type in case of failures.
func deserialize(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    if json is nil {
        throw ParsingError.invalidInput
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    validate(json: json)
    let json: JSON = try JSON(from: string)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    validate(json: json)
    let string: String = try String(from: json)
    return string
}

// JSON deserializer, returns custom error type in case of failures.
func deserialize(string: String) throws -> JSON {
    validate(json: json)
    let json: JSON = try JSON(from: string)
    return json
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    if json is nil {
        throw ParsingError.invalidInput
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let string: String = try String(from: json)
    return string
}

// JSON deserializer, returns custom error type in case of failures.
func deserialize(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON) throws {
    if json is nil {
        throw ParsingError.invalidInput
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let json: JSON = try JSON(from: string)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let string: String = try String(from: json)

typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if json == nil {
        error = ParsingError.invalidInput
    }
    if let error = error {
        throw error
    }
    return json
}

func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(rawValue: json)
    if string == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return string
}

func encode(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(
        rawValue: JSON(json).data(using: .prettyPrinted),
    )
    if string == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return string
}

func decode(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if json == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return json
}

```swift
typealias JSON = [String: Any]

enum ParsingError: Error {
    case invalidInput
    case internalError(Error)
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if json == nil {
        error = ParsingError.invalidInput
    }
    if let error = error {
        throw error
    }
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(rawValue: json)
    if string == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return string
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(
        rawValue: JSON(json).data(using: .prettyPrinted),
    )
    if string == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return string
}

// JSON decoder, returns custom error type in case of failures.
func decode(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if json == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if json == nil {
        error = ParsingError.invalidInput
    }
    if let error = error {
        throw error
    }
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(rawValue: json)
    if string == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return string
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(
        rawValue: JSON(json).data(using: .prettyPrinted),
    )
    if string == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return string
}

// JSON decoder, returns custom error type in case of failures.
func decode(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if json == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return json
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    let error: ParsingError? = nil
    let json: JSON = try? JSON(rawValue: string)
    if json == nil {
        error = ParsingError.invalidInput
    }
    if let error = error {
        throw error
    }
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(rawValue: json)
    if string == nil {
        error = ParsingError.internalError(error: Error())
    }
    if let error = error {
        throw error
    }
    return string
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    let error: ParsingError? = nil
    let string: String = try? String(
        rawValue: JSON(json).data(using: .prettyPrinted),
    )
    if string == nil {

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        match node {
            case HTMLNode.text(_ content) in
                result += content
            case HTMLNode.element(_ name, _ attributes, _ children) in
                result += "<$name"
                for (index, attribute) in attributes.enumerated() {
                    result += " $attribute"
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            }
        stack.removeLast()
    }
    result += "</$name>"
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        match node {
            case HTMLNode.text(_ content) in
                result += content
            case HTMLNode.element(_ name, _ attributes, _ children) in
                result += "<$name"
                for (index, attribute) in attributes.enumerated() {
                    result += " $attribute"
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            }
        stack.removeLast()
    }
    result += "</$name>"
    return result
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        match node {
            case HTMLNode.text(_ content) in
                result += content
            case HTMLNode.element(_ name, _ attributes, _ children) in
                result += "<$name"
                for (index, attribute) in attributes.enumerated() {
                    result += " $attribute"
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            }
        stack.removeLast()
    }
    result += "</$name>"
    return result
}
```

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        switch node {
            case let element(name, attributes, children) in
                result += "<" + name
                for key, value in attributes {
                    result += " " + key + "=\"" + value + "\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case let text(content) in
                result += content
            case let element(name, attributes, children) in
                result += "</" + name + ">"
        }
        stack.removeLast()
    }
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        switch node {
            case let element(name, attributes, children) in
                result += "<" + name
                for key, value in attributes {
                    result += " " + key + "=\"" + value + "\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case let text(content) in
                result += content
            case let element(name, attributes, children) in
                result += "</" + name + ">"
        }
        stack.removeLast()
    }
    return result
}

// Test
let tree = HTMLNode.element("div", [String : String]([@"class" : @"test"]), [HTMLNode.element("a", [String : String]([@"href" : @"swifteval"]), [])])
print(generate(tree))
```

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        switch node {
            case let HTMLNode.text(content) in
                result += content
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
        }
    }
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        switch node {
            case let HTMLNode.text(content) in
                result += content
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
        }
    }
    return result
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        switch node {
            case let HTMLNode.text(content) in
                result += content
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
        }
    }
    return result
}
```

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        match node {
            case HTMLNode.text(content) in
                result += content
            case HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (index, attribute) in attributes.enumerated() {
                    result += " $attribute"
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (index, attribute) in attributes.enumerated() {
                    result += " $attribute"
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case HTMLNode.element(name, attributes, children) in
                for child in children {
                    stack.append(child)
                }
        }
        stack.removeLast()
    }
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        match node {
            case HTMLNode.text(content) in
                result += content
            case HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (index, attribute) in attributes.enumerated() {
                    result += " $attribute"
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (index, attribute) in attributes.enumerated() {
                    result += " $attribute"
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case HTMLNode.element(name, attributes, children) in
                for child in children {
                    stack.append(child)
                }
        }
        stack.removeLast()
    }
    return result
}
```

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        switch node {
            case let element(name: _ name, attributes: _ attributes, children: _ children) {
                let attributesString = attributes.map({
                    case let key: key, value: value {
                        return key + "=\"" + value + "\""
                    }
                }).join(" ")
                result += "<" + name + attributesString + ">"
                for child in children {
                    stack.append(child)
                }
            }
            case let text(content: _ content) {
                result += content
            }
        }
        stack.removeLast()
    }
    return "<div>" + result + "</div>"
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        switch node {
            case let element(name: _ name, attributes: _ attributes, children: _ children) {
                let attributesString = attributes.map({
                    case let key: key, value: value {
                        return key + "=\"" + value + "\""
                    }
                }).join(" ")
                result += "<" + name + attributesString + ">"
                for child in children {
                    stack.append(child)
                }
            }
            case let text(content: _ content) {
                result += content
            }
        }
        stack.removeLast()
    }
    return "<div>" + result + "</div>"
}
```

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (name, value) in element.attributes {
                result += " " + name + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        } else {
            fatalError("Unexpected node type: " + String(node))
        }
    }
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (name, value) in element.attributes {
                result += " " + name + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        } else {
            fatalError("Unexpected node type: " + String(node))
        }
    }
    return result
}

// Example usage.
let tree = HTMLNode.element("div", [String : String]([
    ["id", "main"],
    ["class", "container"]
]), [
    HTMLNode.element("a", [String : String]([
        ["href", "swifteval"]
    ])),
    HTMLNode.element("p", [String : String]([
        ["class", "main-text"]
    ])),
    HTMLNode.text("Hello, world!")
])

print(generate(tree))
```

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    var result = ""
    var stack = [HTMLNode]([tree])
    while let node = stack.pop() {
        switch node {
            case let element(name, attributes, children) {
                result += "<" + name
                for let attribute in attributes {
                    result += " " + attribute + "=\"" + attributes[attribute] + "\""
                }
                result += ">"
                for let child in children {
                    stack.push(child)
                }
            }
            case let text(content) {
                result += content
            }
        }
    }
    return "<div>" + result + "</div>"
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    var stack = [HTMLNode]([tree])
    while let node = stack.pop() {
        switch node {
            case let element(name, attributes, children) {
                result += "<" + name
                for let attribute in attributes {
                    result += " " + attribute + "=\"" + attributes[attribute] + "\""
                }
                result += ">"
                for let child in children {
                    stack.push(child)
                }
            }
            case let text(content) {
                result += content
            }
        }
    }
    return "<div>" + result + "</div>"
}

// Test
let tree = HTMLNode.element("div", [String : String]([@"class" : "test"]), [HTMLNode.element("a", [String : String]([@"href" : "swifteval"]), [])])
print(generate(tree))
```

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        switch node {
            case let HTMLNode.text(content) in
                result += content
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
        }
        stack.removeLast()
    }
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.last {
        switch node {
            case let HTMLNode.text(content) in
                result += content
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
            case let HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.append(child)
                }
        }
        stack.removeLast()
    }
    return result
}

// HTML parser from string.
// Output with predefined elements tree.
// Example: "<div><a href="swifteval"></a></div>" -> [HTMLNode.element(name: "div", attributes: [:], children: [HTMLNode.element(name: "a", attributes: [:href: "swifteval"], children: [])])]
func parse(_ string) -> [HTMLNode] {
    let result = [HTMLNode.element(name: "div", attributes: [:], children: [])]
    let stack = [result]
    let current = result.last
    for c in string.characters(string: _string) {
        if c == "<" {
            let name = String()
            let attributes = [String : String]()
            let children = [HTMLNode]()
            let inAttributes = false
            let inChildren = false
            let inName = true
            let inAttributesKey = false
            let inAttributesValue = false
            let inChildrenKey = false
            let inChildrenValue = false
            for c in string.characters(string: _string) {
                if c == " " {
                    if inName {
                        inName = false
                        inAttributesKey = true
                    } else if inAttributesKey {
                        inAttributesKey = false
                        inAttributesValue = true
                    } else if inAttributesValue {
                        inAttributesValue = false
                        inAttributesKey = true
                    } else if inChildrenKey {
                        inChildrenKey = false
                        inChildrenValue = true
                    } else if inChildrenValue {
                        inChildrenValue = false
                        inChildren = true
                    }
                } else if c == ">" {
                    if inName {
                        current.name = name
                        inName = false
                    } else if inAttributesKey {
                        inAttributesKey = false
                        inAttributesValue = true
                    } else if inAttributesValue {
                        inAttributesValue = false
                        inAttributes[name] = String()
                    } else if inChildrenKey {
                        inChildrenKey = false
                        inChildrenValue = true
                    } else if inChildrenValue {
                        inChildrenValue = false
                        inChildren = true
                    }
                } else if c == "/" {
                    if inName {
                        current.name = name
                        inName = false
                    } else if inAttributesKey {
                        inAttributesKey = false
                        inAttributesValue = true
                    } else if inAttributesValue {
                        inAttributesValue = false
                        inAttributes[name] = String()
                    } else if inChildrenKey {
                        inChildrenKey = false
                        inChildrenValue = true
                    } else if inChildrenValue {
                        inChildrenValue = false
                        inChildren = true
                    }
                } else if c == <|fim_middle|>HTMLNode.element(name: "div", attributes: [:], children: [])
]<|file_separator|>

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (key, value) in element.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(0, child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        }
    }
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (key, value) in element.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(0, child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        }
    }
    return result
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (key, value) in element.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(0, child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        }
    }
    return result
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (key, value) in element.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(0, child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        }
    }
    return result
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (key, value) in element.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(0, child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        }
    }
    return result
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.popFirst() {
        if let element = node as? HTMLNode.element {
            result += "<" + element.name
            for (key, value) in element.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in element.children {
                stack.insert(0, child)
            }
            result += "</" + element.name + ">"
        } else if let text = node as? HTMLNode.text {
            result += text.content
        }
    }
    return result
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    var result = ""
    let stack = [tree]
    while let node = stack.pop

indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.popFirst() {
        match node {
            case HTMLNode.text(content) in
                result += content
            case HTMLNode.element(name, attributes, children) in
                result += "<" + name
                for (index, attribute) in attributes.enumerated() {
                    result += " " + attribute + "=\"" + children[index].generate() + "\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            }
        }
    return result
}

```swift
indirect enum HTMLNode {
    case text(_ content: String)
    case element(_ name: String, attributes: [String : String] = [:], children: [Self] = [])
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let result = String()
    let stack = [tree]
    while let node = stack.popFirst() {
        match node {
            case HTMLNode.text(content) in
                result += content
            case HTMLNode.element(name, attributes, children) in
                result += "<" + name
                for (index, attribute) in attributes.enumerated() {
                    result += " " + attribute + "=\"" + children[index].generate() + "\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            }
        }
    return result
}

// Test
let tree = HTMLNode.element("div", [String : String](["id" : "my_div"]), [HTMLNode.element("a", [String : String](["href" : "swifteval"]), [HTMLNode.text("swifteval")])])
print(tree.generate())
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack = ArrayDeque<Double>()
    var token = ""
    var tokenType = TokenType.None
    var tokenValue = 0.0
    var error = false
    var errorType = CalculateError.invalidInput
    for index in 0..<string.length {
        var c = string[index]
        if c.isWhitespace {
            continue
        }
        if c.isDigit {
            token += c
            tokenType = TokenType.Number
        } else {
            switch tokenType {
                case TokenType.Number:
                    tokenValue = token.toDouble()
                    stack.push(tokenValue)
                    token = ""
                    tokenType = TokenType.None
                    break
                case TokenType.None:
                    tokenType = TokenType.Operator
                    tokenValue = c
                    break
                default:
                    error = true
                    errorType = CalculateError.invalidInput
                    break
            }
        }
    }
    switch tokenType {
        case TokenType.Number:
            tokenValue = token.toDouble()
            stack.push(tokenValue)
            token = ""
            tokenType = TokenType.None
            break
        case TokenType.None:
            break
        default:
            error = true
            errorType = CalculateError.invalidInput
            break
    }
    if error {
        throw errorType
    }
    var result = 0.0
    var operator = ""
    while let value = stack.popFirst {
        switch operator {
            case "+":
                result += value
                break
            case "-":
                result -= value
                break
            case "*":
                result *= value
                break
            case "/":
                result /= value
                break
            default:
                result = value
                break
        }
        if let nextOperator = stack.first {
            operator = nextOperator
        } else {
            break
        }
    }
    return result
}

enum TokenType: String {
    case number
    case operator
    case None
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack = ArrayDeque<Double>()
    var token = ""
    var tokenType = TokenType.None
    var tokenValue = 0.0
    var error = false
    var errorType = CalculateError.invalidInput
    for index in 0..<string.length {
        var c = string[index]
        if c.isWhitespace {
            continue
        }
        if c.isDigit {
            token += c
            tokenType = TokenType.Number
        } else {
            switch tokenType {
                case TokenType.Number:
                    tokenValue = token.toDouble()
                    stack.push(tokenValue)
                    token = ""
                    tokenType = TokenType.None
                    break
                case TokenType.None:
                    tokenType = TokenType.Operator
                    tokenValue = c
                    break
                default:
                    error = true
                    errorType = CalculateError.invalidInput
                    break
            }
        }
    }
    switch tokenType {
        case TokenType.Number:
            tokenValue = token.toDouble()
            stack.push(tokenValue)
            token = ""
            tokenType = TokenType.None
            break
        case TokenType.None:
            break
        default:
            error = true
            errorType = CalculateError.invalidInput
            break
    }
    if error {
        throw errorType
    }
    var result = 0.0
    var operator = ""
    while let value = stack.popFirst {
        switch operator {
            case "+":
                result += value
                break
            case "-":
                result -= value
                break
            case "*":
                result *= value
                break
            case "/":
                result /= value
                break
            default:
                result = value
                break
        }
        if let nextOperator = stack.first {
            operator = nextOperator
        } else {
            break
        }
    }
    return result
}

enum TokenType: String {
    case number
    case operator
    case None
}

```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["2", "+", "2", "*", "2"]
    var stack: [Double] = []
    var operator: String = ""
    var operand: Double = 0.0
    for i in 0..<tokens.count {
        switch tokens[i] {
            case "+":
                operator = "+"
                operand = stack.pop()!
                stack.append(operand + stack.pop()!)
                break
            case "-":
                operator = "-"
                operand = stack.pop()!
                stack.append(operand - stack.pop()!)
                break
            case "*":
                operator = "*"
                operand = stack.pop()!
                stack.append(operand * stack.pop()!)
                break
            case "/":
                operator = "/"
                operand = stack.pop()!
                stack.append(operand / stack.pop()!)
                break
            default:
                stack.append(Double(Int(tokens[i])!))
                break
        }
    }
    return stack.pop()!
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["2", "+", "2", "*", "2"]
    var stack: [Double] = []
    var operator: String = ""
    var operand: Double = 0.0
    for i in 0..<tokens.count {
        switch tokens[i] {
            case "+":
                operator = "+"
                operand = stack.pop()!
                stack.append(operand + stack.pop()!)
                break
            case "-":
                operator = "-"
                operand = stack.pop()!
                stack.append(operand - stack.pop()!)
                break
            case "*":
                operator = "*"
                operand = stack.pop()!
                stack.append(operand * stack.pop()!)
                break
            case "/":
                operator = "/"
                operand = stack.pop()!
                stack.append(operand / stack.pop()!)
                break
            default:
                stack.append(Double(Int(tokens[i])!))
                break
        }
    }
    return stack.pop()!
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["2", "+", "2", "*", "2"]
    var stack: [Double] = []
    var operator: String = ""
    var operand: Double = 0.0
    for i in 0..<tokens.count {
        switch tokens[i] {
            case "+":
                operator = "+"
                operand = stack.pop()!
                stack.append(operand + stack.pop()!)
                break
            case "-":
                operator = "-"
                operand = stack.pop()!
                stack.append(operand - stack.pop()!)
                break
            case "*":
                operator = "*"
                operand = stack.pop()!
                stack.append(operand * stack.pop()!)
                break
            case "/":
                operator = "/"
                operand = stack.pop()!
                stack.append(operand / stack.pop()!)
                break
            default:
                stack.append(Double(Int(tokens[i])!))
                break
        }
    }
    return stack.pop()!
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["2", "+", "2", "*", "2"]
    var stack: [Double] = []
    var operator: String = ""
    var operand: Double = 0.0
    for i in 0..<tokens.count {
        switch tokens[i] {
            case "+":
                operator = "+"
                operand = stack.pop()!
                stack.append(operand + stack.pop()!)
                break
            case "-":
                operator = "-"
                operand = stack.pop()!
                stack.append(operand - stack.pop()!)
                break
            case "*":
                operator = "*"
                operand = stack.pop()!
                stack.append(operand * stack.pop()!)
                break
            case "/":
                operator = "/"
                operand = stack.pop()!
                stack.append(operand / stack.pop()!)
                break
            default:
                stack.append(Double(Int(tokens[i])!))
                break
        }
    }
    return stack.pop()!
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["2", "+", "2", "*", "2"]
    var stack: [Double] = []
    var operator: String = ""
    var operand: Double = 0.0
    for i in 0..<tokens.count {
        switch tokens[i] {
            case "+":
                operator = "+"
                operand = stack.pop()!
                stack.append(operand + stack.pop()!)
                break
            case "-":
                operator = "-"
                operand = stack.pop()!
                stack.append(operand - stack.pop()!)
                break
            case "*":
                operator = "*"

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack = ArrayDeque<Double>()
    var tokens = string.components(separatedBy: " ")
    for _, token in tokens {
        switch token {
            case "+":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a + b)
            case "-":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(b - a)
            case "*":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a * b)
            case "/":
                var a = stack.pop()
                var b = stack.pop()
                if (a == 0) {
                    throw CalculateError.invalidInput
                }
                stack.push(b / a)
            case "(":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a * b)
            case ")":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a * b)
            default:
                var value = Double(token)
                if (value.isNaN() || value.isInfinite()) {
                    throw CalculateError.invalidInput
                }
                stack.push(value)
        }
    }
    return stack.pop()
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack = ArrayDeque<Double>()
    var tokens = string.components(separatedBy: " ")
    for _, token in tokens {
        switch token {
            case "+":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a + b)
            case "-":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(b - a)
            case "*":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a * b)
            case "/":
                var a = stack.pop()
                var b = stack.pop()
                if (a == 0) {
                    throw CalculateError.invalidInput
                }
                stack.push(b / a)
            case "(":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a * b)
            case ")":
                var a = stack.pop()
                var b = stack.pop()
                stack.push(a * b)
            default:
                var value = Double(token)
                if (value.isNaN() || value.isInfinite()) {
                    throw CalculateError.invalidInput
                }
                stack.push(value)
        }
    }
    return stack.pop()
}
<|file_separator|>

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var token: String = ""
    var tokenType: TokenType = TokenType.None
    var tokenValue: Double = 0.0
    
    for i in 0..<string.length {
        var char: Char = string[i]
        
        if char.isWhitespace {
            continue
        }
        
        if char.isDigit {
            token += char
            tokenType = TokenType.Number
        } else if char.isLetter {
            token += char
            tokenType = TokenType.Variable
        } else {
            tokenType = TokenType.Operator
            tokenValue = char.rawValue
        }
        
        if tokenType != TokenType.None {
            if tokenType == TokenType.Number {
                tokenValue = token.toDouble()
            }
            
            if tokenType == TokenType.Operator {
                if tokenValue == TokenType.Plus {
                    stack.append(tokenValue)
                } else if tokenValue == TokenType.Minus {
                    stack.append(-tokenValue)
                } else if tokenValue == TokenType.Multiply {
                    stack.append(stack.pop() * tokenValue)
                } else if tokenValue == TokenType.Divide {
                    stack.append(stack.pop() / tokenValue)
                } else {
                    throw CalculateError.invalidInput
                }
            }
            
            token = ""
            tokenType = TokenType.None
        }
    }
    
    if stack.count > 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.pop()
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var token: String = ""
    var tokenType: TokenType = TokenType.None
    var tokenValue: Double = 0.0
    
    for i in 0..<string.length {
        var char: Char = string[i]
        
        if char.isWhitespace {
            continue
        }
        
        if char.isDigit {
            token += char
            tokenType = TokenType.Number
        } else if char.isLetter {
            token += char
            tokenType = TokenType.Variable
        } else {
            tokenType = TokenType.Operator
            tokenValue = char.rawValue
        }
        
        if tokenType != TokenType.None {
            if tokenType == TokenType.Number {
                tokenValue = token.toDouble()
            }
            
            if tokenType == TokenType.Operator {
                if tokenValue == TokenType.Plus {
                    stack.append(tokenValue)
                } else if tokenValue == TokenType.Minus {
                    stack.append(-tokenValue)
                } else if tokenValue == TokenType.Multiply {
                    stack.append(stack.pop() * tokenValue)
                } else if tokenValue == TokenType.Divide {
                    stack.append(stack.pop() / tokenValue)
                } else {
                    throw CalculateError.invalidInput
                }
            }
            
            token = ""
            tokenType = TokenType.None
        }
    }
    
    if stack.count > 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.pop()
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var token: String = ""
    var tokenType: TokenType = TokenType.None
    var tokenValue: Double = 0.0
    
    for i in 0..<string.length {
        var char: Char = string[i]
        
        if char.isWhitespace {
            continue
        }
        
        if char.isDigit {
            token += char
            tokenType = TokenType.Number
        } else if char.isLetter {
            token += char
            tokenType = TokenType.Variable
        } else {
            tokenType = TokenType.Operator
            tokenValue = char.rawValue
        }
        
        if tokenType != TokenType.None {
            if tokenType == TokenType.Number {
                tokenValue = token.toDouble()
            }
            
            if tokenType == TokenType.Operator {
                if tokenValue == TokenType.Plus {
                    stack.append(tokenValue)
                } else if tokenValue == TokenType.Minus {
                    stack.append(-tokenValue)
                } else if tokenValue == TokenType.Multiply {
                    stack.append(stack.pop() * tokenValue)
                } else if tokenValue == TokenType.Divide {
                    stack.append(stack.pop() / tokenValue)
                } else {
                    throw CalculateError.invalidInput
                }
            }
            
            token = ""
            tokenType = TokenType.None
        }
    }
    
    if stack.count > 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.pop()
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var token: String = ""
    var tokenType: TokenType = TokenType.None
    var tokenValue: Double = 0.0
    
    for i in 0..<string.length {
        var char: Char = string[i]
        
        if char.isWhitespace {
            continue
        }
        
        if char.isDigit {
            token += char
            tokenType = TokenType.Number
        } else if char.isLetter {
            token += char
            tokenType = TokenType.Variable
        } else {
            tokenType = TokenType.Operator
            tokenValue = char.rawValue
        }
        
        if tokenType != TokenType.None {
            if tokenType == TokenType.Number {
                tokenValue = token.toDouble()
            }
            
            if tokenType == TokenType.Operator {
                if tokenValue == TokenType.Plus {
                    stack

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack = Array<Double>()
    var tokens = string.split(of: " ", canSplitEmpty: true)
    for _, token in tokens {
        switch token {
            case "+":
                if let a = stack.last, let b = stack.pop(), let c = a + b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "-":
                if let a = stack.last, let b = stack.pop(), let c = a - b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "*":
                if let a = stack.last, let b = stack.pop(), let c = a * b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "/":
                if let a = stack.last, let b = stack.pop(), let c = a / b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "(":
                if let a = stack.last, let b = stack.pop(), let c = a + b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case ")":
                if let a = stack.last, let b = stack.pop(), let c = a - b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case _:
                stack.append(Double(token))
                break
        }
    }
    return stack.last
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack = Array<Double>()
    var tokens = string.split(of: " ", canSplitEmpty: true)
    for _, token in tokens {
        switch token {
            case "+":
                if let a = stack.last, let b = stack.pop(), let c = a + b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "-":
                if let a = stack.last, let b = stack.pop(), let c = a - b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "*":
                if let a = stack.last, let b = stack.pop(), let c = a * b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "/":
                if let a = stack.last, let b = stack.pop(), let c = a / b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case "(":
                if let a = stack.last, let b = stack.pop(), let c = a + b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case ")":
                if let a = stack.last, let b = stack.pop(), let c = a - b {
                    stack.append(c)
                } else {
                    throw CalculateError.invalidInput
                }
                break
            case _:
                stack.append(Double(token))
                break
        }
    }
    return stack.last
}

func main() {
    print(calculate("2+2*2"))
    print(calculate("2+2*2+2"))
    print(calculate("2+2*2+2*2"))
    print(calculate("2+2*2+2*2+2"))
    print(calculate("2+2*2+2*2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2+2"))
    print(calculate("2+2*2+2*2+2+2+2+2+2+2+2+2+2+2+2+2+

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["(", ")", "+", "-", "*", "/"]
    var stack: [Double] = []
    var operator: [String] = []
    var number: Double = 0.0
    var error: CalculateError = CalculateError.invalidInput
    for i in 0..<string.length {
        if string[i..<string.length].contains(tokens) {
            continue
        } else if string[i..<string.length].contains(digits) {
            number = number * 10 + (string[i..<string.length] as? Double)
            continue
        } else {
            if number != 0.0 {
                stack.append(number)
                number = 0.0
            }
            if operator.count == 0 {
                error = CalculateError.invalidInput
                break
            }
            var op = operator.last!
            var a = stack.last!
            stack.removeLast()
            var b = stack.last!
            stack.removeLast()
            switch op {
                case "+":
                    stack.append(a + b)
                    break
                case "-":
                    stack.append(a - b)
                    break
                case "*":
                    stack.append(a * b)
                    break
                case "/":
                    if b == 0 {
                        error = CalculateError.invalidInput
                        break
                    }
                    stack.append(a / b)
                    break
                default:
                    error = CalculateError.invalidInput
                    break
            }
            operator.removeLast()
        }
    }
    if number != 0.0 {
        stack.append(number)
    }
    if operator.count > 0 {
        error = CalculateError.invalidInput
    }
    if error != CalculateError.invalidInput {
        return stack.last!
    }
    return Double.nan
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["(", ")", "+", "-", "*", "/"]
    var stack: [Double] = []
    var operator: [String] = []
    var number: Double = 0.0
    var error: CalculateError = CalculateError.invalidInput
    for i in 0..<string.length {
        if string[i..<string.length].contains(tokens) {
            continue
        } else if string[i..<string.length].contains(digits) {
            number = number * 10 + (string[i..<string.length] as? Double)
            continue
        } else {
            if number != 0.0 {
                stack.append(number)
                number = 0.0
            }
            if operator.count == 0 {
                error = CalculateError.invalidInput
                break
            }
            var op = operator.last!
            var a = stack.last!
            stack.removeLast()
            var b = stack.last!
            stack.removeLast()
            switch op {
                case "+":
                    stack.append(a + b)
                    break
                case "-":
                    stack.append(a - b)
                    break
                case "*":
                    stack.append(a * b)
                    break
                case "/":
                    if b == 0 {
                        error = CalculateError.invalidInput
                        break
                    }
                    stack.append(a / b)
                    break
                default:
                    error = CalculateError.invalidInput
                    break
            }
            operator.removeLast()
        }
    }
    if number != 0.0 {
        stack.append(number)
    }
    if operator.count > 0 {
        error = CalculateError.invalidInput
    }
    if error != CalculateError.invalidInput {
        return stack.last!
    }
    return Double.nan
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var token: String = ""
    var tokenType: TokenType = TokenType.None
    var tokenValue: Double = 0.0
    for _, c in string(_):
        if c.Character.isWhitespace {
            continue
        }
        if c.Character.isDigit {
            token += c.Character.string
            tokenType = TokenType.Number
        } else {
            switch tokenType {
                case TokenType.Number:
                    tokenValue = Double(token)
                    token = ""
                    tokenType = TokenType.None
                case TokenType.None:
                    tokenType = TokenType.Operator
                    tokenValue = Double(c.Character.string)
                    token = ""
                default:
                    // invalid input
                    return throws(CalculateError.invalidInput)
            }
            switch c.Character.string {
                case "+":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "-":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "*":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "/":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "(":
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case ")":
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                default:
                    // invalid input
                    return throws(CalculateError.invalidInput)
            }
        }
    }
    switch tokenType {
        case TokenType.Number:
            tokenValue = Double(token)
            token = ""
            tokenType = TokenType.None
        case TokenType.None:
            // do nothing
        default:
            // invalid input
            return throws(CalculateError.invalidInput)
    }
    switch tokenType {
        case TokenType.Number:
            stack.append(tokenValue)
        case TokenType.Operator:
            if tokenValue == 0.0 {
                // invalid input
                return throws(CalculateError.invalidInput)
            }
            switch token {
                case "+":
                    stack[stack.count - 2] += tokenValue
                    stack.pop()
                case "-":
                    stack[stack.count - 2] -= tokenValue
                    stack.pop()
                case "*":
                    stack[stack.count - 2] *= tokenValue
                    stack.pop()
                case "/":
                    if tokenValue == 0.0 {
                        // invalid input
                        return throws(CalculateError.invalidInput)
                    }
                    stack[stack.count - 2] /= tokenValue
                    stack.pop()
                default:
                    // invalid input
                    return throws(CalculateError.invalidInput)
            }
        default:
            // invalid input
            return throws(CalculateError.invalidInput)
    }
    if stack.count > 1 {
        // invalid input
        return throws(CalculateError.invalidInput)
    }
    return stack[0]
}

enum TokenType: String {
    case None = ""
    case Number = "Number"
    case Operator = "Operator"
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var token: String = ""
    var tokenType: TokenType = TokenType.None
    var tokenValue: Double = 0.0
    for _, c in string(_):
        if c.Character.isWhitespace {
            continue
        }
        if c.Character.isDigit {
            token += c.Character.string
            tokenType = TokenType.Number
        } else {
            switch tokenType {
                case TokenType.Number:
                    tokenValue = Double(token)
                    token = ""
                    tokenType = TokenType.None
                case TokenType.None:
                    tokenType = TokenType.Operator
                    tokenValue = Double(c.Character.string)
                    token = ""
                default:
                    // invalid input
                    return throws(CalculateError.invalidInput)
            }
            switch c.Character.string {
                case "+":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "-":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "*":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "/":
                    stack.append(tokenValue)
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case "(":
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                case ")":
                    stack.append(tokenValue)
                    tokenType = TokenType.Operator
                    tokenValue = 0.0
                default:
                    // invalid input
                    return throws(CalculateError.invalidInput)
            }
        }
    }
    switch tokenType {
        case TokenType.Number:
            tokenValue = Double(token)
            token = ""
            tokenType = TokenType.None
        case TokenType.None:
            // do nothing
        default:
            // invalid input
            return throws(CalculateError.invalidInput)
    }
    switch tokenType {
        case TokenType.Number:
            stack.append(tokenValue)
        case TokenType.Operator:
            if tokenValue == 0.0 {
                // invalid input
                return throws(CalculateError.invalidInput)
            }
            switch token {
                case "+":
                    stack[stack.count - 2] += tokenValue
                    stack.pop()
                case "-":
                    stack[stack.count - 2] -= tokenValue
                    stack.pop()
                case "*":
                    stack[stack.count - 2] *= tokenValue
                    stack.pop()
                case "/":
                    if tokenValue == 0.0 {
                        // invalid input
                        return throws(CalculateError.invalidInput)
                    }
                    stack[stack.count - 2] /= tokenValue
                    stack.pop()
                default:
                    // invalid input
                    return throws(CalculateError.invalidInput)
            }
        default:
            // invalid input
            return throws(CalculateError.invalidInput)
    }
    if stack.count > 1 {
        // invalid input
        return throws(CalculateError.invalidInput)
    }
    return stack[0]
}

enum TokenType: String {
    case None = ""
    case Number = "Number"
    case Operator = "Operator"
}

```

enum CalculateError: Error {
    case invalidInput
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var token: String = ""
    var isNumber: Bool = false
    var isOperator: Bool = false
    var isParenthesis: Bool = false
    var isError: Bool = false
    var error: CalculateError = CalculateError.invalidInput
    var errorString: String = ""
    var errorStringIndex: Int = 0
    var errorStringIndexEnd: Int = 0
    var errorStringIndexStart: Int = 0
    var errorStringIndexStartEnd: Int = 0
    var errorStringIndexEndStart: Int = 0
    var errorStringIndexEndEnd: Int = 0
    var errorStringIndexStartEndEnd: Int = 0
    var errorStringIndexEndStartEnd: Int = 0
    var errorStringIndexEndEndStart: Int = 0
    var errorStringIndexEndStartEndStart: Int = 0
    var errorStringIndexEndEndStartEnd: Int = 0
    var errorStringIndexEndStartEndEnd: Int = 0
    var errorStringIndexEndEndStartEndEnd: Int = 0
    var errorStringIndexEndStartEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEnd: Int = 0
    var errorStringIndexEndStartEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEnd: Int = 0
    var errorStringIndexEndStartEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0
    var errorStringIndexEndEndStartEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndEndStart: Int = 0

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["(", ")", "+", "-", "*", "/"]
    var stack: [Double] = []
    var operators: [String] = []
    var input: [String] = split(string: string, on: " ")
    var current: Double = 0.0
    var currentOperator: String = ""
    for _, token in input {
        if token == "(" {
            operators.append(token)
        } else if token == ")" {
            if operators.count == 0 {
                throw CalculateError.invalidInput
            } else {
                operators.pop()
            }
        } else if token == "+" || token == "-" {
            if operators.count == 0 || (operators.count > 0 && operators[operators.count - 1] == "*" || operators[operators.count - 1] == "/") {
                operators.append(token)
            } else {
                while (operators.count > 0 && operators[operators.count - 1] != "(") {
                    var operator: String = operators.pop()
                    var operand2: Double = stack.pop()
                    var operand1: Double = stack.pop()
                    switch operator {
                        case "+":
                            stack.append(operand1 + operand2)
                            break
                        case "-":
                            stack.append(operand1 - operand2)
                            break
                        case "*":
                            stack.append(operand1 * operand2)
                            break
                        case "/":
                            stack.append(operand1 / operand2)
                            break
                        default:
                            throw CalculateError.invalidInput
                    }
                }
                operators.append(token)
            }
        } else if token == "*" || token == "/" {
            if operators.count == 0 || operators[operators.count - 1] == "+" || operators[operators.count - 1] == "-" || operators[operators.count - 1] == "*" || operators[operators.count - 1] == "/" {
                operators.append(token)
            } else {
                while (operators.count > 0 && operators[operators.count - 1] != "(") {
                    var operator: String = operators.pop()
                    var operand2: Double = stack.pop()
                    var operand1: Double = stack.pop()
                    switch operator {
                        case "+":
                            stack.append(operand1 + operand2)
                            break
                        case "-":
                            stack.append(operand1 - operand2)
                            break
                        case "*":
                            stack.append(operand1 * operand2)
                            break
                        case "/":
                            stack.append(operand1 / operand2)
                            break
                        default:
                            throw CalculateError.invalidInput
                    }
                }
                operators.append(token)
            }
        } else {
            current = Double(token)
            if (currentOperator == "") {
                currentOperator = token
                continue
            }
            switch currentOperator {
                case "+":
                    stack.append(current)
                    break
                case "-":
                    stack.append(-current)
                    break
                case "*":
                    stack.append(stack.pop() * current)
                    break
                case "/":
                    stack.append(stack.pop() / current)
                    break
                default:
                    throw CalculateError.invalidInput
            }
            currentOperator = token
        }
    }
    while (operators.count > 0) {
        var operator: String = operators.pop()
        var operand2: Double = stack.pop()
        var operand1: Double = stack.pop()
        switch operator {
            case "+":
                stack.append(operand1 + operand2)
                break
            case "-":
                stack.append(operand1 - operand2)
                break
            case "*":
                stack.append(operand1 * operand2)
                break
            case "/":
                stack.append(operand1 / operand2)
                break
            default:
                throw CalculateError.invalidInput
        }
    }
    return stack.pop()
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens: [String] = ["(", ")", "+", "-", "*", "/"]
    var stack: [Double] = []
    var operators: [String] = []
    var input: [String] = split(string: string, on: " ")
    var current: Double = 0.0
    var currentOperator: String = ""
    for _, token in input {
        if token == "(" {
            operators.append(token)
        } else if token == ")" {
            if operators.count == 0 {
                throw CalculateError.invalidInput
            } else {
                operators.pop()
            }
        } else if token == "+" || token == "-" {
            if operators.count == 0 || (operators.count > 0 && operators[operators.count - 1] == "*" || operators[operators.count - 1] == "/") {
                operators.append(token)
            } else {
                while (operators.count > 0 && operators[operators.count - 1] != "(") {
                    var operator: String = operators.pop()
                    var operand2: Double = stack.pop()
                    var operand1: Double = stack.pop()
                    switch operator {
                        case "+":
                            stack.append(operand1 + operand2)
                            break
                        case "-":
                            stack.append(operand1 - operand2)
                            break
                        case "*":
                            stack.append(operand1 * operand2)
                            break
                        case "/":
                            stack.append(operand1 / operand2)
                            break
                        default:
                            throw CalculateError.invalidInput
                    }
                }
                operators.append(token)
            }
        } else if token == "*" || token == "/" {
            if operators.count == 0 || operators[operators.count - 1] == "+" || operators[operators.count - 1] == "-" || operators[operators.count - 1] == "*" || operators[operators.count - 1] == "/" {
                operators.append(token)
            } else {
                while (operators.count > 0 && operators[operators.count - 1] != "(") {
                    var operator: String = operators.pop()
                    var operand2: Double = stack.pop()
                    var operand1: Double = stack.pop()
                    switch operator {
                        case "+":
                            stack.append(operand1 + operand2)
                            break
                        case "-":
                            stack.append(operand1 - operand2)
                            break
                        case "*":
                            stack.append(operand1 * operand2)
                            break
                        case "/":
                            stack.append(operand1 / operand2)
                            break
                        default:
                            throw CalculateError.invalidInput
                    }
                }
                operators.append(token)
            }
        } else {
            current = Double(token)
            if (currentOperator == "") {
                currentOperator = token
                continue
            }
            switch currentOperator {
                case "+":
                    stack.append(current)
                    break
                case "-":
                    stack.append(-current)
                    break
                case "*":
                    stack.append(stack.pop() * current)
                    break
                case "/":
                    stack.append(stack.pop() / current)
                    break
                default:
                    throw CalculateError.invalidInput
            }
            currentOperator = token
        }
    }
    while (operators.count > 0) {
        var operator: String = operators.pop()
        var operand2: Double = stack.pop()
        var operand1: Double = stack.pop()
        switch operator {
            case "+":
                stack.append(operand1 + operand2)
                break
            case "-":
                stack.append(operand1 - operand2)
                break
            case "*":
                stack.append(operand1 * operand2)
                break
            case "/":
                stack.append(operand1 / operand2)
                break
            default:
                throw CalculateError.invalidInput
        }
    }
    return stack.pop()
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = _
    // Split input string to tokens
    tokens = tokens.split(separator: " ")
    // Create stack to store numbers
    var stack = ArrayDeque<Double>()
    // Create stack to store operators
    var operators = ArrayDeque<String>()
    // Create map to store operators precedence
    var precedence = Map<String, Int>()
    precedence["+"] = 1
    precedence["-"] = 1
    precedence["*"] = 2
    precedence["/"] = 2
    // Iterate over tokens
    for token in tokens {
        // If token is number, push to stack
        if let number = token.decimalNumber {
            stack.push(number)
        } else if token == "(" {
            // If token is "(", push to operators stack
            operators.push(token)
        } else if token == ")" {
            // If token is ")", pop operators stack until "("
            while let operator = operators.last {
                if operator == "(" {
                    operators.pop()
                    break
                } else {
                    // Pop numbers from stack until operator
                    let b = stack.pop()!
                    let a = stack.pop()!
                    let result = calculate(a, b, operator)
                    stack.push(result)
                }
            }
        } else {
            // If token is operator, pop operators stack until operator's precedence is greater than or equal to token's precedence
            while let operator = operators.last {
                if let precedence = precedence[operator] {
                    if let nextPrecedence = precedence[token] {
                        if nextPrecedence <= precedence {
                            break
                        }
                    }
                }
                operators.pop()
                let b = stack.pop()!
                let a = stack.pop()!
                let result = calculate(a, b, operator)
                stack.push(result)
            }
            // Push token to operators stack
            operators.push(token)
        }
    }
    // Pop numbers from stack until stack is empty
    while let number = stack.last {
        stack.pop()
    }
    // Return result
    return stack.first
}

func calculate(_ a: Double, _ b: Double, _ operator: String) throws -> Double {
    switch operator {
        case "+":
            return a + b
        case "-":
            return a - b
        case "*":
            return a * b
        case "/":
            return a / b
        default:
            throw(CalculateError.invalidInput)
    }
}

```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens = _
    // Split input string to tokens
    tokens = tokens.split(separator: " ")
    // Create stack to store numbers
    var stack = ArrayDeque<Double>()
    // Create stack to store operators
    var operators = ArrayDeque<String>()
    // Create map to store operators precedence
    var precedence = Map<String, Int>()
    precedence["+"] = 1
    precedence["-"] = 1
    precedence["*"] = 2
    precedence["/"] = 2
    // Iterate over tokens
    for token in tokens {
        // If token is number, push to stack
        if let number = token.decimalNumber {
            stack.push(number)
        } else if token == "(" {
            // If token is "(", push to operators stack
            operators.push(token)
        } else if token == ")" {
            // If token is ")", pop operators stack until "("
            while let operator = operators.last {
                if operator == "(" {
                    operators.pop()
                    break
                } else {
                    // Pop numbers from stack until operator
                    let b = stack.pop()!
                    let a = stack.pop()!
                    let result = calculate(a, b, operator)
                    stack.push(result)
                }
            }
        } else {
            // If token is operator, pop operators stack until operator's precedence is greater than or equal to token's precedence
            while let operator = operators.last {
                if let precedence = precedence[operator] {
                    if let nextPrecedence = precedence[token] {
                        if nextPrecedence <= precedence {
                            break
                        }
                    }
                }
                operators.pop()
                let b = stack.pop()!
                let a = stack.pop()!
                let result = calculate(a, b, operator)
                stack.push(result)
            }
            // Push token to operators stack
            operators.push(token)
        }
    }
    // Pop numbers from stack until stack is empty
    while let number = stack.last {
        stack.pop()
    }
    // Return result
    return stack.first
}

// Calculate a + b
func calculate(_ a: Double, _ b: Double, _ operator: String) throws -> Double {
    switch operator {
        case "+":
            return a + b
        case "-":
            return a - b
        case "*":
            return a * b
        case "/":
            return a / b
        default:
            throw(CalculateError.invalidInput)
    }
}
```

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], workingDirectory: String) -> (String, String) {
    let process = Process(argv: arguments, workingDirectory: workingDirectory)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String, timeout: Double) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory, timeout: timeout)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String, timeout: Double, environmentVariables: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory, timeout: timeout, environmentVariables: environmentVariables)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String, timeout: Double, environmentVariables: [String], environmentVariablesValues: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory, timeout: timeout, environmentVariables: environmentVariables, environmentVariablesValues: environmentVariablesValues)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], workingDirectory: String) -> (String, String) {
    let process = Process(argv: arguments, workingDirectory: workingDirectory)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String, timeout: Double) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory, timeout: timeout)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String, timeout: Double, environmentVariables: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory, timeout: timeout, environmentVariables: environmentVariables)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String, timeout: Double, environmentVariables: [String], environmentVariablesValues: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory, timeout: timeout, environmentVariables: environmentVariables, environmentVariablesValues: environmentVariablesValues)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], workingDirectory: String, timeout: Double, environmentVariables: [String], environmentVariablesValues: [String], environmentVariablesValues2: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, workingDirectory: workingDirectory, timeout: timeout, environmentVariables: environmentVariables, environmentVariablesValues: en<|file_separator|>

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureStdout(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureBoth(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureBothWithExitCode(binary: String, arguments: [String]) -> (String, String, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    return (stdout, stderr, exitCode)
}

func executeAndCaptureBothWithExitCodeAndExitCode(binary: String, arguments: [String]) -> (String, String, Int, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    let exitCode2 = process.exitCode
    return (stdout, stderr, exitCode, exitCode2)
}

func executeAndCaptureBothWithExitCodeAndExitCodeAndExitCode(binary: String, arguments: [String]) -> (String, String, Int, Int, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    let exitCode2 = process.exitCode
    let exitCode3 = process.exitCode
    return (stdout, stderr, exitCode, exitCode2, exitCode3)
}

func executeAndCaptureBothWithExitCodeAndExitCodeAndExitCodeAndExitCode(binary: String, arguments: [String]) -> (String, String, Int, Int, Int, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    let exitCode2 = process.exitCode
    let exitCode3 = process.exitCode
    let exitCode4 = process.exitCode
    return (stdout, stderr, exitCode, exitCode2, exitCode3, exitCode4)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureStdout(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureBoth(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureBothWithExitCode(binary: String, arguments: [String]) -> (String, String, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    return (stdout, stderr, exitCode)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureBothWithExitCodeAndExitCode(binary: String, arguments: [String]) -> (String, String, Int, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    let exitCode2 = process.exitCode
    return (stdout, stderr, exitCode, exitCode2)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureBothWithExitCodeAndExitCodeAndExitCode(binary: String, arguments: [String]) -> (String, String, Int, Int, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    let exitCode2 = process.exitCode
    let exitCode3 = process.exitCode
    return (stdout, stderr, exitCode, exitCode2, exitCode3)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureBothWithExitCodeAndExitCodeAndExitCodeAndExitCode(binary: String, arguments: [String]) -> (String, String, Int, Int, Int, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    let exitCode2 = process.exitCode
    let exitCode3 = process.exitCode
    let exitCode4 = process.exitCode
    return (stdout, stderr, exitCode, exitCode2, exitCode3, exitCode4)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureBothWithExitCodeAndExitCodeAndExitCodeAndExitCodeAndExitCode(binary: String, arguments: [String]) -> (String, String, Int, Int, Int, Int, Int) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    let exitCode = process.exitCode
    let exitCode2 = process.exitCode
    let exit

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureOutput(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeStdout(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    return stdout
}

func executeStderr(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let stderr = process.standardErrorString()
    return stderr
}

func executeExitCode(binary: String, arguments: [String]) -> Int {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    return exitCode
}

func executeExitCodeStdout(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    return stdout
}

func executeExitCodeStderr(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stderr = process.standardErrorString()
    return stderr
}

func executeExitCodeStdoutStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeExitCodeStdoutStderrExitCode(binary: String, arguments: [String]) -> (String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, exitCode)
}

func executeExitCodeStdoutStderrExitCodeStdout(binary: String, arguments: [String]) -> (String, String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, stdout, exitCode)
}

func executeExitCodeStdoutStderrExitCodeStdoutStderr(binary: String, arguments: [String]) -> (String, String, String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, stdout, stderr, exitCode)
}

func executeExitCodeStdoutStderrExitCodeStdoutStderrExitCode(binary: String, arguments: [String]) -> (String, String, String, String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, stdout, stderr, stdout, exitCode)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout.
func executeStdout(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    return stdout
}

// Function to execute binary with arguments and return stderr.
func executeStderr(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let stderr = process.standardErrorString()
    return stderr
}

// Function to execute binary with arguments and return exit code.
func executeExitCode(binary: String, arguments: [String]) -> Int {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    return exitCode
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStdout(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    return stdout
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStderr(binary: String, arguments: [String]) -> String {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stderr = process.standardErrorString()
    return stderr
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStdoutStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStdoutStderrExitCode(binary: String, arguments: [String]) -> (String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, exitCode)
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStdoutStderrExitCodeStdout(binary: String, arguments: [String]) -> (String, String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, stdout, exitCode)
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStdoutStderrExitCodeStdoutStderr(binary: String, arguments: [String]) -> (String, String, String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, stdout, stderr, exitCode)
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStdoutStderrExitCodeStdoutStderrExitCode(binary: String, arguments: [String]) -> (String, String, String, String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, stdout, stderr, stdout, exitCode)
}

// Function to execute binary with arguments and return exit code.
func executeExitCodeStdoutStderrExitCodeStdoutStderrExitCodeStdout(binary: String, arguments: [String]) -> (String, String, String, String, String, String, Int) {
    let process = Process(argv: arguments)
    let exitCode = process.exitCode
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr, stdout, stderr, stdout, stdo<|file_separator|>

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureWithTimeout(binary: String, arguments: [String], timeout: Duration) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureWithTimeoutAndRedirect(binary: String, arguments: [String], timeout: Duration, redirect: String) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureWithTimeoutAndRedirectAndEnvironment(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String]) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureWithTimeoutAndRedirectAndEnvironmentAndInput(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureWithTimeoutAndRedirectAndEnvironmentAndInputAndOutput(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeAndCaptureWithTimeoutAndRedirectAndEnvironmentAndInputAndOutputAndEnvironment(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String], input: String, output: String, environment2: [String]) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureWithTimeout(binary: String, arguments: [String], timeout: Duration) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureWithTimeoutAndRedirect(binary: String, arguments: [String], timeout: Duration, redirect: String) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureWithTimeoutAndRedirectAndEnvironment(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String]) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureWithTimeoutAndRedirectAndEnvironmentAndInput(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureWithTimeoutAndRedirectAndEnvironmentAndInputAndOutput(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureWithTimeoutAndRedirectAndEnvironmentAndInputAndOutputAndEnvironment(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String], input: String, output: String, environment2: [String]) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutput: true, captureStandardError: true)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCaptureWithTimeoutAndRedirectAndEnvironmentAndInputAndOutputAndEnvironmentAndInput(binary: String, arguments: [String], timeout: Duration, redirect: String, environment: [String], input: String, output: String, environment2: [String], input2: String) -> (String, String) {
    let process = Process(argv: arguments, captureStandardOutpu<|file_separator|>

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, output2: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    process.standardOutput2 = output2
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, output2: String, error2: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    process.standardOutput2 = output2
    process.standardError2 = error2
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, output2: String, error2: String, output3: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    process.standardOutput2 = output2
    process.standardError2 = error2
    process.standardOutput3 = output3
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, output2: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    process.standardOutput2 = output2
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, output2: String, error2: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    process.standardOutput2 = output2
    process.standardError2 = error2
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, output2: String, error2: String, output3: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    process.standardOutput = output
    process.standardError = error
    process.standardOutput2 = output2
    process.standardError2 = error2
    process.standardOutput3 = output3
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, output2: String, error2: String, output3: String, error3: String) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardInput = input
    

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String, timeout: Int) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error, timeout: timeout)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String, timeout: Int, inputFile: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error, timeout: timeout, inputFile: inputFile)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String, timeout: Int, inputFile: String, outputFile: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error, timeout: timeout, inputFile: inputFile, outputFile: outputFile)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String]) -> (String, String) {
    let process = Process(argv: arguments, environment: environment)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String, timeout: Int) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error, timeout: timeout)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String, timeout: Int, inputFile: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error, timeout: timeout, inputFile: inputFile)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String, timeout: Int, inputFile: String, outputFile: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error, timeout: timeout, inputFile: inputFile, outputFile: outputFile)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], environment: [String], input: String, output: String, error: String, timeout: Int, inputFile: String, outputFile: String, errorFile: String) -> (String, String) {
    let process = Process(argv: arguments, environment: environment, input: input, output: output, error: error, timeout: timeout, inputFile: inputFile, outputFile: outputFile, errorFile: errorFile)
    let stdout = process.standardOutputString

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launchPath = binary
    process.launch()
    process.standardOutput = ProcessOutput.capture()
    process.standardError = ProcessOutput.capture()
    process.launch()
    let stdout = process.standardOutputString
    let stderr = process.standardErrorString
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture output.
// Returns tuple where first element is stdout and second is stderr.
func executeAndCapture(binary: String, arguments

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeWithStdout(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeWithStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdout(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture stdout and stderr.
// Returns tuple where first element is stdout and second is stderr.
func executeWithStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    process.launch()
    let stdout = process.standardOutputString

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int, outputType: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, outputType: outputType)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int, outputType: String, inputType: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, outputType: outputType, inputType: inputType)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int, outputType: String, inputType: String, outputType2: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, outputType: outputType, inputType: inputType, outputType2: outputType2)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

```swift
// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int, outputType: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, outputType: outputType)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int, outputType: String, inputType: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, outputType: outputType, inputType: inputType)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int, outputType: String, inputType: String, outputType2: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, outputType: outputType, inputType: inputType, outputType2: outputType2)
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], input: String, output: String, error: String, timeout: Int, outputType: String, inputType: String, outputType2: String, inputType2: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, outputType: output

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        let result = cache[key]
        if result == nil {
            result = function(key)
            cache[key] = result
        }
        result
    }
}

func fibonacci(n: Int) -> Int {
    let fib = memoize(func(n: Int) -> Int {
        if n <= 1 {
            return n
        }
        return fibonacci(n - 1) + fibonacci(n - 2)
    })
    return fib(n)
}

func main() {
    let n = 10
    let result = fibonacci(n)
    print("The Fibonacci sequence of $n is: $result")
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        let result = cache[key]
        if result == nil {
            result = function(key)
            cache[key] = result
        }
        result
    }
}

// Function that calculates the Fibonacci sequence using memoization.
func fibonacci(n: Int) -> Int {
    let fib = memoize(func(n: Int) -> Int {
        if n <= 1 {
            return n
        }
        return fibonacci(n - 1) + fibonacci(n - 2)
    })
    return fib(n)
}

// Main function to execute the Fibonacci sequence calculation.
func main() {
    let n = 10
    let result = fibonacci(n)
    print("The Fibonacci sequence of $n is: $result")
}
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        let cached = cache[key]
        if cached != nil {
            cached
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

func fibonacci(_ n: Int) -> Int {
    let fib = memoize(func(n: Int) -> Int {
        if n <= 1 {
            return n
        }
        return fibonacci(n - 1) + fibonacci(n - 2)
    })
    return fib(n)
}

func main() {
    for n in 0..<10 {
        print(fibonacci(n), " ")
    }
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        let cached = cache[key]
        if cached != nil {
            cached
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Fibonacci function using memoization.
func fibonacci(_ n: Int) -> Int {
    let fib = memoize(func(n: Int) -> Int {
        if n <= 1 {
            return n
        }
        return fibonacci(n - 1) + fibonacci(n - 2)
    })
    return fib(n)
}

// Test the memoization function.
func main() {
    for n in 0..<10 {
        print(fibonacci(n), " ")
    }
}

```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}

func length(_ str: String) -> Int {
    return str.length
}

func reverse(_ str: String) -> String {
    return str.reversedString
}

func capitalize(_ str: String) -> String {
    return str.capitalizedString
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}

// Function that takes a string and returns its length.
func length(_ str: String) -> Int {
    return str.length
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its capitalized version.
func capitalize(_ str: String) -> String {
    return str.capitalizedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

// Function that takes a string and returns its reversed version.
func reverse(_ str: String) -> String {
    return str.reversedString
}

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        if let value = cache[key] {
            value
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

func fibonacci(_ n: Int) -> Int {
    let fib = memoize(func(n) -> Int {
        if n <= 1 {
            n
        } else {
            fibonacci(n - 1) + fibonacci(n - 2)
        }
    })
    return fib(n)
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        if let value = cache[key] {
            value
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Fibonacci function that uses memoization to cache the results of expensive computations.
func fibonacci(_ n: Int) -> Int {
    let fib = memoize(func(n) -> Int {
        if n <= 1 {
            n
        } else {
            fibonacci(n - 1) + fibonacci(n - 2)
        }
    })
    return fib(n)
}

// Test the memoization function.
let result = fibonacci(10)
print(result) // Prints 55.
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

func fibonacci(_ n: Int) -> Int {
    let fib = memoize<Int, Int>({ n in
        if n <= 1 {
            n
        } else {
            fibonacci(n - 1) + fibonacci(n - 2)
        }
    })
    return fib(n)
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Fibonacci sequence generator using memoization.
func fibonacci(_ n: Int) -> Int {
    let fib = memoize<Int, Int>({ n in
        if n <= 1 {
            n
        } else {
            fibonacci(n - 1) + fibonacci(n - 2)
        }
    })
    return fib(n)
}

// Test the memoized function
let result = fibonacci(5)
print(result) // Output: 5
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: Map<T, U> = Map()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}

func fibonacci(n: Int) -> Int {
    let fib = memoize(func(n: Int) -> Int {
        if n <= 1 {
            return n
        }
        return fibonacci(n - 1) + fibonacci(n - 2)
    })
    return fib(n)
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: Map<T, U> = Map()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}

// Function that calculates the Fibonacci sequence using memoization.
func fibonacci(n: Int) -> Int {
    let fib = memoize(func(n: Int) -> Int {
        if n <= 1 {
            return n
        }
        return fibonacci(n - 1) + fibonacci(n - 2)
    })
    return fib(n)
}

// Test the memoization function with a large number.
let largeNumber = 35
let result = fibonacci(largeNumber)
print("Fibonacci of $largeNumber: $result")
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: Map<T, U> = Map()
    return { input: input in
        if let cachedValue = cache[input] {
            cachedValue
        } else {
            let result = function(input)
            cache[input] = result
            result
        }
    }
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: Map<T, U> = Map()
    return { input: input in
        if let cachedValue = cache[input] {
            cachedValue
        } else {
            let result = function(input)
            cache[input] = result
            result
        }
    }
}

// Example usage:
let expensiveFunction = memoize(func(x: Int) -> Int { return x * x })
print(expensiveFunction(5)) // Prints 25
print(expensiveFunction(5)) // Prints 25 (cached result)
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

func fibonacci(n: Int) -> Int {
    let fib = memoize({ n in
        if n <= 1 {
            n
        } else {
            fibonacci(n - 1) + fibonacci(n - 2)
        }
    })
    return fib(n)
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    let cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Fibonacci function that computes the nth Fibonacci number using memoization.
func fibonacci(n: Int) -> Int {
    let fib = memoize({ n in
        if n <= 1 {
            n
        } else {
            fibonacci(n - 1) + fibonacci(n - 2)
        }
    })
    return fib(n)
}

// Example usage:
let result = fibonacci(10)
print(result) // Output: 55
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        let cached = cache[key]
        if cached != nil {
            cached
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = Map<T, U>()
    return { key in
        let cached = cache[key]
        if cached != nil {
            cached
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Function that takes a string and returns the length of the string.
let length = memoize<String, Int> { str in
    str.length
}

// Function that takes a string and returns the first character of the string.
let firstCharacter = memoize<String, Char> { str in
    str.firstCharacter
}

// Function that takes a string and returns the last character of the string.
let lastCharacter = memoize<String, Char> { str in
    str.lastCharacter
}

// Function that takes a string and returns the string reversed.
let reverse = memoize<String, String> { str in
    str.reversed
}

// Function that takes a string and returns the string in uppercase.
let toUpperCase = memoize<String, String> { str in
    str.toUpperCase()
}

// Function that takes a string and returns the string in lowercase.
let toLowerCase = memoize<String, String> { str in
    str.toLowerCase()
}

// Function that takes a string and returns the string with the first character capitalized.
let capitalizeFirstCharacter = memoize<String, String> { str in
    str.capitalizeFirstCharacter()
}

// Function that takes a string and returns the string with the last character capitalized.
let capitalizeLastCharacter = memoize<String, String> { str in
    str.capitalizeLastCharacter()
}

// Function that takes a string and returns the string with the first character of each word capitalized.
let capitalizeFirstCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeFirstCharacterOfEachWord()
}

// Function that takes a string and returns the string with the last character of each word capitalized.
let capitalizeLastCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeLastCharacterOfEachWord()
}

// Function that takes a string and returns the string with the first character of each word capitalized.
let capitalizeFirstCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeFirstCharacterOfEachWord()
}

// Function that takes a string and returns the string with the last character of each word capitalized.
let capitalizeLastCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeLastCharacterOfEachWord()
}

// Function that takes a string and returns the string with the first character of each word capitalized.
let capitalizeFirstCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeFirstCharacterOfEachWord()
}

// Function that takes a string and returns the string with the last character of each word capitalized.
let capitalizeLastCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeLastCharacterOfEachWord()
}

// Function that takes a string and returns the string with the first character of each word capitalized.
let capitalizeFirstCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeFirstCharacterOfEachWord()
}

// Function that takes a string and returns the string with the last character of each word capitalized.
let capitalizeLastCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeLastCharacterOfEachWord()
}

// Function that takes a string and returns the string with the first character of each word capitalized.
let capitalizeFirstCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeFirstCharacterOfEachWord()
}

// Function that takes a string and returns the string with the last character of each word capitalized.
let capitalizeLastCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeLastCharacterOfEachWord()
}

// Function that takes a string and returns the string with the first character of each word capitalized.
let capitalizeFirstCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeFirstCharacterOfEachWord()
}

// Function that takes a string and returns the string with the last character of each word capitalized.
let capitalizeLastCharacterOfEachWord = memoize<String, String> { str in
    str.capitalizeLastCharacterOfEachWord()
}

// Function that takes a string and returns the string with the first character of each word capitalized.
let

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var error: Error? = nil
  for i in 0 ..< attempts {
    try {
      return task()
    } catch err {
      error = err
      print("Attempt $i failed with error: \(error)")
    }
  }
  throw error!
}

func main() {
  var result: Int
  try {
    result = retry(5, { 1 + 1 })
  } catch err {
    print("Error: \(err)")
  }
  print("Result: \(result)")
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  var error: Error? = nil
  for i in 0 ..< attempts {
    try {
      return task()
    } catch err {
      error = err
      print("Attempt $i failed with error: \(error)")
    }
  }
  throw error!
}

// Example usage:
func main() {
  var result: Int
  try {
    result = retry(5, { 1 + 1 })
  } catch err {
    print("Error: \(err)")
  }
  print("Result: \(result)")
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            if i == attempts - 1 {
                throw error
            }
            sleep(Duration(seconds: 1))
        }
    }
}

// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            print("Attempt \(i + 1) failed with error: \(error)")
        }
    }
    throw error!("All attempts failed")
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            print("Attempt \(i + 1) failed with error: \(error)")
        }
    }
    throw error!("All attempts failed")
}

// Example usage:
let result = retry(3) {
    // Perform some task that may fail
    throw "Task failed"
}
print("Result: \(result)")
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  for i in 0..<attempts {
    try {
      return task()
    } catch {
      // Do nothing
    }
  }
  throw "Failed after $attempts attempts"
}

func main() {
  var result: Int = 0
  try {
    result = retry(5, {
      print("Attempting to fetch data...")
      // Simulate an error
      throw "Failed to fetch data"
    })
  } catch {
    print("Failed to fetch data after 5 attempts")
  }
  print("Result: $result")
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  for i in 0..<attempts {
    try {
      return task()
    } catch {
      // Do nothing
    }
  }
  throw "Failed after $attempts attempts"
}

// Example usage:
func main() {
  var result: Int = 0
  try {
    result = retry(5, {
      print("Attempting to fetch data...")
      // Simulate an error
      throw "Failed to fetch data"
    })
  } catch {
    print("Failed to fetch data after 5 attempts")
  }
  print("Result: $result")
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  for attempt in 0..<attempts {
    try {
      return task()
    } catch {
      // Do nothing
    }
  }
  throw "Failed after $attempts attempts"
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  for attempt in 0..<attempts {
    try {
      return task()
    } catch {
      // Do nothing
    }
  }
  throw "Failed after $attempts attempts"
}

// Example usage:
let result = retry(3) {
  // Code that may fail
  throw "Failed"
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            print("Attempt \(i + 1) failed with error: \(error)")
        }
    }
    throw error!
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0 ..< attempts {
        try {
            return task()
        } catch err {
            error = err
            print("Attempt \(i + 1) failed with error: \(error)")
        }
    }
    throw error!
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Swift.Exception? = nil
    for i in 0..<attempts {
        try {
            return task()
        } catch exception {
            error = exception
        }
    }
    if let error = error {
        throw error
    } else {
        throw "Unknown error"
    }
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Swift.Exception? = nil
    for i in 0..<attempts {
        try {
            return task()
        } catch exception {
            error = exception
        }
    }
    if let error = error {
        throw error
    } else {
        throw "Unknown error"
    }
}

// Example usage:
let result = retry(3) {
    // Code that may fail
    throw "Test error"
}

print(result) // Prints "Test error"
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0..<attempts {
        try {
            return task()
        } catch (e) {
            error = e
            print("Attempt $i failed with error: $e")
        }
    }
    throw error!
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0..<attempts {
        try {
            return task()
        } catch (e) {
            error = e
            print("Attempt $i failed with error: $e")
        }
    }
    throw error!
}

// Example usage
let result = retry(3) {
    let response = URL.init(string: "https://example.com").read()
    response.statusCode
}
print("Result: $result")
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0..<attempts {
        try {
            return task()
        } catch (e) {
            error = e
            print("Attempt $i failed with error: $e")
        }
    }
    throw error!
}

func main() {
    var result: String = retry(3, {
        let response = try! http.get("https://example.com")
        return String(response.body)
    })
    print(result)
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var error: Error? = nil
    for i in 0..<attempts {
        try {
            return task()
        } catch (e) {
            error = e
            print("Attempt $i failed with error: $e")
        }
    }
    throw error!
}

// Example usage
func main() {
    var result: String = retry(3, {
        let response = try! http.get("https://example.com")
        return String(response.body)
    })
    print(result)
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  for attempt in 0..<attempts {
    try {
      return task()
    } catch {
      // Do nothing
    }
  }
  throw "Failed after $attempts attempts"
}

```swift
// Retry mechanism that retries a task a specified number of times before failing.
func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  for attempt in 0..<attempts {
    try {
      return task()
    } catch {
      // Do nothing
    }
  }
  throw "Failed after $attempts attempts"
}

// Example usage:
let result = retry(3, {
  print("Attempting to fetch data...")
  let response = fetch("https://example.com")
  let data = response.body?.string()
  data.check_non_empty()
})
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._registry[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        return self._registry[type]?.() as? T
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._registry[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        return self._registry[type]?.() as? T
    }
}

// Example usage:
let container = DIContainer()
container.register<IDependency1>(_ type: IDependency1.Type, factory: { IDependency1() })
container.register<IDependency2>(_ type: IDependency2.Type, factory: { IDependency2() })
container.register<IDependency3>(_ type: IDependency3.Type, factory: { IDependency3() })
container.register<IDependency4>(_ type: IDependency4.Type, factory: { IDependency4() })

let dependency1: IDependency1? = container.resolve<IDependency1>()
let dependency2: IDependency2? = container.resolve<IDependency2>()
let dependency3: IDependency3? = container.resolve<IDependency3>()
let dependency4: IDependency4? = container.resolve<IDependency4>()

// Use the resolved dependencies as needed.
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _factories: Map<Type, @escaping () -> Any> = Map()
    
    // Register a factory function for a type.
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._factories[type] = factory
    }
    
    // Resolve a type and return an instance of it.
    func resolve<T>(_ type: T.Type) -> T? {
        let factory = self._factories[type]
        if factory == nil {
            return nil
        }
        return factory() as T?
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _factories: Map<Type, @escaping () -> Any> = Map()
    
    // Register a factory function for a type.
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._factories[type] = factory
    }
    
    // Resolve a type and return an instance of it.
    func resolve<T>(_ type: T.Type) -> T? {
        let factory = self._factories[type]
        if factory == nil {
            return nil
        }
        return factory() as T?
    }
}

// Example usage:
let container = DIContainer()
container.register(SomeInterface.Type, { SomeInterface() })
container.register(SomeDependency.Type, { SomeDependency() })

let someInterface = container.resolve(SomeInterface.Type)
let someDependency = container.resolve(SomeDependency.Type)

// SomeInterface is resolved to SomeInterface instance.
// SomeDependency is resolved to SomeDependency instance.

```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _factories: [Type: @escaping () -> Any] = [:]
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._factories[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        let factory = self._factories[type]
        if factory == nil {
            return nil
        }
        return factory() as T
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _factories: [Type: @escaping () -> Any] = [:]
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._factories[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        let factory = self._factories[type]
        if factory == nil {
            return nil
        }
        return factory() as T
    }
}

// Example usage:
let container = DIContainer()
container.register<IDependencyA>(_ type: IDependencyA.Type, factory: { () -> IDependencyA in
    return IDependencyA()
})
container.register<IDependencyB>(_ type: IDependencyB.Type, factory: { () -> IDependencyB in
    return IDependencyB()
})

let dependencyA = container.resolve<IDependencyA>()
let dependencyB = container.resolve<IDependencyB>()

// Now, dependencyA and dependencyB are instances of IDependencyA and IDependencyB, respectively.
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()

    override func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }

    override func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = _registry[type] else {
            return nil
        }
        return factory() as T?
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()

    override func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }

    override func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = _registry[type] else {
            return nil
        }
        return factory() as T?
    }
}

// Example usage:
let container = DIContainer()
container.register<IDependencyA>(_type: IDependencyA.Type, factory: { IDependencyA() })
container.register<IDependencyB>(_type: IDependencyB.Type, factory: { IDependencyB() })

let dependencyA = container.resolve<IDependencyA>()
let dependencyB = container.resolve<IDependencyB>()

// Dependency A and B are now available.
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard _registry.contains(type) else {
            return nil
        }
        return _registry[type]!() as T?
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()

    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }

    func resolve<T>(_ type: T.Type) -> T? {
        guard _registry.contains(type) else {
            return nil
        }
        return _registry[type]!() as T?
    }
}

// Example usage:
let container = DIContainer()
container.register<ILogger>(_type: ILogger.Type, factory: { () -> ILogger in
    return Logger()
})
let logger = container.resolve<ILogger>()

// Example usage:
let container = DIContainer()
container.register<IRepository>(_type: IRepository.Type, factory: { () -> IRepository in
    return Repository()
})
let repository = container.resolve<IRepository>()
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any> = Map()
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        return _registry[type]?.invoke() as? T
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any> = Map()
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        return _registry[type]?.invoke() as? T
    }
}

// Example usage:
let container = DIContainer()
container.register<ISomeService>(_type: ISomeService.Type, factory: { ISomeService() })
container.register<ISomeDependency>(_type: ISomeDependency.Type, factory: { ISomeDependency() })
container.register<ISomeOtherDependency>(_type: ISomeOtherDependency.Type, factory: { ISomeOtherDependency() })

let someService = container.resolve<ISomeService>()
let someDependency = container.resolve<ISomeDependency>()
let someOtherDependency = container.resolve<ISomeOtherDependency>()

// Use the resolved services and dependencies as needed.
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _factories: Map<Type, @escaping () -> Any> = Map()
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _factories[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        return _factories[type]?.() as? T
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _factories: Map<Type, @escaping () -> Any> = Map()
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _factories[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        return _factories[type]?.() as? T
    }
}

// Example usage:
let container = DIContainer()
container.register<Logger>(Logger())
container.register<Database>(Database())
container.register<Repository>(Repository(database: container.resolve<Database>()))
container.register<Service>(Service(repository: container.resolve<Repository>()))
container.register<Controller>(Controller(service: container.resolve<Service>()))
container.register<App>(App(controller: container.resolve<Controller>()))

let app = container.resolve<App>()
app.run()
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _factories: [Type: @escaping () -> Any] = [:]
    private var _instances: [Type: Any] = [:]

    public init() {
        self.register(Any.Type, func() -> Any { return self })
    }

    public func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._factories[type] = factory
    }

    public func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = self._factories[type] else {
            return nil
        }
        guard let instance = self._instances[type] else {
            let instance = factory()
            self._instances[type] = instance
            return instance
        }
        return instance as T
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _factories: [Type: @escaping () -> Any] = [:]
    private var _instances: [Type: Any] = [:]

    public init() {
        self.register(Any.Type, func() -> Any { return self })
    }

    public func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._factories[type] = factory
    }

    public func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = self._factories[type] else {
            return nil
        }
        guard let instance = self._instances[type] else {
            let instance = factory()
            self._instances[type] = instance
            return instance
        }
        return instance as T
    }
}

// Example usage:
let container = DIContainer()
container.register(SomeService.Type, func() -> SomeService { return SomeService() })
container.register(AnotherService.Type, func() -> AnotherService { return AnotherService() })

let someService = container.resolve<SomeService>()
let anotherService = container.resolve<AnotherService>()
```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _factories: [Type: @escaping () -> Any] = [:]
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _factories[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        let factory = _factories[type]
        if factory == nil {
            return nil
        }
        return factory() as T
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _factories: [Type: @escaping () -> Any] = [:]
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _factories[type] = factory
    }
    
    func resolve<T>(_ type: T.Type) -> T? {
        let factory = _factories[type]
        if factory == nil {
            return nil
        }
        return factory() as T
    }
}

// Example usage:
let container = DIContainer()
container.register<IUserService>(_type: UserService.Type, factory: { () -> IUserService in
    return UserService()
})
container.register<IUserDAO>(_type: UserDAO.Type, factory: { () -> IUserDAO in
    return UserDAO()
})
container.register<IUserAPI>(_type: UserAPI.Type, factory: { () -> IUserAPI in
    return UserAPI(container)
})
container.register<IUserApp>(_type: UserApp.Type, factory: { () -> IUserApp in
    return UserApp(container)
})
let userAPI = container.resolve<IUserAPI>()
let userApp = container.resolve<IUserApp>()
userApp.printUser(userAPI.getUser(1))

```

protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()

    override func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }

    override func resolve<T>(_ type: T.Type) -> T? {
        return _registry[type]?.() as? T
    }
}

```swift
protocol DIContainerProtocol {
    func register<T>(_ type: T.Type, factory: @escaping () -> T)
    func resolve<T>(_ type: T.Type) -> T?
}

// Simple dependency injection (DI) container.
class DIContainer: DIContainerProtocol {
    private var _registry: Map<Type, @escaping () -> Any?> = Map()

    override func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _registry[type] = factory
    }

    override func resolve<T>(_ type: T.Type) -> T? {
        return _registry[type]?.() as? T
    }
}

// Example usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve(SomeService)
let dependency = container.resolve(SomeDependency)

// Usage:
let container = DIContainer()
container.register(SomeService, { SomeService() })
container.register(SomeDependency, { SomeDependency() })
let service = container.resolve

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    public var state: State
    public var transitions: [State: [Event: State]]
    
    public init(state: State) {
        self.state = state
        self.transitions = {}
    }
    
    public func trigger(event: Event) {
        let transition = self.transitions[self.state][event]
        if let new_state = transition {
            self.state = new_state
        }
    }
    
    public func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    public var state: State
    public var transitions: [State: [Event: State]]
    
    public init(state: State) {
        self.state = state
        self.transitions = {}
    }
    
    public func trigger(event: Event) {
        let transition = self.transitions[self.state][event]
        if let new_state = transition {
            self.state = new_state
        }
    }
    
    public func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: 0)
stateMachine.registerTransition(from: 0, to: 1, event: 1)
stateMachine.registerTransition(from: 0, to: 2, event: 2)
stateMachine.registerTransition(from: 1, to: 2, event: 2)

stateMachine.trigger(event: 1)
print(stateMachine.state) // 1
stateMachine.trigger(event: 2)
print(stateMachine.state) // 2
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: Map<State, Map<Event, State>> = Map<State, Map<Event, State>>()
    
    init(state: State) {
        self.state = state
    }
    
    var state: State {
        get { return self.state }
        set { self.state = $0 }
    }
    
    func trigger(event: Event) {
        let transition = self.transitions[self.state]?.get(event)
        if let transition = transition {
            self.state = transition
        } else {
            fatalError("No transition for event $event from state $state")
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from]?.set(event, to) ?? { self.transitions[from] = Map<Event, State>() }
    }
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: Map<State, Map<Event, State>> = Map<State, Map<Event, State>>()
    
    init(state: State) {
        self.state = state
    }
    
    var state: State {
        get { return self.state }
        set { self.state = $0 }
    }
    
    func trigger(event: Event) {
        let transition = self.transitions[self.state]?.get(event)
        if let transition = transition {
            self.state = transition
        } else {
            fatalError("No transition for event $event from state $state")
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from]?.set(event, to) ?? { self.transitions[from] = Map<Event, State>() }
    }
}

// Example usage:
let stateMachine = StateMachine<String, String>()
stateMachine.registerTransition("A", "B", "Event1")
stateMachine.registerTransition("B", "C", "Event2")
stateMachine.trigger("Event1")
print(stateMachine.state) // Output: "B"
stateMachine.trigger("Event2")
print(stateMachine.state) // Output: "C"
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Initialize state machine with initial state.
    init(state: State) {
        self.state = state
    }
    
    // Trigger event.
    func trigger(event: Event) {
        let nextState = self.transitions[self.state][event]
        if let nextState = nextState {
            self.state = nextState
        }
    }
    
    // Register transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Initialize state machine with initial state.
    init(state: State) {
        self.state = state
    }
    
    // Trigger event.
    func trigger(event: Event) {
        let nextState = self.transitions[self.state][event]
        if let nextState = nextState {
            self.state = nextState
        }
    }
    
    // Register transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Initialize state machine with initial state.
    init(state: State) {
        self.state = state
    }
    
    // Trigger event.
    func trigger(event: Event) {
        let nextState = self.transitions[self.state][event]
        if let nextState = nextState {
            self.state = nextState
        }
    }
    
    // Register transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Initialize state machine with initial state.
    init(state: State) {
        self.state = state
    }
    
    // Trigger event.
    func trigger(event: Event) {
        let nextState = self.transitions[self.state][event]
        if let nextState = nextState {
            self.state = nextState
        }
    }
    
    // Register transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // State machine state.
    override var state: State {
        return self.state
    }
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Transition map.
    private var transitions: [State: [Event: State]] = [:]
    
    // Initialize state machine with initial state.
    init(state: State) {
        self.state = state
    }
    
    // Trigger event.
    func trigger(event: Event) {
        let nextState = self.transitions[self.state][event]
        if let nextState = nextState {
            self.state = nextState
        }
    }
    
    // Register transition between states.
    func registerTransition(from

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State
    // Map of states to their transitions.
    private var transitions: Map<State, Map<Event, State>> = Map()
    // Map of states to their events.
    private var events: Map<State, Set<Event>> = Map()
    // Set of all events.
    private var allEvents: Set<Event>
    // Set of all states.
    private var allStates: Set<State>
    // Set of all states reachable from a given state.
    private var reachableStates: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEvents: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesFrom: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsFrom: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesTo: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsTo: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesFromTo: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsFromTo: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesToFrom: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsToFrom: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesFromFrom: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsFromFrom: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesToFromFrom: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsToFromFrom: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesFromToFrom: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsFromToFrom: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesToTo: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsToTo: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesFromToTo: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsFromToTo: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesToToTo: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsToToTo: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesFromToToTo: Map<State, Set<State>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableEventsFromToToTo: Map<State, Set<Event>> = Map()
    // Set of all states that can be reached from a given state.
    private var reachableStatesFromToToToFrom: Map<State, Set<State>> =

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    public var state: State
    public var transitions: [State: [Event: State]] = {}
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        let nextState = self.transitions[self.state][event]
        if nextState != nil {
            self.state = nextState
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    public var state: State
    public var transitions: [State: [Event: State]] = {}
    
    init(state: State) {
        self.state = state
    }
    
    func trigger(event: Event) {
        let nextState = self.transitions[self.state][event]
        if nextState != nil {
            self.state = nextState
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: State.A)
stateMachine.registerTransition(from: State.A, to: State.B, event: Event.B1)
stateMachine.registerTransition(from: State.B, to: State.C, event: Event.C1)
stateMachine.registerTransition(from: State.C, to: State.A, event: Event.A1)
stateMachine.trigger(event: Event.B1)
stateMachine.trigger(event: Event.C1)
stateMachine.trigger(event: Event.A1)
print(stateMachine.state) // Prints "A"
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    // Initial state of the machine.
    private var _state: State
    // Set of all states.
    private var _states: Set<State>
    // Set of all events.
    private var _events: Set<Event>
    // Set of all transitions.
    private var _transitions: Set<Transition<State, Event>>
    // Map of states to their transitions.
    private var _stateToTransitions: Map<State, Set<Transition<State, Event>>>
    
    // Creates a new state machine with the given initial state.
    init(state: State) {
        self._state = state
        self._states = Set<State>()
        self._events = Set<Event>()
        self._transitions = Set<Transition<State, Event>>()
        self._stateToTransitions = Map<State, Set<Transition<State, Event>>>()
    }
    
    // Returns the current state of the machine.
    override var state: State {
        return self._state
    }
    
    // Sets the current state of the machine.
    override var state: State {
        set self._state = value
    }
    
    // Registers a new transition between two states.
    func registerTransition(from: State, to: State, event: Event) {
        if let transitions = self._stateToTransitions[from] {
            if let transition = transitions.firstWhere { $0.event == event } {
                return
            }
        }
        let transition = Transition(from: from, to: to, event: event)
        self._transitions.insert(transition)
        if let transitions = self._stateToTransitions[from] {
            transitions.insert(transition)
        } else {
            self._stateToTransitions[from] = Set([transition])
        }
    }
    
    // Triggers an event on the machine.
    override func trigger(event: Event) {
        if let transitions = self._stateToTransitions[self._state] {
            for transition in transitions {
                if transition.event == event {
                    self._state = transition.to
                    return
                }
            }
        }
        fatalError("Invalid event: \(event)")
    }
}

class Transition<State: Hashable, Event: Hashable>: Equatable {
    associatedtype State
    associatedtype Event
    
    // The state the transition starts from.
    public var from: State
    // The state the transition ends at.
    public var to: State
    // The event that triggers the transition.
    public var event: Event
    
    // Creates a new transition between two states.
    init(from: State, to: State, event: Event) {
        self.from = from
        self.to = to
        self.event = event
    }
    
    // Returns a string representation of the transition.
    override func description() -> String {
        return "Transition from \(from) to \(to) on event \(event)"
    }
    
    // Returns whether two transitions are equal.
    override func equ<|fim_suffix|>
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    // Initial state of the machine.
    private var _state: State
    // Set of all states.
    private var _states: Set<State>
    // Set of all events.
    private var _events: Set<Event>
    // Set of all transitions.
    private var _transitions: Set<Transition<State, Event>>
    // Map of states to their transitions.
    private var _stateToTransitions: Map<State, Set<Transition<State, Event>>>
    
    // Creates a new state machine with the given initial state.
    init(state: State) {
        self._state = state
        self._states = Set<State>()
        self._events = Set<Event>()
        self._transitions = Set<Transition<State, Event>>()
        self._stateToTransitions = Map<State, Set<Transition<State, Event>>>()
    }
    
    // Returns the current state of the machine.
    override var state: State {
        return self._state
    }
    
    // Sets the current state of the machine.
    override var state: State {
        set self._state = value
    }
    
    // Registers a new transition between two states.
    func registerTransition(from: State, to: State, event: Event) {
        if let transitions = self._stateToTransitions[from] {
            if let transition = transitions.firstWhere { $0.event == event } {
                return
            }
        }
        let transition = Transition(from: from, to: to, event: event)
        self._transitions.insert(transition)
        if let transitions = self._stateToTransitions[from] {
            transitions.insert(transition)
        } else {
            self._stateToTransitions[from] = Set([transition])
        }
    }
    
    // Triggers an event on the machine.
    override func trigger(event: Event) {
        if let transitions = self._stateToTransitions[self._state] {
            for transition in transitions {
                if transition.event == event {
                    self._state = transition.to
                    return
                }
            }
        }
        fatalError("Invalid event: \(event)")
    }
}

// Transition between states.
class Transition<State: Hashable, Event: Hashable>: Equatable {
    associatedtype State
    associatedtype Event
    
    // The state the transition starts from.
    public var from: State
    // The state the transition ends at.
    public var to: State
    // The event that triggers the transition.
    public var event: Event
    
    // Creates a new transition between two states.
    init(from: State, to: State, event: Event) {
        self.from = from
        self.to = to
        self.event = event
    }
    
    // Returns a string representation of the transition.
    override func description() -> String {
        return "Transition from \(from) to \(to) on event \(event)"
    }
    
    // Returns whether two transitions are equal.
    override func equ<|fim_suffix|>
}

// Example usage:
let stateMachine = StateMachine<String, String>()
stateMachine.registerTransition("A", "B", "event1")
stateMachine.registerTransition("B", "C", "event2")
stateMachine.trigger("event1")
print(stateMachine.state) // prints "B"
stateMachine.trigger("event2")
print(stateMachine.state) // prints "C"
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: Map<State, Map<Event, State>>
    
    init(state: State) {
        self.state = state
        self.transitions = Map<State, Map<Event, State>>()
    }
    
    override var state: State {
        return self.state
    }
    
    override func trigger(event: Event) {
        let nextState = self.transitions[self.state]?.[event]
        if let nextState = nextState {
            self.state = nextState
        } else {
            fatalError("Invalid transition")
        }
    }
    
    override func registerTransition(from: State, to: State, event: Event) {
        let transitions = self.transitions[from] ?? Map<Event, State>()
        transitions[event] = to
        self.transitions[from] = transitions
    }
}

enum MyState: Hashable {
    case state1
    case state2
}

enum MyEvent: Hashable {
    case event1
    case event2
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: Map<State, Map<Event, State>>
    
    init(state: State) {
        self.state = state
        self.transitions = Map<State, Map<Event, State>>()
    }
    
    override var state: State {
        return self.state
    }
    
    override func trigger(event: Event) {
        let nextState = self.transitions[self.state]?.[event]
        if let nextState = nextState {
            self.state = nextState
        } else {
            fatalError("Invalid transition")
        }
    }
    
    override func registerTransition(from: State, to: State, event: Event) {
        let transitions = self.transitions[from] ?? Map<Event, State>()
        transitions[event] = to
        self.transitions[from] = transitions
    }
}

// Example usage:

// Define states and events
enum MyState: Hashable {
    case state1
    case state2
}

enum MyEvent: Hashable {
    case event1
    case event2
}

// Create a state machine with initial state
let stateMachine = StateMachine<MyState, MyEvent>(state: MyState.state1)

// Register transitions
stateMachine.registerTransition(from: MyState.state1, to: MyState.state2, event: MyEvent.event1)
stateMachine.registerTransition(from: MyState.state2, to: MyState.state1, event: MyEvent.event2)

// Trigger events to move the state machine
stateMachine.trigger(event: MyEvent.event1) // Moves to state2
stateMachine.trigger(event: MyEvent.event2) // Moves to state1

// Access the current state
print("Current state:", stateMachine.state) // Prints "Current state: state1"
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: Map<State, Map<Event, State>> = Map<State, Map<Event, State>>()
    
    init(state: State) {
        self.state = state
    }
    
    var state: State {
        get { return self.state }
        set { self.state = $0 }
    }
    
    func trigger(event: Event) {
        let nextState = self.transitions[self.state]?.get(event)
        if let nextState = nextState {
            self.state = nextState
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from]?.set(event, to) ?? {
            self.transitions[from] = Map<Event, State>()
            self.transitions[from]?.set(event, to)
        }
    }
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: Map<State, Map<Event, State>> = Map<State, Map<Event, State>>()
    
    init(state: State) {
        self.state = state
    }
    
    var state: State {
        get { return self.state }
        set { self.state = $0 }
    }
    
    func trigger(event: Event) {
        let nextState = self.transitions[self.state]?.get(event)
        if let nextState = nextState {
            self.state = nextState
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from]?.set(event, to) ?? {
            self.transitions[from] = Map<Event, State>()
            self.transitions[from]?.set(event, to)
        }
    }
}
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State
    // Custom transitions between states.
    var transitions: [State: [Event: State]]
    // Transition from one state to another.
    func trigger(event: Event) {
        guard let transition = transitions[state, event] else {
            fatalError("No transition from state \(state) to event \(event)")
        }
        state = transition
    }
    // Register custom transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from][event] = to
    }
}

class ExampleStateMachine: StateMachineProtocol {
    override var state: State
    var transitions: [State: [Event: State]]
    init(state: State) {
        self.state = state
        transitions = [:]
    }
    func trigger(event: Event) {
        guard let transition = transitions[state, event] else {
            fatalError("No transition from state \(state) to event \(event)")
        }
        state = transition
    }
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from][event] = to
    }
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State
    // Custom transitions between states.
    var transitions: [State: [Event: State]]
    // Transition from one state to another.
    func trigger(event: Event) {
        guard let transition = transitions[state, event] else {
            fatalError("No transition from state \(state) to event \(event)")
        }
        state = transition
    }
    // Register custom transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from][event] = to
    }
}

// Example usage:
class ExampleStateMachine: StateMachineProtocol {
    override var state: State
    var transitions: [State: [Event: State]]
    init(state: State) {
        self.state = state
        transitions = [:]
    }
    func trigger(event: Event) {
        guard let transition = transitions[state, event] else {
            fatalError("No transition from state \(state) to event \(event)")
        }
        state = transition
    }
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from][event] = to
    }
}

// Example usage:
let stateMachine = ExampleStateMachine(state: State.state1)
stateMachine.registerTransition(from: State.state1, to: State.state2, event: Event.event1)
stateMachine.trigger(event: Event.event1)
print(stateMachine.state) // Prints: state2
```

protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: [State: [Event: State]]
    
    init(state: State) {
        self.state = state
        self.transitions = {}
    }
    
    var state: State { get return self.state }
    
    func trigger(event: Event) {
        guard let transition = self.transitions[self.state][event] else {
            fatalError("No transition for state: " + self.state + " and event: " + event)
        }
        self.state = transition
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        guard let transitions = self.transitions[from] else {
            self.transitions[from] = {}
        }
        self.transitions[from][event] = to
    }
}

```swift
protocol StateMachineProtocol {
    associatedtype State: Hashable
    associatedtype Event: Hashable
    init(state: State)
    var state: State { get }
    func trigger(event: Event)
    func registerTransition(from: State, to: State, event: Event)
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    associatedtype State
    associatedtype Event
    
    private var state: State
    private var transitions: [State: [Event: State]]
    
    init(state: State) {
        self.state = state
        self.transitions = {}
    }
    
    var state: State { get return self.state }
    
    func trigger(event: Event) {
        guard let transition = self.transitions[self.state][event] else {
            fatalError("No transition for state: " + self.state + " and event: " + event)
        }
        self.state = transition
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        guard let transitions = self.transitions[from] else {
            self.transitions[from] = {}
        }
        self.transitions[from][event] = to
    }
}
```

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node = queue.popFirst() {
            totalSize += node.totalSize
            queue.append(node.contents)
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let node = queue.popFirst() {
            filesCount += node.filesCount
            queue.append(node.contents)
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        var queue = [self]
        while let node = queue.popFirst() {
            treeDepth = max(treeDepth, node.treeDepth)
            queue.append(node.contents)
        }
        return treeDepth
    }
}

class FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node = queue.popFirst() {
            totalSize += node.totalSize
            queue.append(node.contents)
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let node = queue.popFirst() {
            filesCount += node.filesCount
            queue.append(node.contents)
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        var queue = [self]
        while let node = queue.popFirst() {
            treeDepth = max(treeDepth, node.treeDepth)
            queue.append(node.contents)
        }
        return treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
class FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

    var filesCount: Int { get } {
        return self.filesCount
    }

    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// File system manager that calculates total size of all files in file system, files count and file system tree depth.
extension FileSystemManager: FileSystemInfo {

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node in queue {
            totalSize += node.size
            queue = node.contents
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let node in queue {
            if node is file {
                filesCount += 1
            }
            queue = node.contents
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var depth = 0
        var queue = [self]
        while let node in queue {
            depth += 1
            queue = node.contents
        }
        return depth
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node in queue {
            totalSize += node.size
            queue = node.contents
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let node in queue {
            if node is file {
                filesCount += 1
            }
            queue = node.contents
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var depth = 0
        var queue = [self]
        while let node in queue {
            depth += 1
            queue = node.contents
        }
        return depth
    }
}

// File system manager that calculates metadata for file system nodes.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node in queue {
            totalSize += node.size
            queue = node.contents
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let node in queue {
            if node is file {
                filesCount += 1
            }
            queue = node.contents
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var depth = 0
        var queue = [self]
        while let node in queue {
            depth += 1
            queue = node.contents
        }
        return depth
    }
}

// File system manager that calculates metadata for file system nodes.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node in queue {
            totalSize += node.size
            queue = node.contents
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let node in queue {
            if node is file {
                filesCount += 1
            }
            queue = node.contents
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var depth = 0
        var queue = [self]
        while let node in queue {
            depth += 1
            queue = node.contents
        }
        return depth
    }
}

// File system manager that calculates metadata for file system nodes.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node in queue {
            totalSize += node.size
            queue = node.contents
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let node in queue {
            if node is file {
                filesCount += 1
            }
            queue = node.contents
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var depth = 0
        var queue = [self]
        while let node in queue {
            depth += 1
            queue = node.contents
        }
        return depth
    }
}

// File system manager that calculates metadata for file system nodes.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while let node in queue {
            totalSize += node.size
            queue = node.contents
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while let

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                for content in contents {
                    size += content.totalSize
                }
                size
            }
        }
    }
    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                for content in contents {
                    count += content.filesCount
                }
            }
        }
        count
    }
    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                for content in contents {
                    depth = max(depth, content.treeDepth)
                }
                depth + 1
            }
        }
    }
}

class FileSystemManager {
    var root: FileSystemNode
    var info: FileSystemInfo
    init(root: FileSystemNode) {
        self.root = root
        self.info = root
    }
    func calculateInfo() {
        self.info = root
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                for content in contents {
                    size += content.totalSize
                }
                size
            }
        }
    }
    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                for content in contents {
                    count += content.filesCount
                }
            }
        }
        count
    }
    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                for content in contents {
                    depth = max(depth, content.treeDepth)
                }
                depth + 1
            }
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    var root: FileSystemNode
    var info: FileSystemInfo
    init(root: FileSystemNode) {
        self.root = root
        self.info = root
    }
    func calculateInfo() {
        self.info = root
    }
}

// File system manager instance.
var fileSystemManager = FileSystemManager(root: directory(name: "root", contents: [file(name: "file1", size: 100), file(name: "file2", size: 200)]))

// Calculate total size of all files in file system.
print(fileSystemManager.info.totalSize) // 300

// Calculate files count in file system.
print(fileSystemManager.info.filesCount) // 2

// Calculate file system tree depth.
print(fileSystemManager.info.treeDepth) // 1
```

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

class FileSystemManager: FileSystemInfo {
    var _root: FileSystemNode
    var _totalSize: Int = 0
    var _filesCount: Int = 0
    var _treeDepth: Int = 0

    init(root: FileSystemNode) {
        self._root = root
    }

    override var totalSize: Int {
        self._totalSize = 0
        self._calculateTotalSize(self._root)
        return self._totalSize
    }

    override var filesCount: Int {
        self._filesCount = 0
        self._calculateFilesCount(self._root)
        return self._filesCount
    }

    override var treeDepth: Int {
        self._treeDepth = 0
        self._calculateTreeDepth(self._root, 1)
        return self._treeDepth
    }

    private func _calculateTotalSize(_ node: FileSystemNode) {
        if let file = node as? File {
            self._totalSize += file.size
        } else if let dir = node as? Directory {
            for child in dir.contents {
                self._calculateTotalSize(child)
            }
        }
    }

    private func _calculateFilesCount(_ node: FileSystemNode) {
        if let file = node as? File {
            self._filesCount += 1
        } else if let dir = node as? Directory {
            for child in dir.contents {
                self._calculateFilesCount(child)
            }
        }
    }

    private func _calculateTreeDepth(_ node: FileSystemNode, depth: Int) {
        if let file = node as? File {
            if depth > self._treeDepth {
                self._treeDepth = depth
            }
        } else if let dir = node as? Directory {
            for child in dir.contents {
                self._calculateTreeDepth(child, depth + 1)
            }
        }
    }
}

class File: FileSystemNode {
    var name: String
    var size: Int

    init(name: String, size: Int) {
        self.name = name
        self.size = size
    }
}

class Directory: FileSystemNode {
    var name: String
    var contents: [FileSystemNode]

    init(name: String, contents: [FileSystemNode]) {
        self.name = name
        self.contents = contents
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager: FileSystemInfo {
    var _root: FileSystemNode
    var _totalSize: Int = 0
    var _filesCount: Int = 0
    var _treeDepth: Int = 0

    init(root: FileSystemNode) {
        self._root = root
    }

    override var totalSize: Int {
        self._totalSize = 0
        self._calculateTotalSize(self._root)
        return self._totalSize
    }

    override var filesCount: Int {
        self._filesCount = 0
        self._calculateFilesCount(self._root)
        return self._filesCount
    }

    override var treeDepth: Int {
        self._treeDepth = 0
        self._calculateTreeDepth(self._root, 1)
        return self._treeDepth
    }

    private func _calculateTotalSize(_ node: FileSystemNode) {
        if let file = node as? File {
            self._totalSize += file.size
        } else if let dir = node as? Directory {
            for child in dir.contents {
                self._calculateTotalSize(child)
            }
        }
    }

    private func _calculateFilesCount(_ node: FileSystemNode) {
        if let file = node as? File {
            self._filesCount += 1
        } else if let dir = node as? Directory {
            for child in dir.contents {
                self._calculateFilesCount(child)
            }
        }
    }

    private func _calculateTreeDepth(_ node: FileSystemNode, depth: Int) {
        if let file = node as? File {
            if depth > self._treeDepth {
                self._treeDepth = depth
            }
        } else if let dir = node as? Directory {
            for child in dir.contents {
                self._calculateTreeDepth(child, depth + 1)
            }
        }
    }
}

// File implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class File: FileSystemNode {
    var name: String
    var size: Int

    init(name: String, size: Int) {
        self.name = name
        self.size = size
    }
}

// Directory implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class Directory: FileSystemNode {
    var name: String
    var contents: [FileSystemNode]

    init(name: String, contents: [FileSystemNode]) {
        self.name = name
        self.contents = contents
    }
}

// Example usage.
let rootDirectory = Directory(
    name: "root",
    contents: [
        File(name: "file1.txt", size: 100),
        Directory(
            name: "subdirectory",
            contents: [
                File(name: "file2.txt", size: 200),
                File(name: "file3.txt", size: 300),
                Directory(
                    name: "subsubdirectory",
                    contents: [
                        File(name: "file4.txt", size: 400),
                        File(name: "file5.txt", size: 500),
                    ]
                )
            ]
        )
    ]
)

let fileSystemManager = FileSystemManager(rootDirectory)

print("Total size:", fileSystemManager.totalSize)
print("Files count:", fileSystemManager.filesCount)
print("Tree depth:", fileSystemManager.treeDepth)
```

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        if let FileSystemNode.file(name: _, size: _) in self {
            totalSize += size
        } else {
            totalSize += self.contents.map { it.totalSize }.sum
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        if let FileSystemNode.file(name: _, size: _) in self {
            filesCount += 1
        } else {
            filesCount += self.contents.map { it.filesCount }.sum
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        if let FileSystemNode.file(name: _, size: _) in self {
            treeDepth = 1
        } else {
            treeDepth = 1 + self.contents.map { it.treeDepth }.max
        }
        return treeDepth
    }
}

extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        if let FileSystemNode.file(name: _, size: _) in self {
            totalSize += size
        } else {
            totalSize += self.contents.map { it.totalSize }.sum
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        if let FileSystemNode.file(name: _, size: _) in self {
            filesCount += 1
        } else {
            filesCount += self.contents.map { it.filesCount }.sum
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        if let FileSystemNode.file(name: _, size: _) in self {
            treeDepth = 1
        } else {
            treeDepth = 1 + self.contents.map { it.treeDepth }.max
        }
        return treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return self.root.totalSize
    }

    var filesCount: Int { get } {
        return self.root.filesCount
    }

    var treeDepth: Int { get } {
        return self.root.treeDepth
    }
}

// Calculate total size of all files in file system, files count and file system tree depth.

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        switch self {
            case file(size: size):
                totalSize = size
            case directory(contents: contents):
                for content in contents {
                    totalSize += content.totalSize
                }
        }
        return totalSize
    }
    var filesCount: Int { get } {
        var filesCount = 0
        switch self {
            case file():
                filesCount = 1
            case directory(contents: contents):
                for content in contents {
                    filesCount += content.filesCount
                }
        }
        return filesCount
    }
    var treeDepth: Int { get } {
        var treeDepth = 0
        switch self {
            case file():
                treeDepth = 1
            case directory(contents: contents):
                for content in contents {
                    treeDepth = max(treeDepth, content.treeDepth)
                }
                treeDepth += 1
        }
        return treeDepth
    }
}

class FileSystemManager {
    var root: FileSystemNode
    var totalSize: Int { get } {
        return root.totalSize
    }
    var filesCount: Int { get } {
        return root.filesCount
    }
    var treeDepth: Int { get } {
        return root.treeDepth
    }
}

extension FileSystemManager {
    init(root: FileSystemNode) {
        self.root = root
    }
    init(root: String) {
        self.root = directory(name: root)
    }
}

extension FileSystemManager {
    init(root: String, contents: [String]) {
        self.root = directory(name: root, contents: contents)
    }
}

extension FileSystemManager {
    init(root: String, contents: [String], size: Int) {
        self.root = directory(name: root, contents: contents, size: size)
    }
}

extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount)
    }
}

extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int, treeDepth: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount, treeDepth: treeDepth)
    }
}

extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int, treeDepth: Int, totalSize: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount, treeDepth: treeDepth, totalSize: totalSize)
    }
}

extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int, treeDepth: Int, totalSize: Int, filesCount: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount, treeDepth: treeDepth, totalSize: totalSize, filesCount: filesCount)
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        switch self {
            case file(size: size):
                totalSize = size
            case directory(contents: contents):
                for content in contents {
                    totalSize += content.totalSize
                }
        }
        return totalSize
    }
    var filesCount: Int { get } {
        var filesCount = 0
        switch self {
            case file():
                filesCount = 1
            case directory(contents: contents):
                for content in contents {
                    filesCount += content.filesCount
                }
        }
        return filesCount
    }
    var treeDepth: Int { get } {
        var treeDepth = 0
        switch self {
            case file():
                treeDepth = 1
            case directory(contents: contents):
                for content in contents {
                    treeDepth = max(treeDepth, content.treeDepth)
                }
                treeDepth += 1
        }
        return treeDepth
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    var root: FileSystemNode
    var totalSize: Int { get } {
        return root.totalSize
    }
    var filesCount: Int { get } {
        return root.filesCount
    }
    var treeDepth: Int { get } {
        return root.treeDepth
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    init(root: FileSystemNode) {
        self.root = root
    }
    init(root: String) {
        self.root = directory(name: root)
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    init(root: String, contents: [String]) {
        self.root = directory(name: root, contents: contents)
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    init(root: String, contents: [String], size: Int) {
        self.root = directory(name: root, contents: contents, size: size)
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount)
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int, treeDepth: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount, treeDepth: treeDepth)
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int, treeDepth: Int, totalSize: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount, treeDepth: treeDepth, totalSize: totalSize)
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    init(root: String, contents: [String], size: Int, filesCount: Int, treeDepth: Int, totalSize: Int, filesCount: Int) {
        self.root = directory(name: root, contents: contents, size: size, filesCount: filesCount, treeDepth: treeDepth, totalSize: totalSize, filesCount: filesCount)
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while (let node = queue.popFirst()) {
            totalSize += node.totalSize
            queue.pushBackAll(node.contents)
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while (let node = queue.popFirst()) {
            filesCount += node.filesCount
            queue.pushBackAll(node.contents)
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        var queue = [self]
        while (let node = queue.popFirst()) {
            treeDepth = max(treeDepth, node.treeDepth)
            queue.pushBackAll(node.contents)
        }
        return treeDepth
    }
}

class FileSystemManager {
    var root: FileSystemNode
    var totalSize: Int { get } {
        return root.totalSize
    }

    var filesCount: Int { get } {
        return root.filesCount
    }

    var treeDepth: Int { get } {
        return root.treeDepth
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        var queue = [self]
        while (let node = queue.popFirst()) {
            totalSize += node.totalSize
            queue.pushBackAll(node.contents)
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        var queue = [self]
        while (let node = queue.popFirst()) {
            filesCount += node.filesCount
            queue.pushBackAll(node.contents)
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        var queue = [self]
        while (let node = queue.popFirst()) {
            treeDepth = max(treeDepth, node.treeDepth)
            queue.pushBackAll(node.contents)
        }
        return treeDepth
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    var root: FileSystemNode
    var totalSize: Int { get } {
        return root.totalSize
    }

    var filesCount: Int { get } {
        return root.filesCount
    }

    var treeDepth: Int { get } {
        return root.treeDepth
    }
}

// File system manager instance.
var fileSystemManager = FileSystemManager(root: fileSystem.root)
```

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        for node in self {
            totalSize += node.totalSize
        }
        return totalSize
    }
    var filesCount: Int { get } {
        var filesCount = 0
        for node in self {
            filesCount += node.filesCount
        }
        return filesCount
    }
    var treeDepth: Int { get } {
        var treeDepth = 0
        for node in self {
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return treeDepth
    }
}

extension FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }
    var filesCount: Int { get } {
        return self.filesCount
    }
    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

extension FileSystemNode {
    var totalSize: Int { get } {
        var totalSize = 0
        for node in self {
            totalSize += node.totalSize
        }
        return totalSize
    }
}

extension FileSystemNode {
    var filesCount: Int { get } {
        var filesCount = 0
        for node in self {
            filesCount += node.filesCount
        }
        return filesCount
    }
}

extension FileSystemNode {
    var treeDepth: Int { get } {
        var treeDepth = 0
        for node in self {
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return treeDepth
    }
}

extension FileSystemNode {
    var info: FileSystemInfo { get } {
        var totalSize = 0
        var filesCount = 0
        var treeDepth = 0
        for node in self {
            totalSize += node.totalSize
            filesCount += node.filesCount
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return {
            totalSize: totalSize,
            filesCount: filesCount,
            treeDepth: treeDepth
        }
    }
}

extension FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }
}

extension FileSystemInfo {
    var filesCount: Int { get } {
        return self.filesCount
    }
}

extension FileSystemInfo {
    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

extension FileSystemInfo {
    var info: FileSystemInfo { get } {
        return self
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var totalSize = 0
        for node in self {
            totalSize += node.totalSize
        }
        return totalSize
    }
    var filesCount: Int { get } {
        var filesCount = 0
        for node in self {
            filesCount += node.filesCount
        }
        return filesCount
    }
    var treeDepth: Int { get } {
        var treeDepth = 0
        for node in self {
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return treeDepth
    }
}

extension FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }
    var filesCount: Int { get } {
        return self.filesCount
    }
    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// Calculate total size of all files in file system.
extension FileSystemNode {
    var totalSize: Int { get } {
        var totalSize = 0
        for node in self {
            totalSize += node.totalSize
        }
        return totalSize
    }
}

// Calculate files count in file system.
extension FileSystemNode {
    var filesCount: Int { get } {
        var filesCount = 0
        for node in self {
            filesCount += node.filesCount
        }
        return filesCount
    }
}

// Calculate file system tree depth.
extension FileSystemNode {
    var treeDepth: Int { get } {
        var treeDepth = 0
        for node in self {
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return treeDepth
    }
}

// Calculate file system info.
extension FileSystemNode {
    var info: FileSystemInfo { get } {
        var totalSize = 0
        var filesCount = 0
        var treeDepth = 0
        for node in self {
            totalSize += node.totalSize
            filesCount += node.filesCount
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return {
            totalSize: totalSize,
            filesCount: filesCount,
            treeDepth: treeDepth
        }
    }
}

// Calculate total size of all files in file system.
extension FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }
}

// Calculate files count in file system.
extension FileSystemInfo {
    var filesCount: Int { get } {
        return self.filesCount
    }
}

// Calculate file system tree depth.
extension FileSystemInfo {
    var treeDepth: Int { get } {
        return self.treeDepth
    }
}

// Calculate file system info.
extension FileSystemInfo {
    var info: FileSystemInfo { get } {
        return self
    }
}

// Calculate total size of all files in file system.
extension FileSystemNode {
    var totalSize: Int { get } {
        var totalSize = 0
        for node in self {
            totalSize += node.totalSize
        }
        return totalSize
    }
}

// Calculate files count in file system.
extension FileSystemNode {
    var filesCount: Int { get } {
        var filesCount = 0
        for node in self {
            filesCount += node.filesCount
        }
        return filesCount
    }
}

// Calculate file system tree depth.
extension FileSystemNode {
    var treeDepth: Int { get } {
        var treeDepth = 0
        for node in self {
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return treeDepth
    }
}

// Calculate file system info.
extension FileSystemNode {
    var info: FileSystemInfo { get } {
        var totalSize = 0
        var filesCount = 0
        var treeDepth = 0
        for node in self {
            totalSize += node.totalSize
            filesCount += node.filesCount
            treeDepth = max(treeDepth, node.treeDepth)
        }
        return {
            totalSize: totalSize,
            filesCount: filesCount,
            treeDepth: treeDepth
        }
    }
}

// Calculate total size of all files in file system.
extension FileSystemInfo {
    var totalSize: Int {

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

class FileSystemManager {
    var totalSize: Int = 0
    var filesCount: Int = 0
    var treeDepth: Int = 0
    
    // Calculate total size of all files in file system.
    // @return total size of all files in file system.
    func totalSize(in: [FileSystemNode]) -> Int {
        totalSize = 0
        for node in in {
            switch node {
                case let file(size: Int) {
                    totalSize += size
                }
                case let directory(contents: [FileSystemNode]) {
                    totalSize += totalSize(contents)
                }
            }
        }
        return totalSize
    }
    
    // Calculate files count in file system.
    // @return files count in file system.
    func filesCount(in: [FileSystemNode]) -> Int {
        filesCount = 0
        for node in in {
            switch node {
                case let file() {
                    filesCount += 1
                }
                case let directory(contents: [FileSystemNode]) {
                    filesCount += filesCount(contents)
                }
            }
        }
        return filesCount
    }
    
    // Calculate file system tree depth.
    // @return file system tree depth.
    func treeDepth(in: [FileSystemNode]) -> Int {
        treeDepth = 0
        for node in in {
            switch node {
                case let file() {
                    treeDepth = 0
                }
                case let directory(contents: [FileSystemNode]) {
                    treeDepth = max(treeDepth, treeDepth(contents)) + 1
                }
            }
        }
        return treeDepth
    }
}

func totalSize(fileSystem: [FileSystemNode]) -> Int {
    return fileSystemManager.totalSize(fileSystem)
}

func filesCount(fileSystem: [FileSystemNode]) -> Int {
    return fileSystemManager.filesCount(fileSystem)
}

func treeDepth(fileSystem: [FileSystemNode]) -> Int {
    return fileSystemManager.treeDepth(fileSystem)
}

func file(name: String, size: Int) -> FileSystemNode {
    return fileSystemNode(file(name, size))
}

func directory(name: String, contents: [FileSystemNode]) -> FileSystemNode {
    return fileSystemNode(directory(name, contents))
}

func fileSystemNode(node FileSystemNode) -> FileSystemNode {
    return node
}

func printFileSystemTree(fileSystem: [FileSystemNode]) {
    print("\nFile System Tree:\n")
    print("Total size: ", totalSize(fileSystem), "\n")
    print("Files count: ", filesCount(fileSystem), "\n")
    print("Tree depth: ", treeDepth(fileSystem), "\n")
    print("File system tree:\n")
    printFileSystemTreeHelper(fileSystem, 0)
    print("\n")
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    var totalSize: Int = 0
    var filesCount: Int = 0
    var treeDepth: Int = 0
    
    // Calculate total size of all files in file system.
    // @return total size of all files in file system.
    func totalSize(in: [FileSystemNode]) -> Int {
        totalSize = 0
        for node in in {
            switch node {
                case let file(size: Int) {
                    totalSize += size
                }
                case let directory(contents: [FileSystemNode]) {
                    totalSize += totalSize(contents)
                }
            }
        }
        return totalSize
    }
    
    // Calculate files count in file system.
    // @return files count in file system.
    func filesCount(in: [FileSystemNode]) -> Int {
        filesCount = 0
        for node in in {
            switch node {
                case let file() {
                    filesCount += 1
                }
                case let directory(contents: [FileSystemNode]) {
                    filesCount += filesCount(contents)
                }
            }
        }
        return filesCount
    }
    
    // Calculate file system tree depth.
    // @return file system tree depth.
    func treeDepth(in: [FileSystemNode]) -> Int {
        treeDepth = 0
        for node in in {
            switch node {
                case let file() {
                    treeDepth = 0
                }
                case let directory(contents: [FileSystemNode]) {
                    treeDepth = max(treeDepth, treeDepth(contents)) + 1
                }
            }
        }
        return treeDepth
    }
}

// File system manager instance.
let fileSystemManager = FileSystemManager()

// Calculate total size of all files in file system.
// @param fileSystem file system to calculate total size of all files in file system.
// @return total size of all files in file system.
func totalSize(fileSystem: [FileSystemNode]) -> Int {
    return fileSystemManager.totalSize(fileSystem)
}

// Calculate files count in file system.
// @param fileSystem file system to calculate files count in file system.
// @return files count in file system.
func filesCount(fileSystem: [FileSystemNode]) -> Int {
    return fileSystemManager.filesCount(fileSystem)
}

// Calculate file system tree depth.
// @param fileSystem file system to calculate file system tree depth.
// @return file system tree depth.
func treeDepth(fileSystem: [FileSystemNode]) -> Int {
    return fileSystemManager.treeDepth(fileSystem)
}

// Create file system node.
// @param name name of file system node.
// @param size size of file system node.
// @return file system node.
func file(name: String, size: Int) -> FileSystemNode {
    return fileSystemNode(file(name, size))
}

// Create file system node.
// @param name name of file system node.
// @param contents contents of file system node.
// @return file system node.
func directory(name: String, contents: [FileSystemNode]) -> FileSystemNode {
    return fileSystemNode(directory(name, contents))
}

// Create file system node.
// @param node file system node to create.
// @return file system node.
func fileSystemNode(node FileSystemNode) -> FileSystemNode {
    return node
}

// Print file system tree.
// @param fileSystem file system to print.
func printFileSystemTree(fileSystem: [FileSystemNode]) {
    print("\nFile System Tree:\n")
    print("Total size: ", totalSize(fileSystem), "\n")
    print("Files count: ", filesCount(fileSystem), "\n")
    print("Tree depth: ", treeDepth(fileSystem), "\n")
    print("File system tree:\n")
    printFileSystemTreeHelper(fileSystem, 0)
    print("\n")
}

// Print file system tree helper.
// @param fileSystem file system to print.
// @param level level of file system tree.
func printFileSystemTreeHelper(fileSystem: [FileSystemNode

indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var size = 0
        switch self {
            case file(size: var s) {
                size = s
            }
            case directory(contents: var c) {
                for let node in c {
                    size += node.totalSize
                }
            }
        }
        return size
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count = 1
            }
            case directory(contents: var c) {
                for let node in c {
                    count += node.filesCount
                }
            }
        }
        return count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth = 0
            }
            case directory(contents: var c) {
                for let node in c {
                    let d = node.treeDepth
                    if d > depth {
                        depth = d
                    }
                }
                depth += 1
            }
        }
        return depth
    }
}

class FileSystemManager {
    var root: FileSystemNode
    var totalSize: Int { get } {
        return root.totalSize
    }

    var filesCount: Int { get } {
        return root.filesCount
    }

    var treeDepth: Int { get } {
        return root.treeDepth
    }

    init(root: FileSystemNode) {
        self.root = root
    }
}

extension FileSystemManager {
    func totalSize() -> Int {
        return root.totalSize
    }
}

extension FileSystemManager {
    func filesCount() -> Int {
        return root.filesCount
    }
}

extension FileSystemManager {
    func treeDepth() -> Int {
        return root.treeDepth
    }
}

extension FileSystemNode {
    func totalSize() -> Int {
        return totalSize()
    }
}

extension FileSystemNode {
    func filesCount() -> Int {
        return filesCount()
    }
}

extension FileSystemNode {
    func treeDepth() -> Int {
        return treeDepth()
    }
}

extension FileSystemNode {
    func totalSize() -> Int {
        var size = 0
        switch self {
            case file(size: var s) {
                size = s
            }
            case directory(contents: var c) {
                for let node in c {
                    size += node.totalSize
                }
            }
        }
        return size
    }
}

extension FileSystemNode {
    func filesCount() -> Int {
        var count = 0
        switch self {
            case file() {
                count = 1
            }
            case directory(contents: var c) {
                for let node in c {
                    count += node.filesCount
                }
            }
        }
        return count
    }
}

extension FileSystemNode {
    func treeDepth() -> Int {
        var depth = 0
        switch self {
            case file() {
                depth = 0
            }
            case directory(contents: var c) {
                for let node in c {
                    let d = node.treeDepth
                    if d > depth {
                        depth = d
                    }
                }
                depth += 1
            }
        }
        return depth
    }
}

```swift
indirect enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

protocol FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }
}

// Abstract file system manager and metadata calculation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var size = 0
        switch self {
            case file(size: var s) {
                size = s
            }
            case directory(contents: var c) {
                for let node in c {
                    size += node.totalSize
                }
            }
        }
        return size
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count = 1
            }
            case directory(contents: var c) {
                for let node in c {
                    count += node.filesCount
                }
            }
        }
        return count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth = 0
            }
            case directory(contents: var c) {
                for let node in c {
                    let d = node.treeDepth
                    if d > depth {
                        depth = d
                    }
                }
                depth += 1
            }
        }
        return depth
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    var root: FileSystemNode
    var totalSize: Int { get } {
        return root.totalSize
    }

    var filesCount: Int { get } {
        return root.filesCount
    }

    var treeDepth: Int { get } {
        return root.treeDepth
    }

    init(root: FileSystemNode) {
        self.root = root
    }
}

// Calculate total size of all files in file system.
extension FileSystemManager {
    func totalSize() -> Int {
        return root.totalSize
    }
}

// Calculate files count in file system.
extension FileSystemManager {
    func filesCount() -> Int {
        return root.filesCount
    }
}

// Calculate file system tree depth.
extension FileSystemManager {
    func treeDepth() -> Int {
        return root.treeDepth
    }
}

// Calculate total size of all files in file system.
extension FileSystemNode {
    func totalSize() -> Int {
        return totalSize()
    }
}

// Calculate files count in file system.
extension FileSystemNode {
    func filesCount() -> Int {
        return filesCount()
    }
}

// Calculate file system tree depth.
extension FileSystemNode {
    func treeDepth() -> Int {
        return treeDepth()
    }
}

// Calculate total size of all files in file system.
extension FileSystemNode {
    func totalSize() -> Int {
        var size = 0
        switch self {
            case file(size: var s) {
                size = s
            }
            case directory(contents: var c) {
                for let node in c {
                    size += node.totalSize
                }
            }
        }
        return size
    }
}

// Calculate files count in file system.
extension FileSystemNode {
    func filesCount() -> Int {
        var count = 0
        switch self {
            case file() {
                count = 1
            }
            case directory(contents: var c) {
                for let node in c {
                    count += node.filesCount
                }
            }
        }
        return count
    }
}

// Calculate file system tree depth.
extension FileSystemNode {
    func treeDepth() -> Int {
        var depth = 0
        switch self {
            case file() {
                depth = 0
            }
            case directory(contents: var c) {
                for let node in c {
                    let d = node.treeDepth
                    if d > depth {
                        depth = d
                    }
                }
                depth += 1
            }
        }
        return depth
    }
}

// Calculate total size of all files in file system.
extension FileSystemNode {
    func totalSize() -> Int {
        return totalSize()
    }
}

// Calculate files count in file system.
extension FileSystemNode {
    func filesCount() -> Int {
        return filesCount()
    }
}

// Calculate file system tree depth.
extension FileSystemNode {
    func treeDepth() -> Int {
        return treeDepth()
    }
}

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

// Stack of integers.
var stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print(stack.pop()) // 3
print(stack.pop()) // 2
print(stack.pop()) // 1
print(stack.pop()) // nil
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    var count: Int = 0
    
    // Initializer.
    init() {
        self.elements = []
        self.count = 0
    }
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        self.elements.append(element)
        self.count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if self.count == 0 {
            return nil
        }
        
        let element = self.elements[self.count - 1]
        self.elements.removeLast()
        self.count -= 1
        return element
    }
}

class StackOfInts: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push an integer onto the stack.
    func push(_ element: Int) {
        super.push(element)
    }
    
    // Pop an integer from the stack.
    func pop() -> Int? {
        return super.pop() as? Int
    }
}

class StackOfStrings: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a string onto the stack.
    func push(_ element: String) {
        super.push(element)
    }
    
    // Pop a string from the stack.
    func pop() -> String? {
        return super.pop() as? String
    }
}

class StackOfCustomElements<Element>: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a custom element onto the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop a custom element from the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    var count: Int = 0
    
    // Initializer.
    init() {
        self.elements = []
        self.count = 0
    }
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        self.elements.append(element)
        self.count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if self.count == 0 {
            return nil
        }
        
        let element = self.elements[self.count - 1]
        self.elements.removeLast()
        self.count -= 1
        return element
    }
}

// Stack with integer elements.
class StackOfInts: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push an integer onto the stack.
    func push(_ element: Int) {
        super.push(element)
    }
    
    // Pop an integer from the stack.
    func pop() -> Int? {
        return super.pop() as? Int
    }
}

// Stack with string elements.
class StackOfStrings: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a string onto the stack.
    func push(_ element: String) {
        super.push(element)
    }
    
    // Pop a string from the stack.
    func pop() -> String? {
        return super.pop() as? String
    }
}

// Stack with custom elements.
class StackOfCustomElements<Element>: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a custom element onto the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop a custom element from the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustomElements<Element>: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a custom element onto the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop a custom element from the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustomElements<Element>: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a custom element onto the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop a custom element from the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustomElements<Element>: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a custom element onto the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop a custom element from the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustomElements<Element>: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a custom element onto the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop a custom element from the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustomElements<Element>: StackProtocol {
    // Initializer.
    init() {
        super.init()
    }
    
    // Push a custom element onto the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop a custom element from the

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements = [Element]()
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.pop()
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements = [Element]()
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.pop()
    }
}

// Stack of integers.
var stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)

// Pop elements from the stack.
var poppedElement: Int?
while let element = stack.pop() {
    poppedElement = element
}

print("Popped element: \(poppedElement)")
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

// Stack of integers.
var stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print(stack.pop()) // 3
print(stack.pop()) // 2
print(stack.pop()) // 1
print(stack.pop()) // nil

// Stack of strings.
var stack = Stack<String>()
stack.push("Hello")
stack.push("World")
print(stack.pop()) // World
print(stack.pop()) // Hello
print(stack.pop()) // nil
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if count == 0 {
            return nil
        }
        count -= 1
        return elements.pop()
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if count == 0 {
            return nil
        }
        count -= 1
        return elements.pop()
    }
}

// Stack of integers.
let stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)

// Pop elements from the stack.
while let element = stack.pop() {
    print(element)
}
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    var count: Int = 0
    
    // Initialize the stack with an optional initial element.
    init(_ initialElement: Element? = nil) {
        if initialElement != nil {
            push(initialElement)
        }
    }
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if count == 0 {
            return nil
        }
        let element = elements[count - 1]
        elements.removeLast()
        count -= 1
        return element
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    var count: Int = 0
    
    // Initialize the stack with an optional initial element.
    init(_ initialElement: Element? = nil) {
        if initialElement != nil {
            push(initialElement)
        }
    }
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if count == 0 {
            return nil
        }
        let element = elements[count - 1]
        elements.removeLast()
        count -= 1
        return element
    }
}

// Example usage:
let stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)

print(stack.pop()) // Output: 3
print(stack.pop()) // Output: 2
print(stack.pop()) // Output: 1
print(stack.pop()) // Output: nil (empty stack)

```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

class CustomElement {
    var name: String
    var age: Int
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

// Stack with int elements.
let stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print(stack.pop()) // 3
print(stack.pop()) // 2
print(stack.pop()) // 1
print(stack.pop()) // nil

// Stack with string elements.
let stack = Stack<String>()
stack.push("Hello")
stack.push("World")
print(stack.pop()) // World
print(stack.pop()) // Hello
print(stack.pop()) // nil

// Stack with custom elements.
class CustomElement {
    var name: String
    var age: Int
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }
}
let stack = Stack<CustomElement>()
stack.push(CustomElement(name: "John", age: 30))
stack.push(CustomElement(name: "Jane", age: 25))
print(stack.pop()?.name) // Jane
print(stack.pop()?.age) // 25
print(stack.pop()?.name) // John
print(stack.pop()?.age) // 30
print(stack.pop()) // nil
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        count -= 1
        return elements.pop()
    }
}

// Stack of integers.
var stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print(stack.pop()) // 3
print(stack.pop()) // 2
print(stack.pop()) // 1
print(stack.pop()) // nil
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.last!
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.last!
    }
}

// Stack of integers.
var stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print(stack.pop()) // 3
print(stack.pop()) // 2
print(stack.pop()) // 1
print(stack.pop()) // nil
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if count == 0 {
            return nil
        }
        count -= 1
        return elements.pop()
    }
}

```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    var elements = [Element]()
    var count = 0
    
    // Push an element onto the stack.
    func push(_ element: Element) {
        elements.append(element)
        count += 1
    }
    
    // Pop an element from the stack.
    func pop() -> Element? {
        if count == 0 {
            return nil
        }
        count -= 1
        return elements.pop()
    }
}

// Stack of integers.
var stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
stack.push(4)
print("Stack:", stack.elements)
print("Popped:", stack.pop())
print("Popped:", stack.pop())
print("Popped:", stack.pop())
print("Popped:", stack.pop())
print("Popped:", stack.pop())
print("Popped:", stack.pop())
print("Popped:", stack.pop())
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var counter: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    override func subscript(key: Key) -> Element? {
        if let element = cache[key] {
            queue.remove(key)
            queue.add(key)
            return element
        }
        return nil
    }
    
    override func set(key: Key, element: Element) {
        if let element = cache[key] {
            queue.remove(key)
        } else {
            counter += 1
            if counter > capacity {
                var leastRecentlyUsedKey = queue.dequeue()
                cache.remove(leastRecentlyUsedKey)
            }
        }
        queue.add(key)
        cache[key] = element
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var counter: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    override func subscript(key: Key) -> Element? {
        if let element = cache[key] {
            queue.remove(key)
            queue.add(key)
            return element
        }
        return nil
    }
    
    override func set(key: Key, element: Element) {
        if let element = cache[key] {
            queue.remove(key)
        } else {
            counter += 1
            if counter > capacity {
                var leastRecentlyUsedKey = queue.dequeue()
                cache.remove(leastRecentlyUsedKey)
            }
        }
        queue.add(key)
        cache[key] = element
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 10)
cache["key1"] = 1
cache["key2"] = 2
cache["key3"] = 3
cache["key4"] = 4

print(cache["key1"]) // prints 1
print(cache["key2"]) // prints 2
print(cache["key3"]) // prints 3
print(cache["key4"]) // prints 4
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var count: Int
    
    // Initialize a new cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.count = 0
    }
    
    // Get the value associated with the specified key.
    // If the key is not found in the cache, return nil.
    func subscript(key: Key) -> Element? {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
            return value
        } else {
            return nil
        }
    }
    
    // Set the value associated with the specified key.
    // If the key already exists in the cache, update its value.
    // If the cache is at capacity, remove the least recently used item to make space for the new item.
    func set(key: Key, value: Element) {
        if let existingValue = cache[key] {
            queue.remove(key)
        }
        cache[key] = value
        queue.add(key)
        count += 1
        if count > capacity {
            let leastRecentlyUsedKey = queue.first
            queue.remove(leastRecentlyUsedKey)
            cache.remove(leastRecentlyUsedKey)
            count -= 1
        }
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var count: Int
    
    // Initialize a new cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.count = 0
    }
    
    // Get the value associated with the specified key.
    // If the key is not found in the cache, return nil.
    func subscript(key: Key) -> Element? {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
            return value
        } else {
            return nil
        }
    }
    
    // Set the value associated with the specified key.
    // If the key already exists in the cache, update its value.
    // If the cache is at capacity, remove the least recently used item to make space for the new item.
    func set(key: Key, value: Element) {
        if let existingValue = cache[key] {
            queue.remove(key)
        }
        cache[key] = value
        queue.add(key)
        count += 1
        if count > capacity {
            let leastRecentlyUsedKey = queue.first
            queue.remove(leastRecentlyUsedKey)
            cache.remove(leastRecentlyUsedKey)
            count -= 1
        }
    }
}
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var counter: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    // Add a new item to the cache.
    // If the cache is full, remove the least recently used item to make space.
    func add(key: Key, element: Element) {
        if let cachedElement = self.cache[key] {
            self.queue.remove(cachedElement)
        }
        
        if self.counter == capacity {
            let leastRecentlyUsedKey = self.queue.dequeue()
            self.cache.remove(leastRecentlyUsedKey)
            self.counter -= 1
        }
        
        self.cache[key] = element
        self.queue.enqueue(key)
        self.counter += 1
    }
    
    // Get an item from the cache.
    // If the item is not found, return nil.
    func get(key: Key) -> Element? {
        let cachedElement = self.cache[key]
        if cachedElement != nil {
            self.queue.remove(cachedElement)
            self.queue.enqueue(key)
            return cachedElement
        }
        return nil
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var counter: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    // Add a new item to the cache.
    // If the cache is full, remove the least recently used item to make space.
    func add(key: Key, element: Element) {
        if let cachedElement = self.cache[key] {
            self.queue.remove(cachedElement)
        }
        
        if self.counter == capacity {
            let leastRecentlyUsedKey = self.queue.dequeue()
            self.cache.remove(leastRecentlyUsedKey)
            self.counter -= 1
        }
        
        self.cache[key] = element
        self.queue.enqueue(key)
        self.counter += 1
    }
    
    // Get an item from the cache.
    // If the item is not found, return nil.
    func get(key: Key) -> Element? {
        let cachedElement = self.cache[key]
        if cachedElement != nil {
            self.queue.remove(cachedElement)
            self.queue.enqueue(key)
            return cachedElement
        }
        return nil
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 5)

cache.add("key1", 1)
cache.add("key2", 2)
cache.add("key3", 3)
cache.add("key4", 4)
cache.add("key5", 5)

print(cache.get("key1")) // prints 1
print(cache.get("key2")) // prints 2
print(cache.get("key3")) // prints 3
print(cache.get("key4")) // prints 4
print(cache.get("key5")) // prints 5

// Output:
// 1
// 2
// 3
// 4
// 5
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    // The capacity limit of the cache.
    var capacity: Int
    // The underlying map that stores the cache items.
    var map: Map<Key, Element>
    // A queue that keeps track of the order of insertion of items into the cache.
    var queue: Queue<Key>
    // A map that keeps track of the insertion order of items in the cache.
    var insertionOrder: Map<Key, Int>
    // The number of items currently in the cache.
    var size: Int
    // The maximum number of items that can be stored in the cache.
    var maxItems: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    // The number of items that have been evicted from the cache.
    var evicts: Int
    // The number of items that have been removed from the cache due to capacity limit.
    var evictions: Int
    // The number of items that have been accessed in the cache.
    var hits: Int
    

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var count: Int
    
    // Initializes a new cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.count = 0
    }
    
    // Returns the number of items in the cache.
    func count -> Int { return count }
    
    // Returns the capacity of the cache.
    func capacity -> Int { return capacity }
    
    // Returns the current size of the cache, which is the number of items in the cache.
    func size -> Int { return count }
    
    // Returns true if the cache is empty, false otherwise.
    func isEmpty -> Bool { return count == 0 }
    
    // Returns true if the cache is full, false otherwise.
    func isFull -> Bool { return count == capacity }
    
    // Returns true if the cache contains the specified key, false otherwise.
    func contains(key: Key) -> Bool { return cache.contains(key: key) }
    
    // Returns the element associated with the specified key, or nil if the key is not in the cache.
    func objectForKey(key: Key) -> Element? { return cache[key] }
    
    // Adds the specified key-value pair to the cache.
    // If the cache is full, the least recently used item is removed to make space for the new item.
    func setObject(value: Element, forKey: Key) {
        if cache.contains(key: forKey) {
            queue.remove(forKey: forKey)
            queue.addObject(forKey: forKey)
            cache[forKey] = value
        } else {
            if isFull {
                let keyToRemove = queue.dequeueFirst()
                cache.remove(forKey: keyToRemove)
            }
            queue.addObject(forKey: forKey)
            cache[forKey] = value
        }
        count += 1
    }
    
    // Removes the specified key from the cache.
    func removeObject(forKey: Key) {
        queue.remove(forKey: forKey)
        cache.remove(forKey: forKey)
        count -= 1
    }
    
    // Removes all items from the cache.
    func removeAllObjects() {
        queue.removeAllObjects()
        cache.removeAllObjects()
        count = 0
    }
    
    // Returns an array of all keys in the cache.
    func allKeys -> [Key] { return queue.allObjects }
    
    // Returns an array of all values in the cache.
    func allValues -> [Element] { return queue.allObjects.map { cache[it]! } }
    
    // Returns an array of all key-value pairs in the cache.
    func allPairs -> [(Key, Element)] { return queue.allObjects.map { (key: key, value: cache[key]!) } }
    
    // Returns an array of all keys in the cache that match the specified predicate.
    func keys(predicate: (Key) -> Bool) -> [Key] { return queue.allObjects.filter(predicate).map { key: key } }
    
    // Returns an array of all values in the cache that match the specified predicate.
    func values(predicate: (Element) -> Bool) -> [Element] { return queue.allObjects.filter(predicate).map { cache[it]! } }
    
    // Returns an array of all key-value pairs in the cache that match the specified predicate.
    func pairs(predicate: (Key, Element) -> Bool) -> [(Key, Element)] { return queue.allObjects.filter(predicate).map { (key: key, value: cache[key]!) } }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var count: Int
    
    // Initializes a new cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.count = 0
    }
    
    // Returns the number of items in the cache.
    func count -> Int { return count }
    
    // Returns the capacity of the cache.
    func capacity -> Int { return capacity }
    
    // Returns the current size of the cache, which is the number of items in the cache.
    func size -> Int { return count }
    
    // Returns true if the cache is empty, false otherwise.
    func isEmpty -> Bool { return count == 0 }
    
    // Returns true if the cache is full, false otherwise.
    func isFull -> Bool { return count == capacity }
    
    // Returns true if the cache contains the specified key, false otherwise.
    func contains(key: Key) -> Bool { return cache.contains(key: key) }
    
    // Returns the element associated with the specified key, or nil if the key is not in the cache.
    func objectForKey(key: Key) -> Element? { return cache[key] }
    
    // Adds the specified key-value pair to the cache.
    // If the cache is full, the least recently used item is removed to make space for the new item.
    func setObject(value: Element, forKey: Key) {
        if cache.contains(key: forKey) {
            queue.remove(forKey: forKey)
            queue.addObject(forKey: forKey)
            cache[forKey] = value
        } else {
            if isFull {
                let keyToRemove = queue.dequeueFirst()
                cache.remove(forKey: keyToRemove)
            }
            queue.addObject(forKey: forKey)
            cache[forKey] = value
        }
        count += 1
    }
    
    // Removes the specified key from the cache.
    func removeObject(forKey: Key) {
        queue.remove(forKey: forKey)
        cache.remove(forKey: forKey)
        count -= 1
    }
    
    // Removes all items from the cache.
    func removeAllObjects() {
        queue.removeAllObjects()
        cache.removeAllObjects()
        count = 0
    }
    
    // Returns an array of all keys in the cache.
    func allKeys -> [Key] { return queue.allObjects }
    
    // Returns an array of all values in the cache.
    func allValues -> [Element] { return queue.allObjects.map { cache[it]! } }
    
    // Returns an array of all key-value pairs in the cache.
    func allPairs -> [(Key, Element)] { return queue.allObjects.map { (key: key, value: cache[key]!) } }
    
    // Returns an array of all keys in the cache that match the specified predicate.
    func keys(predicate: (Key) -> Bool) -> [Key] { return queue.allObjects.filter(predicate).map { key: key } }
    
    // Returns an array of all values in the cache that match the specified predicate.
    func values(predicate: (Element) -> Bool) -> [Element] { return queue.allObjects.filter(predicate).map { cache[it]! } }
    
    // Returns an array of all key-value pairs in the cache that match the specified predicate.
    func pairs(predicate: (Key, Element) -> Bool) -> [(Key, Element)] { return queue.allObjects.filter(predicate).map { (key: key, value: cache[key]!) } }
}
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var evict: (Key) -> Element?
    var _evict: (Key) -> Element? {
        evict = { key in
            let evicted = self.evict(key)
            if let evicted = evicted {
                self.queue.remove(key)
            }
            evicted
        }
        return self._evict
    }
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.evict = { key in
            self.cache.remove(key)
        }
    }
    
    // Adds an entry to the cache.
    // If the entry already exists, it will be moved to the front of the queue.
    // If the cache is full, the least recently used entry will be evicted.
    func add(key: Key, value: Element) {
        if let existing = self.cache[key] {
            self.queue.remove(existing)
        } else if self.queue.count == self.capacity {
            let evicted = self.evict(self.queue.dequeue())
            if let evicted = evicted {
                self.cache.remove(evicted)
            }
        }
        self.cache[key] = value
        self.queue.add(key)
    }
    
    // Returns the value associated with the given key.
    // If the key does not exist, returns nil.
    // If the key exists, it will be moved to the front of the queue.
    func get(key: Key) -> Element? {
        let value = self.cache[key]
        if let value = value {
            self.queue.remove(key)
            self.queue.add(key)
            return value
        }
        return nil
    }
    
    // Removes the entry associated with the given key.
    // If the key does not exist, does nothing.
    // If the key exists, it will be removed from the cache.
    func remove(key: Key) {
        let value = self.cache[key]
        if let value = value {
            self.queue.remove(key)
            self.cache.remove(key)
        }
    }
    
    // Clears the cache.
    func clear() {
        self.cache.clear()
        self.queue.clear()
    }
    
    // Returns the number of entries in the cache.
    func count() -> Int {
        return self.queue.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return self.capacity
    }
    
    // Returns the number of entries in the cache.
    func count() -> Int {
        return self.queue.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return self.capacity
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var evict: (Key) -> Element?
    var _evict: (Key) -> Element? {
        evict = { key in
            let evicted = self.evict(key)
            if let evicted = evicted {
                self.queue.remove(key)
            }
            evicted
        }
        return self._evict
    }
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.evict = { key in
            self.cache.remove(key)
        }
    }
    
    // Adds an entry to the cache.
    // If the entry already exists, it will be moved to the front of the queue.
    // If the cache is full, the least recently used entry will be evicted.
    func add(key: Key, value: Element) {
        if let existing = self.cache[key] {
            self.queue.remove(existing)
        } else if self.queue.count == self.capacity {
            let evicted = self.evict(self.queue.dequeue())
            if let evicted = evicted {
                self.cache.remove(evicted)
            }
        }
        self.cache[key] = value
        self.queue.add(key)
    }
    
    // Returns the value associated with the given key.
    // If the key does not exist, returns nil.
    // If the key exists, it will be moved to the front of the queue.
    func get(key: Key) -> Element? {
        let value = self.cache[key]
        if let value = value {
            self.queue.remove(key)
            self.queue.add(key)
            return value
        }
        return nil
    }
    
    // Removes the entry associated with the given key.
    // If the key does not exist, does nothing.
    // If the key exists, it will be removed from the cache.
    func remove(key: Key) {
        let value = self.cache[key]
        if let value = value {
            self.queue.remove(key)
            self.cache.remove(key)
        }
    }
    
    // Clears the cache.
    func clear() {
        self.cache.clear()
        self.queue.clear()
    }
    
    // Returns the number of entries in the cache.
    func count() -> Int {
        return self.queue.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return self.capacity
    }
    
    // Returns the number of entries in the cache.
    func count() -> Int {
        return self.queue.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return self.capacity
    }
}

// In-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class LRUCache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var evict: (Key) -> Element? {
        evict = { key in
            let evicted = self.evict(key)
            if let evicted = evicted {
                self.queue.remove(key)
            }
            evicted
        }
        return self._evict
    }
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.evict = { key in
            self.cache.remove(key)
        }
    }
    
    // Adds an entry to the cache.
    // If the entry already exists, it will be moved to the front of the queue.
    // If the cache is full, the least recently used entry will be evicted.
    func add(key: Key, value: Element) {
        if let existing = self.cache[key] {
            self.queue.

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var cacheSize: Int
    var evictionCount: Int
    
    // Initializes a new cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.cacheSize = 0
        self.evictionCount = 0
    }
    
    // Returns the number of items in the cache.
    func count() -> Int {
        return self.cacheSize
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return self.capacity
    }
    
    // Returns the number of items that have been evicted from the cache.
    func evictionCount() -> Int {
        return self.evictionCount
    }
    
    // Returns the total size of all items in the cache.
    func totalSize() -> Int {
        var size = 0
        for _, element in self.cache {
            size += element.size
        }
        return size
    }
    
    // Returns the total size of all items in the cache, including the size of the queue.
    func totalSizeWithQueue() -> Int {
        return self.totalSize() + self.queue.count
    }
    
    // Returns the size of the queue.
    func queueSize() -> Int {
        return self.queue.count
    }
    
    // Returns the size of the cache.
    func cacheSize() -> Int {
        return self.cacheSize
    }
    
    // Returns the size of the queue and the size of the cache.
    func queueAndCacheSize() -> (Int, Int) {
        return (self.queueSize(), self.cacheSize())
    }
    
    // Returns the size of the queue and the size of the cache, including the size of the queue.
    func queueAndCacheSizeWithQueue() -> (Int, Int) {
        return (self.queueAndCacheSize().0 + self.queueSize(), self.queueAndCacheSize().1)
    }
    
    // Returns the size of the queue and the size of the cache, including the size of the queue and the size of the cache.
    func queueAndCacheSizeWithQueueAndCache() -> (Int, Int) {
        return (self.queueAndCacheSizeWithQueue().0 + self.queueSize(), self.queueAndCacheSizeWithQueue().1)
    }
    
    // Returns the size of the queue and the size of the cache, including the size of the queue and the size of the cache, and the size of the queue.
    func queueAndCacheSizeWithQueueAndCacheAndQueue() -> (Int, Int) {
        return (self.queueAndCacheSizeWithQueueAndCache().0 + self.queueSize(), self.queueAndCacheSizeWithQueueAndCache().1)
    }
    
    // Returns the size of the queue and the size of the cache, including the size of the queue and the size of the cache, and the size of the queue, and the size of the cache.
    func queueAndCacheSizeWithQueueAndCacheAndQueueAndCache() -> (Int, Int) {
        return (self.queueAndCacheSizeWithQueueAndCacheAndQueue().0 + self.queueSize(), self.queueAndCacheSizeWithQueueAndCacheAndQueue().1)
    }
    
    // Returns the size of the queue and the size of the cache, including the size of the queue and the size of the cache, and the size of the queue, and the size of the cache, and the size of the queue.
    func queueAndCacheSizeWithQueueAndCacheAndQueueAndCacheAndQueue() -> (Int, Int) {
        return (self.queueAndCacheSizeWithQueueAndCacheAndQueueAndCache().0 + self.queueSize(), self.queueAndCacheSizeWithQueueAndCacheAndQueueAndCache().1)
    }
    
    // Returns the size of the queue and the size of the cache, including the size of the queue and the size of the cache, and the size of the queue, and the size of the cache, and the size of the queue, and the size of the cache.
    func queueAndCacheSizeWithQueueAndCacheAndQueueAndCacheAndQueueAndCache() -> (Int, Int) {
        return (self.queueAndCacheSizeWithQueueAnd

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var cacheSize: Int
    var evictions: Int
    
    // Initializing constructor for the Cache class.
    // The constructor takes in a capacity parameter, which specifies the maximum number of items that can be stored in the cache.
    // It initializes the cache dictionary and queue, and sets the capacity and cacheSize properties accordingly.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.cacheSize = 0
        self.evictions = 0
    }
    
    // Subscript operator for getting an item from the cache.
    // The operator takes in a key parameter, which specifies the item to retrieve from the cache.
    // It checks if the key is present in the cache, and if so, it returns the corresponding element.
    // If the key is not present, it returns nil.
    func subscript(key: Key) -> Element? {
        if let value = self.cache[key] {
            self.queue.remove(value: key)
            self.queue.insert(value: key)
            return value
        }
        return nil
    }
    
    // Set operator for adding an item to the cache.
    // The operator takes in a key and an element parameter, which specify the item to add to the cache.
    // It first checks if the key is already present in the cache, and if so, it updates the corresponding element in the cache.
    // If the key is not present, it adds the key and element to the cache, and updates the queue accordingly.
    // If the cache is full, it removes the least recently used item from the cache and evicts it from the queue.
    func set(key: Key, element: Element) {
        if let value = self.cache[key] {
            self.queue.remove(value: key)
            self.cache[key] = element
            self.queue.insert(value: key)
        } else {
            if self.cacheSize < self.capacity {
                self.cache[key] = element
                self.queue.insert(value: key)
                self.cacheSize += 1
            } else {
                self.evictions += 1
                let leastRecentlyUsedKey = self.queue.dequeue()
                self.cache.remove(leastRecentlyUsedKey)
                self.cache[key] = element
                self.queue.insert(value: key)
            }
        }
    }
    
    // Clear method for clearing the cache.
    // It removes all items from the cache and the queue.
    func clear() {
        self.cache.clear()
        self.queue.clear()
        self.cacheSize = 0
        self.evictions = 0
    }
    
    // Capacity method for getting the capacity of the cache.
    // It returns the capacity of the cache.
    func capacity() -> Int {
        return self.capacity
    }
    
    // Cache size method for getting the current size of the cache.
    // It returns the number of items in the cache.
    func cacheSize() -> Int {
        return self.cacheSize
    }
    
    // Evictions method for getting the number of evictions made by the cache.
    // It returns the number of evictions made by the cache.
    func evictions() -> Int {
        return self.evictions
    }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var cacheSize: Int
    var evictions: Int
    
    // Initializing constructor for the Cache class.
    // The constructor takes in a capacity parameter, which specifies the maximum number of items that can be stored in the cache.
    // It initializes the cache dictionary and queue, and sets the capacity and cacheSize properties accordingly.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.cacheSize = 0
        self.evictions = 0
    }
    
    // Subscript operator for getting an item from the cache.
    // The operator takes in a key parameter, which specifies the item to retrieve from the cache.
    // It checks if the key is present in the cache, and if so, it returns the corresponding element.
    // If the key is not present, it returns nil.
    func subscript(key: Key) -> Element? {
        if let value = self.cache[key] {
            self.queue.remove(value: key)
            self.queue.insert(value: key)
            return value
        }
        return nil
    }
    
    // Set operator for adding an item to the cache.
    // The operator takes in a key and an element parameter, which specify the item to add to the cache.
    // It first checks if the key is already present in the cache, and if so, it updates the corresponding element in the cache.
    // If the key is not present, it adds the key and element to the cache, and updates the queue accordingly.
    // If the cache is full, it removes the least recently used item from the cache and evicts it from the queue.
    func set(key: Key, element: Element) {
        if let value = self.cache[key] {
            self.queue.remove(value: key)
            self.cache[key] = element
            self.queue.insert(value: key)
        } else {
            if self.cacheSize < self.capacity {
                self.cache[key] = element
                self.queue.insert(value: key)
                self.cacheSize += 1
            } else {
                self.evictions += 1
                let leastRecentlyUsedKey = self.queue.dequeue()
                self.cache.remove(leastRecentlyUsedKey)
                self.cache[key] = element
                self.queue.insert(value: key)
            }
        }
    }
    
    // Clear method for clearing the cache.
    // It removes all items from the cache and the queue.
    func clear() {
        self.cache.clear()
        self.queue.clear()
        self.cacheSize = 0
        self.evictions = 0
    }
    
    // Capacity method for getting the capacity of the cache.
    // It returns the capacity of the cache.
    func capacity() -> Int {
        return self.capacity
    }
    
    // Cache size method for getting the current size of the cache.
    // It returns the number of items in the cache.
    func cacheSize() -> Int {
        return self.cacheSize
    }
    
    // Evictions method for getting the number of evictions made by the cache.
    // It returns the number of evictions made by the cache.
    func evictions() -> Int {
        return self.evictions
    }
}

// Example usage of the Cache class.
// This code creates a new Cache object with a capacity of 5, and then adds some items to it.
// It also retrieves an item from the cache, and removes all items from the cache.
let cache = Cache<String, Int>(capacity: 5)
cache.set(key: "apple", element: 1)
cache.set(key: "banana", element: 2)
cache.set(key: "orange", element: 3)
cache.set(key: "pear", element: 4)
cache.set(key: "grape", element: 5)

print(cache.cacheSize()) // prints 5
print(cache.evictions()) // prints 0

let value = cache.subscript(key: "apple")
print(value) // prints 1

cache.clear()

print(cache.cacheSize()) // prints

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var _evictionCount: Int
    var _evictionLimit: Int
    var _evictionThreshold: Double
    var _evictionPolicy: EvictionPolicy
    var _evictionPolicyKey: Key?
    var _evictionPolicyValue: Element?
    var _evictionPolicyKeyCount: Int
    var _evictionPolicyKeyCountLimit: Int
    var _evictionPolicyKeyCountThreshold: Double
    var _evictionPolicyKeyCountThresholdLimit: Double
    var _evictionPolicyKeyCountThresholdReached: Bool
    var _evictionPolicyKeyCountThresholdReachedLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCount: Int
    var _evictionPolicyKeyCountThresholdReachedCountLimit: Int
    var _evictionPolicyKeyCountThresholdReachedCountThreshold: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdLimit: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReached: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCount: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountLimit: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThreshold: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdLimit: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReached: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCount: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountLimit: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThreshold: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdLimit: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCount: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountLimit: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThreshold: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdLimit: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReached: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCount: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountLimit: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThreshold: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdLimit: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReached: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCount: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountLimit: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThreshold: Double
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThreshold: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdLimit: Bool
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCount: Int
    var _evictionPolicyKeyCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReachedCountThresholdReached

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

```swift
protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

// Generic in-memory cache that follows to the LRU (Least Recently Used) eviction policy.
// The cache should have a specified capacity limit, and when this limit is reached, it should remove the least recently used item to make space for new entries.
class Cache<Key: Hashable, Element>: CacheProtocol {
    var capacity: Int
    var cache: Dictionary<Key, Element>
    var queue: Queue<Key>
    var counter: Int
    
    // Initializes a new cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int {
        return cache.count
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int {
        return capacity

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>
    : ExpirableCacheProtocol {
    
    // The underlying cache map.
    var cache: Map<Key, Value>
    
    // The expiration time for each key.
    var expiration: Map<Key, TimeInterval>
    
    // The expiration time for each key.
    var evictionPolicy: EvictionPolicy
    
    // The maximum number of entries to keep in the cache.
    var maxEntries: Int
    
    // The maximum time to keep entries in the cache.
    var maxAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var minEntries: Int
    
    // The minimum time to keep entries in the cache.
    var minAge: TimeInterval
    
    // The minimum time to keep entries in the cache.
    var min

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    var _cache: Dictionary<Key, Value> = Dictionary()
    var _expiration: Dictionary<Key, TimeInterval> = Dictionary()
    var _expirationPolicy: ExpirationPolicy<Key, TimeInterval> = ExpirationPolicy()
    var _expirationTimer: Timer? = nil

    // Initializes the cache with the given expiration policy.
    init(expirationPolicy: ExpirationPolicy<Key, TimeInterval>) {
        self.init(expirationPolicy: expirationPolicy, expirationTimer: nil)
    }

    // Initializes the cache with the given expiration policy and timer.
    init(expirationPolicy: ExpirationPolicy<Key, TimeInterval>, expirationTimer: Timer?) {
        self._expirationPolicy = expirationPolicy
        self._expirationTimer = expirationTimer
    }

    // Returns the value associated with the given key, or nil if not found.
    func get(key: Key) -> Value? {
        if let value = self._cache[key] {
            if let expiration = self._expiration[key] {
                if expiration <= Date.now.timeIntervalSinceNow {
                    self._expirationPolicy.evict(key: key)
                    return nil
                } else {
                    return value
                }
            }
            return value
        }
        return nil
    }

    // Associates the given value with the given key, and sets the expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        self._cache[key] = value
        self._expiration[key] = expiration
        self._expirationPolicy.put(key: key, expiration: expiration)
        if self._expirationTimer == nil {
            self._expirationTimer = Timer(repeats: false, target: self, selector: "expirationTimerFired:")
        }
        self._expirationTimer.start()
    }

    // Removes the value associated with the given key.
    func remove(key: Key) {
        self._cache.remove(key)
        self._expiration.remove(key)
        self._expirationPolicy.evict(key: key)
    }

    // Clears the cache.
    func clear() {
        self._cache.clear()
        self._expiration.clear()
        self._expirationPolicy.clear()
    }

    // Returns the number of items in the cache.
    func count() -> Int {
        return self._cache.count
    }

    // Returns the expiration policy of the cache.
    func expirationPolicy() -> ExpirationPolicy<Key, TimeInterval> {
        return self._expirationPolicy
    }

    // Sets the expiration policy of the cache.
    func setExpirationPolicy(expirationPolicy: ExpirationPolicy<Key, TimeInterval>) {
        self._expirationPolicy = expirationPolicy
    }

    // Returns the expiration timer of the cache.
    func expirationTimer() -> Timer? {
        return self._expirationTimer
    }

    // Sets the expiration timer of the cache.
    func setExpirationTimer(expirationTimer: Timer?) {
        self._expirationTimer = expirationTimer
    }

    // Returns the expiration time of the given key, or nil if not found.
    func expiration(key: Key) -> TimeInterval? {
        return self._expiration[key]
    }

    // Sets the expiration time of the given key.
    func setExpiration(expiration: TimeInterval, key: Key) {
        self._expiration[key] = expiration
        self._expirationPolicy.put(key: key, expiration: expiration)
    }

    // Returns the expiration time of the given key, or nil if not found.
    func expiration(key: Key) -> TimeInterval? {
        return self._expiration[key]
    }

    // Sets the expiration time of the given key.
    func setExpiration(expiration: TimeInterval, key: Key) {
        self._expiration[key] = expiration
        self._expirationPolicy.put(key: key, expiration: expiration)
    }

    // Returns the expiration time of the given key, or nil if not found.
    func expiration(key: Key) -> TimeInterval? {
        return self._expiration[key]
    }

    // Sets the expiration time of the given key.
    func setExpiration(expiration: TimeInterval, key: Key) {
        self._expiration[key] = expiration
        self._expirationPolicy.put(key: key, expiration: expiration)
    }

    // Returns the expiration time of the given key, or nil if not found.
    func expiration

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var _cache: Dictionary<Key, Value> = Dictionary()
    private var _expiration: Dictionary<Key, TimeInterval> = Dictionary()
    
    // Add a new item to the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
    }
    
    // Get an item from the cache.
    func get(key: Key) -> Value? {
        let expiration = _expiration[key]
        if expiration == nil {
            return nil
        }
        if expiration! < Date.now.timeIntervalSinceDate {
            _cache.remove(_key: key)
            _expiration.remove(_key: key)
            return nil
        }
        return _cache[key]
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var _cache: Dictionary<Key, Value> = Dictionary()
    private var _expiration: Dictionary<Key, TimeInterval> = Dictionary()
    
    // Add a new item to the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
    }
    
    // Get an item from the cache.
    func get(key: Key) -> Value? {
        let expiration = _expiration[key]
        if expiration == nil {
            return nil
        }
        if expiration! < Date.now.timeIntervalSinceDate {
            _cache.remove(_key: key)
            _expiration.remove(_key: key)
            return nil
        }
        return _cache[key]
    }
}
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>
    : ExpirableCacheProtocol {
    
    // Cache entries.
    // Keys are hashed to avoid collisions.
    var cache: Dictionary<Key, Value> = Dictionary()
    
    // Cache expiration time.
    // Keys are hashed to avoid collisions.
    var expirationCache: Dictionary<Key, TimeInterval> = Dictionary()
    
    // Expiration time in seconds.
    var expiration: TimeInterval = 0
    
    // Cache size limit.
    // Keys are hashed to avoid collisions.
    var sizeLimit: Int = 0
    
    // Cache size.
    var size: Int = 0
    
    // Cache eviction policy.
    // Keys are hashed to avoid collisions.
    var evictionPolicy: EvictionPolicy<Key, Value> = LRU()
    
    // Add entry to the cache.
    // If the cache is full, remove the oldest entry.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        // Remove the oldest entry if the cache is full.
        if sizeLimit > 0 && size >= sizeLimit {
            evictionPolicy.evict(self)
        }
        
        // Add the entry to the cache.
        cache[key] = value
        expirationCache[key] = expiration
        size += 1
    }
    
    // Get entry from the cache.
    // If the entry is expired, remove it from the cache.
    func get(key: Key) -> Value? {
        // Get the entry from the cache.
        let value = cache[key]
        
        // If the entry is not found, return nil.
        if value == nil {
            return nil
        }
        
        // Get the expiration time from the expiration cache.
        let expiration = expirationCache[key]
        
        // If the entry is expired, remove it from the cache.
        if expiration < Date.now.timeIntervalSinceDate {
            evictionPolicy.evict(self)
            return nil
        }
        
        // Return the entry.
        return value
    }
}

protocol EvictionPolicy<Key: Hashable, Value> {
    func evict(cache: ExpirableCache<Key, Value>)
}

class LRU<Key: Hashable, Value> : EvictionPolicy<Key, Value> {
    // Remove the oldest entry from the cache.
    func evict(cache: ExpirableCache<Key, Value>) {
        // Get the oldest entry from the cache.
        let oldestKey = cache.expirationCache.keys.first
        
        // Remove the oldest entry from the cache.
        cache.cache.remove(oldestKey)
        cache.expirationCache.remove(oldestKey)
        cache.size -= 1
    }
}

class LFU<Key: Hashable, Value> : EvictionPolicy<Key, Value> {
    // Remove the least frequently used entry from the cache.
    func evict(cache: ExpirableCache<Key, Value>) {
        // Get the least frequently used entry from the cache.
        let leastFrequentKey = cache.expirationCache.keys.last
        
        // Remove the least frequently used entry from the cache.
        cache.cache.remove(leastFrequentKey)
        cache.expirationCache.remove(leastFrequentKey)
        cache.size -= 1
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>
    : ExpirableCacheProtocol {
    
    // Cache entries.
    // Keys are hashed to avoid collisions.
    var cache: Dictionary<Key, Value> = Dictionary()
    
    // Cache expiration time.
    // Keys are hashed to avoid collisions.
    var expirationCache: Dictionary<Key, TimeInterval> = Dictionary()
    
    // Expiration time in seconds.
    var expiration: TimeInterval = 0
    
    // Cache size limit.
    // Keys are hashed to avoid collisions.
    var sizeLimit: Int = 0
    
    // Cache size.
    var size: Int = 0
    
    // Cache eviction policy.
    // Keys are hashed to avoid collisions.
    var evictionPolicy: EvictionPolicy<Key, Value> = LRU()
    
    // Add entry to the cache.
    // If the cache is full, remove the oldest entry.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        // Remove the oldest entry if the cache is full.
        if sizeLimit > 0 && size >= sizeLimit {
            evictionPolicy.evict(self)
        }
        
        // Add the entry to the cache.
        cache[key] = value
        expirationCache[key] = expiration
        size += 1
    }
    
    // Get entry from the cache.
    // If the entry is expired, remove it from the cache.
    func get(key: Key) -> Value? {
        // Get the entry from the cache.
        let value = cache[key]
        
        // If the entry is not found, return nil.
        if value == nil {
            return nil
        }
        
        // Get the expiration time from the expiration cache.
        let expiration = expirationCache[key]
        
        // If the entry is expired, remove it from the cache.
        if expiration < Date.now.timeIntervalSinceDate {
            evictionPolicy.evict(self)
            return nil
        }
        
        // Return the entry.
        return value
    }
}

// Eviction policy.
protocol EvictionPolicy<Key: Hashable, Value> {
    func evict(cache: ExpirableCache<Key, Value>)
}

// Least Recently Used (LRU) eviction policy.
class LRU<Key: Hashable, Value> : EvictionPolicy<Key, Value> {
    // Remove the oldest entry from the cache.
    func evict(cache: ExpirableCache<Key, Value>) {
        // Get the oldest entry from the cache.
        let oldestKey = cache.expirationCache.keys.first
        
        // Remove the oldest entry from the cache.
        cache.cache.remove(oldestKey)
        cache.expirationCache.remove(oldestKey)
        cache.size -= 1
    }
}

// Least Recently Used (LRU) eviction policy.
class LFU<Key: Hashable, Value> : EvictionPolicy<Key, Value> {
    // Remove the least frequently used entry from the cache.
    func evict(cache: ExpirableCache<Key, Value>) {
        // Get the least frequently used entry from the cache.
        let leastFrequentKey = cache.expirationCache.keys.last
        
        // Remove the least frequently used entry from the cache.
        cache.cache.remove(leastFrequentKey)
        cache.expirationCache.remove(leastFrequentKey)
        cache.size -= 1
    }
}

// Least Frequently Used (LFU) eviction policy.
class LFU<Key: Hashable, Value> : EvictionPolicy<Key, Value> {
    // Remove the least frequently used entry from the cache.
    func evict(cache: ExpirableCache<Key, Value>) {
        // Get the least frequently used entry from the cache.
        let leastFrequentKey = cache.expirationCache.keys.last
        
        // Remove the least frequently used entry from the cache.
        cache.cache.remove(leastFrequentKey)
        cache.expirationCache.remove(leastFrequentKey)
        cache.size -= 1
    }
}

// Least Frequently Used (LFU) eviction policy.
class LFU<Key: Hashable, Value> : EvictionPolicy<Key, Value> {
    // Remove the least frequently used entry from the cache.
    func evict(cache: ExpirableCache<Key, Value>) {
        // Get the least frequently used entry from

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: Dictionary<Key, Value> = Dictionary()
    private var expirationMap: Dictionary<Key, TimeInterval> = Dictionary()
    
    override func put(value: Value, key: Key, expiration: TimeInterval) {
        if let existingValue = cache[key] {
            expirationMap[key] = expiration
        } else {
            cache[key] = value
            expirationMap[key] = expiration
        }
    }
    
    override func get(key: Key) -> Value? {
        if let value = cache[key] {
            let expiration = expirationMap[key]
            if expiration > 0 && expiration < TimeInterval.timeIntervalSinceNow {
                cache.remove(key)
                expirationMap.remove(key)
                return nil
            }
            return value
        }
        return nil
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: Dictionary<Key, Value> = Dictionary()
    private var expirationMap: Dictionary<Key, TimeInterval> = Dictionary()
    
    override func put(value: Value, key: Key, expiration: TimeInterval) {
        if let existingValue = cache[key] {
            expirationMap[key] = expiration
        } else {
            cache[key] = value
            expirationMap[key] = expiration
        }
    }
    
    override func get(key: Key) -> Value? {
        if let value = cache[key] {
            let expiration = expirationMap[key]
            if expiration > 0 && expiration < TimeInterval.timeIntervalSinceNow {
                cache.remove(key)
                expirationMap.remove(key)
                return nil
            }
            return value
        }
        return nil
    }
}

// Example usage:
let cache = ExpirableCache<String, Int>()
cache.put(1, "key1", 10)
print(cache.get("key1")) // Outputs: 1
print(cache.get("key2")) // Outputs: nil (key not found)
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    var cache: Dictionary<Key, Value> = Dictionary()
    var expiration: TimeInterval = 0
    var evictionPolicy: EvictionPolicy = EvictionPolicy.FIFO
    var evictionQueue: Queue<Key> = Queue()
    var evictionQueueLock: Lock = Lock()
    var cacheLock: Lock = Lock()

    // Subscript methods used for convenient access.
    public init(expiration: TimeInterval) {
        self.expiration = expiration
    }
    public init(expiration: TimeInterval, evictionPolicy: EvictionPolicy) {
        self.expiration = expiration
        self.evictionPolicy = evictionPolicy
    }

    // Puts value into cache with specified expiration.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        guard let key = key else {
            fatalError("Key must not be nil")
        }
        guard let value = value else {
            fatalError("Value must not be nil")
        }
        guard expiration > 0 else {
            fatalError("Expiration must be positive")
        }
        guard expiration <= self.expiration else {
            fatalError("Expiration must be less than or equal to expiration time")
        }
        guard let cacheLock = cacheLock else {
            fatalError("Cache lock must not be nil")
        }
        guard let evictionQueueLock = evictionQueueLock else {
            fatalError("Eviction queue lock must not be nil")
        }
        guard let cache = cache else {
            fatalError("Cache must not be nil")
        }
        guard let evictionQueue = evictionQueue else {
            fatalError("Eviction queue must not be nil")
        }
        guard let expiration = expiration else {
            fatalError("Expiration must not be nil")
        }
        guard let expiration = expiration else {
            fatalError("Expiration must not be nil")
        }

        // Lock cache and eviction queue.
        cacheLock.lock()
        evictionQueueLock.lock()
        try {
            // Add key to eviction queue.
            evictionQueue.enqueue(key)
            // Add key-value pair to cache.
            cache[key] = value
            // Remove expired keys from cache.
            self.evictExpiredKeys(expiration)
        } catch {
            // Unlock cache and eviction queue.
            cacheLock.unlock()
            evictionQueueLock.unlock()
        }
    }

    // Gets value from cache.
    func get(key: Key) -> Value? {
        guard let key = key else {
            fatalError("Key must not be nil")
        }
        guard let cacheLock = cacheLock else {
            fatalError("Cache lock must not be nil")
        }
        guard let cache = cache else {
            fatalError("Cache must not be nil")
        }

        // Lock cache.
        cacheLock.lock()
        try {
            // Get value from cache.
            let value = cache[key]
            // Unlock cache.
            cacheLock.unlock()
            // Return value.
            return value
        } catch {
            // Unlock cache.
            cacheLock.unlock()
        }
    }

    // Evicts expired keys from cache.
    func evictExpiredKeys(expiration: TimeInterval) {
        guard let evictionQueueLock = evictionQueueLock else {
            fatalError("Eviction queue lock must not be nil")
        }
        guard let cacheLock = cacheLock else {
            fatalError("Cache lock must not be nil")
        }
        guard let cache = cache else {
            fatalError("Cache must not be nil")
        }
        guard let evictionQueue = evictionQueue else {
            fatalError("Eviction queue must not be nil")
        }

        // Lock cache and eviction queue.
        cacheLock.lock()
        evictionQueueLock.lock()
        try {
            // Evict expired keys.
            while let key = evictionQueue.dequeue() {
                if let value = cache[key] {
                    if value.expiration < TimeInterval(timeIntervalSinceNow: expiration) {
                        // Remove key-value pair from cache.
                        cache.remove(forKey: key)
                    }
                }
            }
        } catch {
            // Unlock cache and eviction queue.
            cacheLock.unlock()
            evictionQueueLock.unlock()
        }
    }

    // Returns the number of keys in the cache.
    func count() -> Int {
        guard let cacheLock = cacheLock else {
            fatalError("Cache

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>
    : ExpirableCacheProtocol {
    
    // Dictionary of key-value pairs.
    // Keys are used as indices.
    // Values are the actual data.
    var cache: Dictionary<Key, Value>
    
    // Time interval in seconds.
    // Used for expiration.
    var expiration: TimeInterval
    
    // Initializer for the cache.
    // Initializes the dictionary and expiration time.
    init(expiration: TimeInterval) {
        self.cache = Dictionary()
        self.expiration = expiration
    }
    
    // Puts a value into the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        // Add the key-value pair to the dictionary.
        self.cache[key] = value
        
        // Set the expiration time for the key.
        self.cache[key]?.expiration = TimeInterval(expiration)
    }
    
    // Retrieves a value from the cache.
    // Returns nil if the key is not found or expired.
    func get(key: Key) -> Value? {
        // Get the value from the dictionary.
        let value = self.cache[key]
        
        // Check if the value exists and has not expired.
        if value != nil && value.expiration > TimeInterval(0) {
            // Calculate the remaining time until expiration.
            let remaining = value.expiration - TimeInterval(0)
            
            // If the remaining time is less than or equal to the expiration time,
            // remove the key-value pair from the dictionary.
            if remaining <= expiration {
                self.cache[key] = nil
            } else {
                // Update the expiration time for the key.
                self.cache[key]?.expiration = remaining
            }
        }
        
        // Return the value if found and not expired.
        return value
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>
    : ExpirableCacheProtocol {
    
    // Dictionary of key-value pairs.
    // Keys are used as indices.
    // Values are the actual data.
    var cache: Dictionary<Key, Value>
    
    // Time interval in seconds.
    // Used for expiration.
    var expiration: TimeInterval
    
    // Initializer for the cache.
    // Initializes the dictionary and expiration time.
    init(expiration: TimeInterval) {
        self.cache = Dictionary()
        self.expiration = expiration
    }
    
    // Puts a value into the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        // Add the key-value pair to the dictionary.
        self.cache[key] = value
        
        // Set the expiration time for the key.
        self.cache[key]?.expiration = TimeInterval(expiration)
    }
    
    // Retrieves a value from the cache.
    // Returns nil if the key is not found or expired.
    func get(key: Key) -> Value? {
        // Get the value from the dictionary.
        let value = self.cache[key]
        
        // Check if the value exists and has not expired.
        if value != nil && value.expiration > TimeInterval(0) {
            // Calculate the remaining time until expiration.
            let remaining = value.expiration - TimeInterval(0)
            
            // If the remaining time is less than or equal to the expiration time,
            // remove the key-value pair from the dictionary.
            if remaining <= expiration {
                self.cache[key] = nil
            } else {
                // Update the expiration time for the key.
                self.cache[key]?.expiration = remaining
            }
        }
        
        // Return the value if found and not expired.
        return value
    }
}

// Example usage:
let cache = ExpirableCache<String, Int>(expiration: 10)

// Put values into the cache with expiration.
cache.put(value: 1, key: "key1", expiration: 5)
cache.put(value: 2, key: "key2", expiration: 10)

// Get values from the cache.
print("Value for key1:", cache.get("key1")) // Output: Value for key1: 1
print("Value for key2:", cache.get("key2")) // Output: Value for key2: 2

// Wait for a short time to simulate expiration.
sleep(TimeInterval(2))

// Get values from the cache again.
print("Value for key1:", cache.get("key1")) // Output: Value for key1: nil
print("Value for key2:", cache.get("key2")) // Output: Value for key2: 2

// Wait for a short time to simulate expiration.
sleep(TimeInterval(2))

// Get values from the cache again.
print("Value for key1:", cache.get("key1")) // Output: Value for key1: nil
print("Value for key2:", cache.get("key2")) // Output: Value for key2: nil

```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>
    : ExpirableCacheProtocol {
    // Key -> (Value, TimeStamp)
    private var cache: Map<Key, (Value, TimeStamp)> = Map()
    // Key -> TimeStamp
    private var expiration: Map<Key, TimeStamp> = Map()

    // ExpirableCacheProtocol
    func put(value: Value, key: Key, expiration: TimeInterval) {
        let now = Time()
        self.cache[key] = (value, now + expiration)
        self.expiration[key] = now + expiration
    }

    func get(key: Key) -> Value? {
        let now = Time()
        let (value, expiration) = self.cache[key]
        if expiration > now {
            return value
        } else {
            self.cache.remove(key)
            self.expiration.remove(key)
            return nil
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>
    : ExpirableCacheProtocol {
    // Key -> (Value, TimeStamp)
    private var cache: Map<Key, (Value, TimeStamp)> = Map()
    // Key -> TimeStamp
    private var expiration: Map<Key, TimeStamp> = Map()

    // ExpirableCacheProtocol
    func put(value: Value, key: Key, expiration: TimeInterval) {
        let now = Time()
        self.cache[key] = (value, now + expiration)
        self.expiration[key] = now + expiration
    }

    func get(key: Key) -> Value? {
        let now = Time()
        let (value, expiration) = self.cache[key]
        if expiration > now {
            return value
        } else {
            self.cache.remove(key)
            self.expiration.remove(key)
            return nil
        }
    }
}
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    var _cache: Map<Key, Value>
    var _expiration: Map<Key, TimeInterval>
    var _expirationPolicy: ExpirationPolicy

    init(expirationPolicy: ExpirationPolicy = ExpirationPolicy.FIFO) {
        _cache = Map<Key, Value>()
        _expiration = Map<Key, TimeInterval>()
        _expirationPolicy = expirationPolicy
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
    }

    func get(key: Key) -> Value? {
        let expiration = _expiration[key]
        if expiration == nil {
            return nil
        }
        if expiration! < Date.now.timeIntervalSinceDate {
            _cache.remove(key)
            _expiration.remove(key)
            return nil
        }
        return _cache[key]
    }

    func remove(key: Key) {
        _cache.remove(key)
        _expiration.remove(key)
    }
    
    func clear() {
        _cache.clear()
        _expiration.clear()
    }
}

enum ExpirationPolicy {
    // FIFO (first-in-first-out)
    // LRU (least-recently-used)
    // LFU (least-frequently-used)
    FIFO,
    LRU,
    LFU
}

extension ExpirableCache {
    func _evict(policy: ExpirationPolicy) {
        let keys = _cache.keys.sorted()
        switch policy {
            case ExpirationPolicy.FIFO:
                for key in keys {
                    _evictOne(key)
                }
            case ExpirationPolicy.LRU:
                for key in keys {
                    _evictOne(key)
                }
            case ExpirationPolicy.LFU:
                let frequencies = Map<Value, Int>()
                for key in keys {
                    let value = _cache[key]
                    let frequency = frequencies[value]! + 1
                    frequencies[value] = frequency
                }
                let leastFrequent = frequencies.keys.sorted()[0]
                for key in keys {
                    let value = _cache[key]
                    if value == leastFrequent {
                        _evictOne(key)
                    }
                }
        }
    }

    func _evictOne(key: Key) {
        _cache.remove(key)
        _expiration.remove(key)
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    var _cache: Map<Key, Value>
    var _expiration: Map<Key, TimeInterval>
    var _expirationPolicy: ExpirationPolicy

    init(expirationPolicy: ExpirationPolicy = ExpirationPolicy.FIFO) {
        _cache = Map<Key, Value>()
        _expiration = Map<Key, TimeInterval>()
        _expirationPolicy = expirationPolicy
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
    }

    func get(key: Key) -> Value? {
        let expiration = _expiration[key]
        if expiration == nil {
            return nil
        }
        if expiration! < Date.now.timeIntervalSinceDate {
            _cache.remove(key)
            _expiration.remove(key)
            return nil
        }
        return _cache[key]
    }

    func remove(key: Key) {
        _cache.remove(key)
        _expiration.remove(key)
    }
    
    func clear() {
        _cache.clear()
        _expiration.clear()
    }
}

enum ExpirationPolicy {
    // FIFO (first-in-first-out)
    // LRU (least-recently-used)
    // LFU (least-frequently-used)
    FIFO,
    LRU,
    LFU
}

extension ExpirableCache {
    func _evict(policy: ExpirationPolicy) {
        let keys = _cache.keys.sorted()
        switch policy {
            case ExpirationPolicy.FIFO:
                for key in keys {
                    _evictOne(key)
                }
            case ExpirationPolicy.LRU:
                for key in keys {
                    _evictOne(key)
                }
            case ExpirationPolicy.LFU:
                let frequencies = Map<Value, Int>()
                for key in keys {
                    let value = _cache[key]
                    let frequency = frequencies[value]! + 1
                    frequencies[value] = frequency
                }
                let leastFrequent = frequencies.keys.sorted()[0]
                for key in keys {
                    let value = _cache[key]
                    if value == leastFrequent {
                        _evictOne(key)
                    }
                }
        }
    }

    func _evictOne(key: Key) {
        _cache.remove(key)
        _expiration.remove(key)
    }
}
```

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    var cache: Dictionary<Key, Value> = Dictionary()
    var expiration: TimeInterval = 0
    var evictionPolicy: EvictionPolicy = EvictionPolicy.leastRecentlyUsed
    var evictionQueue: Queue<Key> = Queue()
    var evictions: Int = 0
    var hits: Int = 0
    var misses: Int = 0

    func put(value: Value, key: Key, expiration: TimeInterval) {
        if expiration == 0 {
            expiration = self.expiration
        }
        self.cache[key] = value
        self.evictionQueue.enqueue(key)
        self.evictions = 0
        self.evictionPolicy = EvictionPolicy.leastRecentlyUsed
        self.expiration = expiration
    }

    func get(key: Key) -> Value? {
        let value = self.cache[key]
        if value != nil {
            self.hits += 1
            return value
        }
        self.misses += 1
        return nil
    }

    func __getitem__(key: Key) -> Value? {
        return self.get(key)
    }

    func __setitem__(key: Key, value: Value) {
        self.put(value, key, 0)
    }

    func __delitem__(key: Key) {
        self.evictionQueue.remove(key)
        self.cache.remove(key)
    }
}

enum EvictionPolicy {
    // Least recently used eviction policy.
    // Evicts the least recently used key.
    // If the cache is full, evicts the least recently used key.
    // If the cache is empty, does nothing.
    @differentiable
    leastRecentlyUsed
}

extension ExpirableCache<Key: Hashable, Value: Expirable> {
    func evict() {
        if self.evictionPolicy == EvictionPolicy.leastRecentlyUsed {
            let key = self.evictionQueue.dequeue()
            self.cache.remove(key)
            self.evictions += 1
        }
    }
}

```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    var cache: Dictionary<Key, Value> = Dictionary()
    var expiration: TimeInterval = 0
    var evictionPolicy: EvictionPolicy = EvictionPolicy.leastRecentlyUsed
    var evictionQueue: Queue<Key> = Queue()
    var evictions: Int = 0
    var hits: Int = 0
    var misses: Int = 0

    func put(value: Value, key: Key, expiration: TimeInterval) {
        if expiration == 0 {
            expiration = self.expiration
        }
        self.cache[key] = value
        self.evictionQueue.enqueue(key)
        self.evictions = 0
        self.evictionPolicy = EvictionPolicy.leastRecentlyUsed
        self.expiration = expiration
    }

    func get(key: Key) -> Value? {
        let value = self.cache[key]
        if value != nil {
            self.hits += 1
            return value
        }
        self.misses += 1
        return nil
    }

    func __getitem__(key: Key) -> Value? {
        return self.get(key)
    }

    func __setitem__(key: Key, value: Value) {
        self.put(value, key, 0)
    }

    func __delitem__(key: Key) {
        self.evictionQueue.remove(key)
        self.cache.remove(key)
    }
}

enum EvictionPolicy {
    // Least recently used eviction policy.
    // Evicts the least recently used key.
    // If the cache is full, evicts the least recently used key.
    // If the cache is empty, does nothing.
    @differentiable
    leastRecentlyUsed
}

extension ExpirableCache<Key: Hashable, Value: Expirable> {
    func evict() {
        if self.evictionPolicy == EvictionPolicy.leastRecentlyUsed {
            let key = self.evictionQueue.dequeue()
            self.cache.remove(key)
            self.evictions += 1
        }
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

class Decryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

class EncryptorDecryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

class EncryptorDecryptor2: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

class EncryptorDecryptor3: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Decryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class EncryptorDecryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class EncryptorDecryptor2: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class EncryptorDecryptor3: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData += (data[i] ^ key[i % key.length])
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class EncryptorDecryptor4: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.length {
            encryptedData += (string[i] ^ key[i % key.length])
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for i in 0..<data.length {
            decryptedData

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    var key: String
    init(key: String) {
        self.key = key
    }
    func encrypt(_ string: String) -> Data {
        let data = String(string: string, encoding: .utf8)
        let encryptedData = data.map({
            let binaryString = String(data: String(bitString: $0, length: 8), encoding: .utf8)
            let encryptedBinaryString = binaryString.map({
                let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                let encryptedBinaryString = encryptedBinaryString.map({
                    let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                    let encryptedBinaryString = encryptedBinaryString.map({
                        let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                        let encryptedBinaryString = encryptedBinaryString.map({
                            let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                            let encryptedBinaryString = encryptedBinaryString.map({
                                let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                let encryptedBinaryString = encryptedBinaryString.map({
                                    let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                    let encryptedBinaryString = encryptedBinaryString.map({
                                        let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                        let encryptedBinaryString = encryptedBinaryString.map({
                                            let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                            let encryptedBinaryString = encryptedBinaryString.map({
                                                let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                let encryptedBinaryString = encryptedBinaryString.map({
                                                    let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                    let encryptedBinaryString = encryptedBinaryString.map({
                                                        let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                        let encryptedBinaryString = encryptedBinaryString.map({
                                                            let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                            let encryptedBinaryString = encryptedBinaryString.map({
                                                                let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                let encryptedBinaryString = encryptedBinaryString.map({
                                                                    let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                    let encryptedBinaryString = encryptedBinaryString.map({
                                                                        let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                        let encryptedBinaryString = encryptedBinaryString.map({
                                                                            let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                            let encryptedBinaryString = encryptedBinaryString.map({
                                                                                let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                                let encryptedBinaryString = encryptedBinaryString.map({
                                                                                    let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                                    let encryptedBinaryString = encryptedBinaryString.map({
                                                                                        let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                                        let encryptedBinaryString = encryptedBinaryString.map({
                                                                                            let encryptedBinaryString = String(data: String(bitString: $0, encoding: .utf8), encoding: .utf8)
                                                                                            let encryptedBinaryString

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    var key = ""
    var keyLength = 0
    var keyIndex = 0
    var keyChar = ""
    var keyCharIndex = 0
    var keyCharIndexModKeyLength = 0
    var keyCharIndexModKeyLengthAsInt = 0
    var keyCharAsInt = 0
    var keyCharAsIntAsBinary = ""
    var keyCharAsIntAsBinaryLength = 0
    var keyCharAsIntAsBinaryLengthAsInt = 0
    var keyCharAsIntAsBinaryAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinary = ""
    var keyCharAsIntAsBinaryAsIntAsBinaryLength = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryLengthAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinary = ""
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryLength = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryLengthAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinary = ""
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryLength = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryLengthAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinary = ""
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryLength = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinary = ""
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinary = ""
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsIntAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsIntAsIntAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsIntAsIntAsIntAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsIntAsIntAsIntAsIntAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsIntAsIntAsIntAsIntAsIntAsIntAsInt = 0
    var keyCharAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsBinaryAsIntAsIntAsIntAsIntAs

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

class Decryptor: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

class EncryptorDecryptor: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

class EncryptorDecryptor2: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

class EncryptorDecryptor3: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Decryptor: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class EncryptorDecryptor: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class EncryptorDecryptor2: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class EncryptorDecryptor3: EncryptorProtocol {
    var key: String
    
    init(key: String) {
        self.key = key
    }
    
    func encrypt(_ string: String) -> Data {
        let bytes = Data(bytes: string.data(using: .utf8))
        let encryptedBytes = bytes.map { byte in byte ^ self.key.firstCharacterInString.asciiCode }
        return encryptedBytes
    }
    
    func decrypt(_ data: Data) -> String {
        let bytes = Data(bytes: data.map { byte in byte ^ self.key.firstCharacterInString.asciiCode })
        let decryptedString = String(data: bytes.data(using: .utf8))
        return decryptedString
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.count {
            var char: Character = string[i]
            var encryptedChar: Character = char ^ key[i % key.count]
            encryptedData += encryptedChar
        }
        return encryptedData
    }
    
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            var char: Character = data[i]
            var decryptedChar: Character = char ^ key[i % key.count]
            decryptedString += decryptedChar
        }
        return decryptedString
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for i in 0..<string.count {
            var char: Character = string[i]
            var encryptedChar: Character = char ^ key[i % key.count]
            encryptedData += encryptedChar
        }
        return encryptedData
    }
    
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            var char: Character = data[i]
            var decryptedChar: Character = char ^ key[i % key.count]
            decryptedString += decryptedChar
        }
        return decryptedString
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    var key = ""
    func encrypt(_ string: String, key: String) -> Data {
        var data = Data()
        var key = key.repeating(count: string.length)
        for i in 0..<string.length {
            data.append(string[i] ^ key[i])
        }
        return data
    }
    func decrypt(_ data: Data, key: String) -> String {
        var key = key.repeating(count: data.length)
        var decryptedString = ""
        for i in 0..<data.length {
            decryptedString += data[i] ^ key[i]
        }
        return decryptedString
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    var key = ""
    func encrypt(_ string: String, key: String) -> Data {
        var data = Data()
        var key = key.repeating(count: string.length)
        for i in 0..<string.length {
            data.append(string[i] ^ key[i])
        }
        return data
    }
    func decrypt(_ data: Data, key: String) -> String {
        var key = key.repeating(count: data.length)
        var decryptedString = ""
        for i in 0..<data.length {
            decryptedString += data[i] ^ key[i]
        }
        return decryptedString
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    var key: String = ""
    var keyLength: Int = 0
    var keyIndex: Int = 0
    var keyBytes: [Byte] = [Byte]()
    var keyBytesLength: Int = 0
    var keyBytesIndex: Int = 0
    var keyBytesIndexModKeyLength: Int = 0
    var keyBytesIndexModKeyLengthMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne: Int = 0
    var keyBytesIndexModKeyLengthMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOneMinusOne

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(charCode: encryptedCharCode))
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(charCode: decryptedCharCode))
        }
        return decryptedData
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(charCode: encryptedCharCode))
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(charCode: decryptedCharCode))
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(charCode: encryptedCharCode))
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(charCode: decryptedCharCode))
        }
        return decryptedData
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    var key: String = "1234567890"

    func encrypt(_ string: String) -> Data {
        var encryptedData: Data = Data()
        for i in 0..<string.count {
            let char: String = string[i]
            let charCode: Int = char.codePointAt(0)
            let encryptedCharCode: Int = charCode ^ key.codePointAt(i % key.count)
            let encryptedChar: String = String(characters: [String(character: String(from: encryptedCharCode))])
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }

    func decrypt(_ data: Data) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            let encryptedChar: String = data[i]
            let encryptedCharCode: Int = encryptedChar.codePointAt(0)
            let decryptedCharCode: Int = encryptedCharCode ^ key.codePointAt(i % key.count)
            let decryptedChar: String = String(characters: [String(character: String(from: decryptedCharCode))])
            decryptedString += decryptedChar
        }
        return decryptedString
    }
}

class Decryptor: EncryptorProtocol {
    var key: String = "1234567890"

    func encrypt(_ string: String) -> Data {
        var encryptedData: Data = Data()
        for i in 0..<string.count {
            let char: String = string[i]
            let charCode: Int = char.codePointAt(0)
            let encryptedCharCode: Int = charCode ^ key.codePointAt(i % key.count)
            let encryptedChar: String = String(characters: [String(character: String(from: encryptedCharCode))])
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }

    func decrypt(_ data: Data) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            let encryptedChar: String = data[i]
            let encryptedCharCode: Int = encryptedChar.codePointAt(0)
            let decryptedCharCode: Int = encryptedCharCode ^ key.codePointAt(i % key.count)
            let decryptedChar: String = String(characters: [String(character: String(from: decryptedCharCode))])
            decryptedString += decryptedChar
        }
        return decryptedString
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    var key: String = "1234567890"

    func encrypt(_ string: String) -> Data {
        var encryptedData: Data = Data()
        for i in 0..<string.count {
            let char: String = string[i]
            let charCode: Int = char.codePointAt(0)
            let encryptedCharCode: Int = charCode ^ key.codePointAt(i % key.count)
            let encryptedChar: String = String(characters: [String(character: String(from: encryptedCharCode))])
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }

    func decrypt(_ data: Data) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            let encryptedChar: String = data[i]
            let encryptedCharCode: Int = encryptedChar.codePointAt(0)
            let decryptedCharCode: Int = encryptedCharCode ^ key.codePointAt(i % key.count)
            let decryptedChar: String = String(characters: [String(character: String(from: decryptedCharCode))])
            decryptedString += decryptedChar
        }
        return decryptedString
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Decryptor: EncryptorProtocol {
    var key: String = "1234567890"

    func encrypt(_ string: String) -> Data {
        var encryptedData: Data = Data()
        for i in 0..<string.count {
            let char: String = string[i]
            let charCode: Int = char.codePointAt(0)
            let encryptedCharCode: Int = charCode ^ key.codePointAt(i % key.count)
            let encryptedChar: String = String(characters: [String(character: String(from: encryptedCharCode))])
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }

    func decrypt(_ data: Data) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            let encryptedChar: String = data[i]
            let encryptedCharCode: Int = encryptedChar.codePointAt(0)
            let decryptedCharCode: Int = encryptedCharCode ^ key.codePointAt(i % key.count)
            let decryptedChar: String = String(characters: [String(character: String(from: decryptedCharCode))])
            decryptedString += decryptedChar
        }
        return decryptedString
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(contents: String(char: String(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return encryptedData
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(contents: String(char: String(charCode: decryptedCharCode)), encoding: .utf8))
        }
        return decryptedData
    }
}

```swift
protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(contents: String(char: String(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return encryptedData
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(contents: String(char: String(charCode: decryptedCharCode)), encoding: .utf8))
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(contents: String(char: String(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return encryptedData
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(contents: String(char: String(charCode: decryptedCharCode)), encoding: .utf8))
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(contents: String(char: String(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return encryptedData
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(contents: String(char: String(charCode: decryptedCharCode)), encoding: .utf8))
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData: Data = ""
        for char in string: {
            let charCode: Int = char.codePointAt(0)!
            let encryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            encryptedData += String(contents: String(contents: String(char: String(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return encryptedData
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData: String = ""
        for char in data: {
            let charCode: Int = char.codePointAt(0)!
            let decryptedCharCode: Int = charCode ^ key.codePointAt(0)!
            decryptedData += String(contents: String(contents: String(char: String(charCode: decryptedCharCode)), encoding: .utf8))
        }
        return decryptedData
    }
}

// Simple XOR encryptor and decry

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval
    private var requestCount: Int
    
    // Initializes a new rate limiter with the given maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = TimeInterval(0)
        self.requestCount = 0
    }
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        var now = TimeInterval(Date.now.timeIntervalSinceDate(self.lastRequestTime))
        if now < self.timeInterval {
            self.requestCount += 1
            if self.requestCount > self.maxRequests {
                return false
            }
        } else {
            self.requestCount = 1
        }
        self.lastRequestTime = TimeInterval(Date.now)
        return true
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval
    private var requestCount: Int
    
    // Initializes a new rate limiter with the given maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = TimeInterval(0)
        self.requestCount = 0
    }
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        var now = TimeInterval(Date.now.timeIntervalSinceDate(self.lastRequestTime))
        if now < self.timeInterval {
            self.requestCount += 1
            if self.requestCount > self.maxRequests {
                return false
            }
        } else {
            self.requestCount = 1
        }
        self.lastRequestTime = TimeInterval(Date.now)
        return true
    }
}

// Example usage:
let rateLimiter = RateLimiter(maxRequests: 5, timeInterval: 10)
if rateLimiter.allowRequest() {
    // Do something
} else {
    // Rate limit exceeded
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requests: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requests = 0
        self._lastRequestTime = TimeInterval(0)
    }

    func allowRequest() -> Bool {
        // If the time since the last request is greater than the time interval, allow the request
        if TimeInterval(Date().timeIntervalSinceDate(self._lastRequestTime)) > self._timeInterval {
            self._requests = 0
            self._lastRequestTime = TimeInterval(Date().timeIntervalSinceDate(self._lastRequestTime))
            return true
        }

        // If the number of requests is less than the maximum, allow the request
        if self._requests < self._maxRequests {
            self._requests += 1
            self._lastRequestTime = TimeInterval(Date().timeIntervalSinceDate(self._lastRequestTime))
            return true
        }

        // If the number of requests is equal to the maximum, deny the request
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requests: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requests = 0
        self._lastRequestTime = TimeInterval(0)
    }

    func allowRequest() -> Bool {
        // If the time since the last request is greater than the time interval, allow the request
        if TimeInterval(Date().timeIntervalSinceDate(self._lastRequestTime)) > self._timeInterval {
            self._requests = 0
            self._lastRequestTime = TimeInterval(Date().timeIntervalSinceDate(self._lastRequestTime))
            return true
        }

        // If the number of requests is less than the maximum, allow the request
        if self._requests < self._maxRequests {
            self._requests += 1
            self._lastRequestTime = TimeInterval(Date().timeIntervalSinceDate(self._lastRequestTime))
            return true
        }

        // If the number of requests is equal to the maximum, deny the request
        return false
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requests: Int
    private var lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requests = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        // Check if the time interval has passed since the last request.
        if TimeInterval(Date.now.timeIntervalSinceDate(self.lastRequestTime)) >= self.timeInterval {
            // Reset the request count and time interval.
            self.requests = 0
            self.lastRequestTime = TimeInterval(Date.now.timeIntervalSinceDate(TimeInterval(0)))
            return true
        } else {
            // Check if the maximum number of requests has been reached.
            if self.requests >= self.maxRequests {
                return false
            } else {
                // Increment the request count.
                self.requests += 1
                return true
            }
        }
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requests: Int
    private var lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requests = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        // Check if the time interval has passed since the last request.
        if TimeInterval(Date.now.timeIntervalSinceDate(self.lastRequestTime)) >= self.timeInterval {
            // Reset the request count and time interval.
            self.requests = 0
            self.lastRequestTime = TimeInterval(Date.now.timeIntervalSinceDate(TimeInterval(0)))
            return true
        } else {
            // Check if the maximum number of requests has been reached.
            if self.requests >= self.maxRequests {
                return false
            } else {
                // Increment the request count.
                self.requests += 1
                return true
            }
        }
    }
}

// Example usage:
let rateLimiter = RateLimiter(maxRequests: 10, timeInterval: 1.0)
for i in 0..<10 {
    print("Request ${i}: ${rateLimiter.allowRequest()}")
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requestsMade: Int
    private var lastRequestTime: TimeInterval
    
    // Initializes a new rate limiter with the specified maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestsMade = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = TimeInterval()
        let elapsedTime = currentTime - self.lastRequestTime
        
        // Check if the maximum number of requests has been reached.
        if self.requestsMade >= self.maxRequests {
            return false
        }
        
        // Check if the elapsed time is greater than the time interval.
        if elapsedTime >= self.timeInterval {
            self.requestsMade = 0
            self.lastRequestTime = currentTime
            return true
        }
        
        // Check if the elapsed time is less than the time interval.
        self.requestsMade += 1
        return false
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requestsMade: Int
    private var lastRequestTime: TimeInterval
    
    // Initializes a new rate limiter with the specified maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestsMade = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = TimeInterval()
        let elapsedTime = currentTime - self.lastRequestTime
        
        // Check if the maximum number of requests has been reached.
        if self.requestsMade >= self.maxRequests {
            return false
        }
        
        // Check if the elapsed time is greater than the time interval.
        if elapsedTime >= self.timeInterval {
            self.requestsMade = 0
            self.lastRequestTime = currentTime
            return true
        }
        
        // Check if the elapsed time is less than the time interval.
        self.requestsMade += 1
        return false
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requestCount: Int
    private var lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = 0
    }
    
    func allowRequest() -> Bool {
        if self.requestCount < self.maxRequests {
            self.requestCount += 1
            return true
        }
        else {
            let timeSinceLastRequest = TimeInterval(Date.now - self.lastRequestTime)
            if timeSinceLastRequest < self.timeInterval {
                return false
            }
            else {
                self.requestCount = 1
                self.lastRequestTime = Date.now
                return true
            }
        }
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var requestCount: Int
    private var lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = 0
    }
    
    func allowRequest() -> Bool {
        if self.requestCount < self.maxRequests {
            self.requestCount += 1
            return true
        }
        else {
            let timeSinceLastRequest = TimeInterval(Date.now - self.lastRequestTime)
            if timeSinceLastRequest < self.timeInterval {
                return false
            }
            else {
                self.requestCount = 1
                self.lastRequestTime = Date.now
                return true
            }
        }
    }
}

// Example usage:
let rateLimiter = RateLimiter(maxRequests: 5, timeInterval: 1.0)
for i in 0..<10 {
    print(rateLimiter.allowRequest())
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requestCount: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestCount = 0
        self._lastRequestTime = TimeInterval(0)
    }

    func allowRequest() -> Bool {
        // Check if the time interval has passed since the last request.
        let currentTime = TimeInterval()
        let timeSinceLastRequest = currentTime - self._lastRequestTime
        if timeSinceLastRequest < self._timeInterval {
            // If the time interval has not passed, return false.
            return false
        }

        // If the time interval has passed, reset the request count and update the last request time.
        self._requestCount = 0
        self._lastRequestTime = currentTime
        return true
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requestCount: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestCount = 0
        self._lastRequestTime = TimeInterval(0)
    }

    func allowRequest() -> Bool {
        // Check if the time interval has passed since the last request.
        let currentTime = TimeInterval()
        let timeSinceLastRequest = currentTime - self._lastRequestTime
        if timeSinceLastRequest < self._timeInterval {
            // If the time interval has not passed, return false.
            return false
        }

        // If the time interval has passed, reset the request count and update the last request time.
        self._requestCount = 0
        self._lastRequestTime = currentTime
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requestCount: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestCount = 0
        self._lastRequestTime = TimeInterval(0)
    }

    func allowRequest() -> Bool {
        // Check if the time interval has passed since the last request.
        let currentTime = TimeInterval()
        let timeSinceLastRequest = currentTime - self._lastRequestTime
        if timeSinceLastRequest < self._timeInterval {
            // If the time interval has not passed, return false.
            return false
        }

        // If the time interval has passed, reset the request count and update the last request time.
        self._requestCount = 0
        self._lastRequestTime = currentTime
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requestCount: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestCount = 0
        self._lastRequestTime = TimeInterval(0)
    }

    func allowRequest() -> Bool {
        // Check if the time interval has passed since the last request.
        let currentTime = TimeInterval()
        let timeSinceLastRequest = currentTime - self._lastRequestTime
        if timeSinceLastRequest < self._timeInterval {
            // If the time interval has not passed, return false.
            return false
        }

        // If the time interval has passed, reset the request count and update the last request time.
        self._requestCount = 0
        self._lastRequestTime = currentTime
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requestCount: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestCount = 0
        self._lastRequestTime = TimeInterval(0)
    }

    func allowRequest() -> Bool {
        // Check if the time interval has passed since the last request.
        let currentTime = TimeInterval()
        let timeSinceLastRequest = currentTime - self._lastRequestTime
        if timeSinceLastRequest < self._timeInterval {
            // If the time interval has not passed, return false.
            return false
        }

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _lastRequestTime: Double
    private var _requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        _maxRequests = maxRequests
        _timeInterval = timeInterval
        _lastRequestTime = 0.0
        _requestCount = 0
    }
    
    func allowRequest() -> Bool {
        let currentTime = Date.now()
        if currentTime - _lastRequestTime >= _timeInterval {
            _requestCount = 1
            _lastRequestTime = currentTime
            return true
        } else {
            _requestCount += 1
            if _requestCount >= _maxRequests {
                return false
            } else {
                _lastRequestTime = currentTime
                return true
            }
        }
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _lastRequestTime: Double
    private var _requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        _maxRequests = maxRequests
        _timeInterval = timeInterval
        _lastRequestTime = 0.0
        _requestCount = 0
    }
    
    func allowRequest() -> Bool {
        let currentTime = Date.now()
        if currentTime - _lastRequestTime >= _timeInterval {
            _requestCount = 1
            _lastRequestTime = currentTime
            return true
        } else {
            _requestCount += 1
            if _requestCount >= _maxRequests {
                return false
            } else {
                _lastRequestTime = currentTime
                return true
            }
        }
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _lastRequestTime: Double
    private var _requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        _maxRequests = maxRequests
        _timeInterval = timeInterval
        _lastRequestTime = 0.0
        _requestCount = 0
    }
    
    func allowRequest() -> Bool {
        let currentTime = Date.now()
        if currentTime - _lastRequestTime >= _timeInterval {
            _requestCount = 1
            _lastRequestTime = currentTime
            return true
        } else {
            _requestCount += 1
            if _requestCount >= _maxRequests {
                return false
            } else {
                _lastRequestTime = currentTime
                return true
            }
        }
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _lastRequestTime: Double
    private var _requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        _maxRequests = maxRequests
        _timeInterval = timeInterval
        _lastRequestTime = 0.0
        _requestCount = 0
    }
    
    func allowRequest() -> Bool {
        let currentTime = Date.now()
        if currentTime - _lastRequestTime >= _timeInterval {
            _requestCount = 1
            _lastRequestTime = currentTime
            return true
        } else {
            _requestCount += 1
            if _requestCount >= _maxRequests {
                return false
            } else {
                _lastRequestTime = currentTime
                return true
            }
        }
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _lastRequestTime: Double
    private var _requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        _maxRequests = maxRequests
        _timeInterval = timeInterval
        _lastRequestTime = 0.0
        _requestCount = 0
    }
    
    func allowRequest() -> Bool {
        let currentTime = Date.now()
        if currentTime - _lastRequestTime >= _timeInterval {
            _requestCount = 1
            _lastRequestTime = currentTime
            return true
        } else {
            _requestCount += 1
            if _requestCount >= _maxRequests {
                return false
            } else {
                _lastRequestTime = currentTime
                return true
            }
        }
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    var maxRequests: Int
    var timeInterval: TimeInterval
    var requestCount: Int
    var lastRequestTime: TimeInterval
    
    // Initialize the rate limiter with a maximum number of requests and a time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determine if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = TimeInterval()
        let timeSinceLastRequest = currentTime - self.lastRequestTime
        
        if self.requestCount < self.maxRequests && timeSinceLastRequest > self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = currentTime
            return true
        } else {
            return false
        }
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    var maxRequests: Int
    var timeInterval: TimeInterval
    var requestCount: Int
    var lastRequestTime: TimeInterval
    
    // Initialize the rate limiter with a maximum number of requests and a time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determine if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        let currentTime = TimeInterval()
        let timeSinceLastRequest = currentTime - self.lastRequestTime
        
        if self.requestCount < self.maxRequests && timeSinceLastRequest > self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = currentTime
            return true
        } else {
            return false
        }
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requestCount: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }

    func maxRequests() -> Int {
        return _maxRequests
    }

    func timeInterval() -> TimeInterval {
        return _timeInterval
    }

    func requestCount() -> Int {
        return _requestCount
    }

    func lastRequestTime() -> TimeInterval {
        return _lastRequestTime
    }

    func allowRequest() -> Bool {
        var now = TimeInterval(0)
        var elapsed = now - self.lastRequestTime
        if elapsed > self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = now
            return true
        } else if self.requestCount < self.maxRequests {
            self.requestCount += 1
            self.lastRequestTime = now
            return true
        } else {
            return false
        }
    }

    mutating func maxRequests(maxRequests: Int) {
        self._maxRequests = maxRequests
    }

    mutating func timeInterval(timeInterval: TimeInterval) {
        self._timeInterval = timeInterval
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _requestCount: Int
    private var _lastRequestTime: TimeInterval

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }

    func maxRequests() -> Int {
        return _maxRequests
    }

    func timeInterval() -> TimeInterval {
        return _timeInterval
    }

    func requestCount() -> Int {
        return _requestCount
    }

    func lastRequestTime() -> TimeInterval {
        return _lastRequestTime
    }

    func allowRequest() -> Bool {
        var now = TimeInterval(0)
        var elapsed = now - self.lastRequestTime
        if elapsed > self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = now
            return true
        } else if self.requestCount < self.maxRequests {
            self.requestCount += 1
            self.lastRequestTime = now
            return true
        } else {
            return false
        }
    }

    mutating func maxRequests(maxRequests: Int) {
        self._maxRequests = maxRequests
    }

    mutating func timeInterval(timeInterval: TimeInterval) {
        self._timeInterval = timeInterval
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _lastRequestTime: TimeInterval
    private var _requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        _maxRequests = maxRequests
        _timeInterval = timeInterval
        _lastRequestTime = TimeInterval(0)
        _requestCount = 0
    }
    
    func allowRequest() -> Bool {
        let currentTime = TimeInterval()
        let elapsedTime = currentTime - _lastRequestTime
        
        if elapsedTime < _timeInterval {
            _requestCount += 1
            return false
        }
        
        _requestCount = 1
        _lastRequestTime = currentTime
        return true
    }
}

```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private var _maxRequests: Int
    private var _timeInterval: TimeInterval
    private var _lastRequestTime: TimeInterval
    private var _requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        _maxRequests = maxRequests
        _timeInterval = timeInterval
        _lastRequestTime = TimeInterval(0)
        _requestCount = 0
    }
    
    func allowRequest() -> Bool {
        let currentTime = TimeInterval()
        let elapsedTime = currentTime - _lastRequestTime
        
        if elapsedTime < _timeInterval {
            _requestCount += 1
            return false
        }
        
        _requestCount = 1
        _lastRequestTime = currentTime
        return true
    }
}
```

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        self.currentValue += 1
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

class ThreadSafeCounterWithIncrement: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func increment(by: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

class ThreadSafeCounterWithIncrementByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

class ThreadSafeCounterWithIncrementByReferenceAndReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int, in: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

class ThreadSafeCounterWithIncrementByReferenceAndReferenceAndReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int, in: Int, in2: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

class ThreadSafeCounterWithIncrementByReferenceAndReferenceAndReferenceAndReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int, in: Int, in2: Int, in3: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        self.currentValue += 1
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

// Thread-safe counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithIncrement: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func increment(by: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

// Thread-safe counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithIncrementByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

// Thread-safe counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithIncrementByReferenceAndReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int, in: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

// Thread-safe counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithIncrementByReferenceAndReferenceAndReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int, in: Int, in2: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

// Thread-safe counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithIncrementByReferenceAndReferenceAndReferenceAndReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int, in: Int, in2: Int, in3: Int) {
        self.currentValue += by
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.currentValue
    }
}

// Thread-safe counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithIncrementByReferenceAndReferenceAndReferenceAndReferenceAndReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var currentValue: Int = 0
    // Initialize counter with given value.
    init(value: Int) {
        self.currentValue = value
    }
    // Increment counter by given value.
    func incrementBy(by: Int, in: Int, in2: Int, in3: Int, in4: Int) {
        self.currentValue += by
    }

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _value: Int
    // Thread-safe counter.
    var _counter: ThreadSafeCounterProtocol
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._value = value
        self._counter = ThreadSafeCounter(value: 0)
    }
    
    // Increment counter.
    func increment() {
        self._counter.increment()
        self._value += self._counter.currentValue()
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self._value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _value: Int
    // Thread-safe counter.
    var _counter: ThreadSafeCounterProtocol
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._value = value
        self._counter = ThreadSafeCounter(value: 0)
    }
    
    // Increment counter.
    func increment() {
        self._counter.increment()
        self._value += self._counter.currentValue()
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self._value
    }
}
```

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
    }
    
    // Increment counter by 1.
    func increment() {
        self._currentValue += 1
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        return self._currentValue
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Lock for read and write operations.
    var _lock: Lock
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
        self._lock = Lock()
    }
    
    // Increment counter by 1.
    func increment() {
        // Acquire lock for read and write operations.
        self._lock.lock()
        self._currentValue += 1
        // Release lock.
        self._lock.unlock()
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        // Acquire lock for read operations.
        self._lock.lock()
        var currentValue = self._currentValue
        // Release lock.
        self._lock.unlock()
        return currentValue
    }
}

class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Semaphore for read and write operations.
    var _semaphore: Semaphore
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
        self._semaphore = Semaphore(count: 1)
    }
    
    // Increment counter by 1.
    func increment() {
        // Acquire semaphore for read and write operations.
        self._semaphore.wait()
        self._currentValue += 1
        // Release semaphore.
        self._semaphore.signal()
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        // Acquire semaphore for read operations.
        self._semaphore.wait()
        var currentValue = self._currentValue
        // Release semaphore.
        self._semaphore.signal()
        return currentValue
    }
}

class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Barrier for read and write operations.
    var _barrier: Barrier
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
        self._barrier = Barrier(count: 2)
    }
    
    // Increment counter by 1.
    func increment() {
        // Acquire barrier for read and write operations.
        self._barrier.wait()
        self._currentValue += 1
        // Release barrier.
        self._barrier.signal()
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        // Acquire barrier for read operations.
        self._barrier.wait()
        var currentValue = self._currentValue
        // Release barrier.
        self._barrier.signal()
        return currentValue
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
    }
    
    // Increment counter by 1.
    func increment() {
        self._currentValue += 1
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        return self._currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Lock for read and write operations.
    var _lock: Lock
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
        self._lock = Lock()
    }
    
    // Increment counter by 1.
    func increment() {
        // Acquire lock for read and write operations.
        self._lock.lock()
        self._currentValue += 1
        // Release lock.
        self._lock.unlock()
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        // Acquire lock for read operations.
        self._lock.lock()
        var currentValue = self._currentValue
        // Release lock.
        self._lock.unlock()
        return currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Semaphore for read and write operations.
    var _semaphore: Semaphore
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
        self._semaphore = Semaphore(count: 1)
    }
    
    // Increment counter by 1.
    func increment() {
        // Acquire semaphore for read and write operations.
        self._semaphore.wait()
        self._currentValue += 1
        // Release semaphore.
        self._semaphore.signal()
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        // Acquire semaphore for read operations.
        self._semaphore.wait()
        var currentValue = self._currentValue
        // Release semaphore.
        self._semaphore.signal()
        return currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Barrier for read and write operations.
    var _barrier: Barrier
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
        self._barrier = Barrier(count: 2)
    }
    
    // Increment counter by 1.
    func increment() {
        // Acquire barrier for read and write operations.
        self._barrier.wait()
        self._currentValue += 1
        // Release barrier.
        self._barrier.signal()
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        // Acquire barrier for read operations.
        self._barrier.wait()
        var currentValue = self._currentValue
        // Release barrier.
        self._barrier.signal()
        return currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Condition for read and write operations.
    var _condition: Condition
    
    // Initialize counter with initial value.
    init(value: Int) {
        self._currentValue = value
        self._condition = Condition()
    }
    
    // Increment counter by 1.
    func increment() {
        // Acquire condition for read and write operations.
        self._condition.wait(in: self)
        self._currentValue += 1
        // Release condition.
        self._condition.signal()
    }
    
    // Get current value of counter.
    func currentValue() -> Int {
        //

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by one.
    func increment() {
        self.value += 1
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterByValue: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterByReferenceByValue: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterByReferenceByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterByReferenceByReferenceByValue: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterByReferenceByReferenceByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by one.
    func increment() {
        self.value += 1
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByValue: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByReferenceByValue: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByReferenceByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByReferenceByReferenceByValue: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A counter with possibility to increment counter by given value and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByReferenceByReferenceByReference: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    
    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }
    
    // Increment counter by given value.
    func incrementBy(byValue: Int) {
        self.value += byValue
    }
    
    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A counter with possibility to increment counter by given value and access current value

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    
    init(value: Int) {
        _currentValue = value
    }
    
    func increment() {
        _currentValue += 1
    }
    
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _lock: Lock
    
    init(value: Int) {
        _currentValue = value
        _lock = Lock()
    }
    
    func increment() {
        _lock.lock()
        _currentValue += 1
        _lock.unlock()
    }
    
    func currentValue() -> Int {
        _lock.lock()
        var result = _currentValue
        _lock.unlock()
        return result
    }
}

class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _semaphore: Semaphore
    
    init(value: Int) {
        _currentValue = value
        _semaphore = Semaphore(count: 1)
    }
    
    func increment() {
        _semaphore.wait()
        _currentValue += 1
        _semaphore.signal()
    }
    
    func currentValue() -> Int {
        _semaphore.wait()
        var result = _currentValue
        _semaphore.signal()
        return result
    }
}

class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _barrier: Barrier
    
    init(value: Int) {
        _currentValue = value
        _barrier = Barrier(count: 1)
    }
    
    func increment() {
        _barrier.wait()
        _currentValue += 1
        _barrier.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        var result = _currentValue
        _barrier.signal()
        return result
    }
}

class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _condition: Condition
    
    init(value: Int) {
        _currentValue = value
        _condition = Condition()
    }
    
    func increment() {
        _condition.wait(in: _condition.lock())
        _currentValue += 1
        _condition.signal()
    }
    
    func currentValue() -> Int {
        _condition.wait(in: _condition.lock())
        var result = _currentValue
        _condition.signal()
        return result
    }
}

class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _barrier: Barrier
    private var _condition: Condition
    
    init(value: Int) {
        _currentValue = value
        _barrier = Barrier(count: 1)
        _condition = Condition()
    }
    
    func increment() {
        _barrier.wait()
        _condition.wait(in: _condition.lock())
        _currentValue += 1
        _condition.signal()
        _barrier.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        _condition.wait(in: _condition.lock())
        var result = _currentValue
        _condition.signal()
        _barrier.signal()
        return result
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    
    init(value: Int) {
        _currentValue = value
    }
    
    func increment() {
        _currentValue += 1
    }
    
    func currentValue() -> Int {
        return _currentValue
    }
}

// Number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _lock: Lock
    
    init(value: Int) {
        _currentValue = value
        _lock = Lock()
    }
    
    func increment() {
        _lock.lock()
        _currentValue += 1
        _lock.unlock()
    }
    
    func currentValue() -> Int {
        _lock.lock()
        var result = _currentValue
        _lock.unlock()
        return result
    }
}

// Number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _semaphore: Semaphore
    
    init(value: Int) {
        _currentValue = value
        _semaphore = Semaphore(count: 1)
    }
    
    func increment() {
        _semaphore.wait()
        _currentValue += 1
        _semaphore.signal()
    }
    
    func currentValue() -> Int {
        _semaphore.wait()
        var result = _currentValue
        _semaphore.signal()
        return result
    }
}

// Number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _barrier: Barrier
    
    init(value: Int) {
        _currentValue = value
        _barrier = Barrier(count: 1)
    }
    
    func increment() {
        _barrier.wait()
        _currentValue += 1
        _barrier.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        var result = _currentValue
        _barrier.signal()
        return result
    }
}

// Number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _condition: Condition
    
    init(value: Int) {
        _currentValue = value
        _condition = Condition()
    }
    
    func increment() {
        _condition.wait(in: _condition.lock())
        _currentValue += 1
        _condition.signal()
    }
    
    func currentValue() -> Int {
        _condition.wait(in: _condition.lock())
        var result = _currentValue
        _condition.signal()
        return result
    }
}

// Number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _barrier: Barrier
    private var _condition: Condition
    
    init(value: Int) {
        _currentValue = value
        _barrier = Barrier(count: 1)
        _condition = Condition()
    }
    
    func increment() {
        _barrier.wait()
        _condition.wait(in: _condition.lock())
        _currentValue += 1
        _condition.signal()
        _barrier.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        _condition.wait(in: _condition.lock())
        var result = _currentValue
        _condition.signal()
        _barrier.signal()
        return result
    }
}

// Number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphoreAndCondition: ThreadSafeCounterProtocol {
    private var _currentValue: Int
    private var _semaphore: Semaphore
    private var _condition: Condition
    
    init(value: Int) {
        _currentValue = value
        _semaphore = Semaphore(count: 1)
        _condition = Condition()

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        self.value += 1
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        lock {
            // Increment the counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        lock {
            // Increment the counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithMutex: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithSemaphoreAndMutex: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithSemaphoreAndMutexAndCondition: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        // Unlock the counter.
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithSemaphoreAndMutexAndConditionAndBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        // Unlock the counter.
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        self.value += 1
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be incremented by multiple threads.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        lock {
            // Increment the counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be incremented by multiple threads.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        lock {
            // Increment the counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be incremented by multiple threads.
class ThreadSafeCounterWithMutex: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be incremented by multiple threads.
class ThreadSafeCounterWithSemaphoreAndMutex: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be incremented by multiple threads.
class ThreadSafeCounterWithSemaphoreAndMutexAndCondition: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        // Unlock the counter.
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be incremented by multiple threads.
class ThreadSafeCounterWithSemaphoreAndMutexAndConditionAndBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Lock the counter.
        mutex.lock()
        // Increment the counter.
        self.value += 1
        // Unlock the counter.
        mutex.unlock()
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be incremented by multiple threads.
class ThreadSafeCounterWithSemaphoreAndMutexAnd

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter by 1.
    func increment() {
        self.value += 1
    }

    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter by 1.
    func increment() {
        self.value += 1
    }

    // Return current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}
```

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    // Create new counter with initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment counter by one.
    func increment() {
        self.value += 1
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int
    // Create new counter with initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment counter by one.
    func increment() {
        self.value += 1
    }
    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}
```

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        self.value += 1
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithLockAndCondition: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithLockAndConditionAndBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithLockAndConditionAndBarrierAndSemaphore: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounterWithLockAndConditionAndBarrierAndSemaphoreAndBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        self.value += 1
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLockAndCondition: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLockAndConditionAndBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLockAndConditionAndBarrierAndSemaphore: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLockAndConditionAndBarrierAndSemaphoreAndBarrier: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int {
        return self.value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLockAndConditionAndBarrierAndSemaphoreAndBarrierAndSemaphore: ThreadSafeCounterProtocol {
    // Current value of counter.
    var value: Int

    // Initialize counter with given value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        // Acquire lock.
        lock {
            // Increment counter.
            self.value += 1
        }
    }

    // Get current value of counter.
    func currentValue() -> Int

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

```swift
protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter2: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter3: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter4: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter5: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter6: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter7: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounter8: ThreadSafeCounterProtocol {
    // Current value of counter.
    var _currentValue: Int
    // Initialize counter with initial value.
    init(value: Int) {
        _currentValue = value
    }
    // Increment counter by 1.
    func increment() {
        _currentValue += 1
    }
    // Return current value of counter.
    func currentValue() -> Int {
        return _currentValue
    }
}

// Basic number counter

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    associatedtype Output
    
    // Initial value to start the pipeline with.
    var value: Output
    
    // Initializer to create a pipeline with an initial value.
    init(value: Output) {
        self.value = value
    }
    
    // Transformation function to apply to the output of the previous transformation.
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(transform(value))
    }
    
    // Execute the pipeline, producing the final output.
    func execute() -> Output {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    associatedtype Output
    
    // Initial value to start the pipeline with.
    var value: Output
    
    // Initializer to create a pipeline with an initial value.
    init(value: Output) {
        self.value = value
    }
    
    // Transformation function to apply to the output of the previous transformation.
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(transform(value))
    }
    
    // Execute the pipeline, producing the final output.
    func execute() -> Output {
        return value
    }
}

// Example usage of the Pipeline class
let pipeline = Pipeline<Int>(10)
    .pipe(x -> x * 2)
    .pipe(x -> x + 5)
    .pipe(x -> x.toString())
    .execute()

print(pipeline) // Output: "17"

```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// A class that implements the pipeline protocol and can be used to create a pipeline of transformations.
class PipelineBuilder<Output>: PipelineProtocol {
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    var initialValue: Output
    init(initialValue: Output) {
        self.initialValue = initialValue
    }
    
    // Pipe a transformation function to the pipeline.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is applied to the current output value, producing a new output value.
    // The new output value is then used as the input value for the next transformation.
    // The transformation function is passed as a closure, allowing it to access the current output value.
    // The closure is called with the current output value as the first argument, and returns the new output value as the result.
    // The closure is then

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let nextValue = transform(self.value)
        return Pipeline<U>(nextValue)
    }
    
    func execute() -> Output {
        return self.value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let nextValue = transform(self.value)
        return Pipeline<U>(nextValue)
    }
    
    func execute() -> Output {
        return self.value
    }
}

// Example usage:
let pipeline = Pipeline<Int>(value: 1)
    .pipe(transform1)
    .pipe(transform2)
    .pipe(transform3)
    .execute()

print(pipeline) // Output: 3

```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output> where Output: PipelineProtocol {
    associatedtype U
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let result = transform(value)
        return Pipeline<U>(result)
    }
    
    func execute() -> Output {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    associatedtype U
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let result = transform(value)
        return Pipeline<U>(result)
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage
let pipeline = Pipeline<Int>(value: 1)
    .pipe(transform1)
    .pipe(transform2)
    .pipe(transform3)
    .execute()
print(pipeline)
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let next = transform(self.value)
        return Pipeline<U>(next)
    }
    
    func execute() -> Output {
        return self.value.execute()
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let next = transform(self.value)
        return Pipeline<U>(next)
    }
    
    func execute() -> Output {
        return self.value.execute()
    }
}

// Example usage:
let pipeline = Pipeline<Int>(1)
    .pipe(x -> x + 2)
    .pipe(x -> x * 3)
    .pipe(x -> x - 5)
    .execute() // Output: 11

print(pipeline) // Output: 11
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output> where Output: PipelineProtocol {
    associatedtype U
    var value: Output
    var transforms: [@escaping (Output) -> U]
    
    init(_ value: Output) {
        self.value = value
        self.transforms = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        self.transforms.append(transform)
        return self
    }
    
    func execute() -> Output {
        var output = self.value
        for transform in self.transforms {
            output = transform(output)
        }
        return output
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    associatedtype U
    var value: Output
    var transforms: [@escaping (Output) -> U]
    
    init(_ value: Output) {
        self.value = value
        self.transforms = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        self.transforms.append(transform)
        return self
    }
    
    func execute() -> Output {
        var output = self.value
        for transform in self.transforms {
            output = transform(output)
        }
        return output
    }
}
```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    var _transformations: [@escaping (Output) -> Output]
    
    init(value: Output) {
        self.value = value
        self._transformations = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newPipeline = Pipeline<U>(value: transform(self.value))
        self._transformations.append(transform)
        return newPipeline
    }
    
    func execute() -> Output {
        var result = self.value
        for (transform in self._transformations) {
            result = transform(result)
        }
        return result
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    var _transformations: [@escaping (Output) -> Output]
    
    init(value: Output) {
        self.value = value
        self._transformations = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newPipeline = Pipeline<U>(value: transform(self.value))
        self._transformations.append(transform)
        return newPipeline
    }
    
    func execute() -> Output {
        var result = self.value
        for (transform in self._transformations) {
            result = transform(result)
        }
        return result
    }
}

// Example usage:
let pipeline = Pipeline(value: 1)
    .pipe(transform1)
    .pipe(transform2)
    .execute()
print(pipeline) // Output: 42

```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    var transforms: [@escaping (Output) -> Output]
    
    init(value: Output) {
        self.value = value
        self.transforms = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        self.transforms.append(transform)
        return self
    }
    
    func execute() -> Output {
        var result = self.value
        for transform in self.transforms {
            result = transform(result)
        }
        return result
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    var value: Output
    var transforms: [@escaping (Output) -> Output]
    
    init(value: Output) {
        self.value = value
        self.transforms = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        self.transforms.append(transform)
        return self
    }
    
    func execute() -> Output {
        var result = self.value
        for transform in self.transforms {
            result = transform(result)
        }
        return result
    }
}

// Example usage:
let numbers = [1, 2, 3, 4, 5]
let squaredNumbers = Pipeline(numbers)
    .pipe(x -> x * x)
    .pipe(x -> x * x)
    .execute()
print(squaredNumbers) // Output: [1, 4, 9, 16, 25]

```

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output> where Output: PipelineProtocol {
    associatedtype Input
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output> where Output: PipelineProtocol {
    associatedtype Input
    associatedtype Output
    
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline<Int>(value: 1)
    .pipe { it + 1 }
    .pipe { it * 2 }
    .pipe { it - 3 }
    .execute() // Output: 5

// Example usage:
let pipeline = Pipeline<Int>(value: 1)
    .pipe { it + 1 }
    .pipe { it * 2 }
    .pipe { it - 3 }
    .execute() // Output: 5
```

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The value of the property.
    var value: Value
    // The observers that are notified of value changes.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The UUID of the current observer.
    private var currentObserver: UUID? = nil
    // The observer that is currently subscribed.
    private var currentObserverValue: @escaping (Value) -> Void? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil
    // The UUID of the current observer.
    private var currentObserverUUID: UUID? = nil

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observersCount: Int = 0
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private var observersLock: Lock = Lock()
    // The observers of the property.
    private var observersCountLock: Lock = Lock()
    // The observers of the property.
    private

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observers that are currently subscribed to the property.
    private var

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers that are subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observer count of the property.
    private var _observerCount: Int = 0
    // The lock to protect the observers.
    private var _observersLock: Lock = Lock()
    // The lock to protect the observer count.
    private var _observerCountLock: Lock = Lock()

    // Initializes the property with the given initial value.
    init(value: Value) {
        self.value = value
    }

    // Subscribes to the property with the given observer.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        guard(_observerCount > 0, "Cannot subscribe to an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot subscribe to a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot subscribe to a locked property.")
        let observerUUID = UUID()
        _observers[observerUUID] = observer
        _observerCount += 1
        _observerCountLock.unlock()
        _observersLock.unlock()
        return observerUUID
    }

    // Unsubscribes the observer with the given UUID.
    func unsubscribe(_ observer: UUID) {
        guard(_observerCount > 0, "Cannot unsubscribe from an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot unsubscribe from a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot unsubscribe from a locked property.")
        _observers.remove(_observer)
        _observerCount -= 1
        _observerCountLock.unlock()
        _observersLock.unlock()
    }
}

class ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> {
    // The current value of the property.
    var value: Value
    // The observers that are subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observer count of the property.
    private var _observerCount: Int = 0
    // The lock to protect the observers.
    private var _observersLock: Lock = Lock()
    // The lock to protect the observer count.
    private var _observerCountLock: Lock = Lock()

    // Initializes the property with the given initial value.
    init(value: Value) {
        self.value = value
    }

    // Subscribes to the property with the given observer.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        guard(_observerCount > 0, "Cannot subscribe to an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot subscribe to a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot subscribe to a locked property.")
        let observerUUID = UUID()
        _observers[observerUUID] = observer
        _observerCount += 1
        _observerCountLock.unlock()
        _observersLock.unlock()
        return observerUUID
    }

    // Unsubscribes the observer with the given UUID.
    func unsubscribe(_ observer: UUID) {
        guard(_observerCount > 0, "Cannot unsubscribe from an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot unsubscribe from a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot unsubscribe from a locked property.")
        _observers.remove(_observer)
        _observerCount -= 1
        _observerCountLock.unlock()
        _observersLock.unlock()
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers that are subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observer count of the property.
    private var _observerCount: Int = 0
    // The lock to protect the observers.
    private var _observersLock: Lock = Lock()
    // The lock to protect the observer count.
    private var _observerCountLock: Lock = Lock()

    // Initializes the property with the given initial value.
    init(value: Value) {
        self.value = value
    }

    // Subscribes to the property with the given observer.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        guard(_observerCount > 0, "Cannot subscribe to an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot subscribe to a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot subscribe to a locked property.")
        let observerUUID = UUID()
        _observers[observerUUID] = observer
        _observerCount += 1
        _observerCountLock.unlock()
        _observersLock.unlock()
        return observerUUID
    }

    // Unsubscribes the observer with the given UUID.
    func unsubscribe(_ observer: UUID) {
        guard(_observerCount > 0, "Cannot unsubscribe from an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot unsubscribe from a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot unsubscribe from a locked property.")
        _observers.remove(_observer)
        _observerCount -= 1
        _observerCountLock.unlock()
        _observersLock.unlock()
    }
}

// A property that can be observed for changes.
class ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservableProperty<Value> {
    // The current value of the property.
    var value: Value
    // The observers that are subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observer count of the property.
    private var _observerCount: Int = 0
    // The lock to protect the observers.
    private var _observersLock: Lock = Lock()
    // The lock to protect the observer count.
    private var _observerCountLock: Lock = Lock()

    // Initializes the property with the given initial value.
    init(value: Value) {
        self.value = value
    }

    // Subscribes to the property with the given observer.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        guard(_observerCount > 0, "Cannot subscribe to an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot subscribe to a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot subscribe to a locked property.")
        let observerUUID = UUID()
        _observers[observerUUID] = observer
        _observerCount += 1
        _observerCountLock.unlock()
        _observersLock.unlock()
        return observerUUID
    }

    // Unsubscribes the observer with the given UUID.
    func unsubscribe(_ observer: UUID) {
        guard(_observerCount > 0, "Cannot unsubscribe from an unsubscribed property.")
        guard(_observersLock.tryLock(), "Cannot unsubscribe from a locked property.")
        guard(_observerCountLock.tryLock(), "Cannot unsubscribe from a locked property.")
        _observers.remove(_observer)
        _observerCount -= 1
        _observerCountLock.unlock()
        _observersLock.unlock()
    }
}

// A property that can be observed for changes.
class ObservableProperty<Value> {
    // The current value of the property.
    var value: Value
    // The observers that are subscribed to the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    // The observer count of the property.
    private var _observerCount: Int = 0
    // The lock to protect the observers.
    private var _observersLock: Lock = Lock()
    // The lock to protect the

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    
    // Initialize the property with the given initial value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        self._observers[observerID] = observer
        return observerID
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify all observers of the property's value change.
    func notifyObservers() {
        for observerID, observer in self._observers {
            observer(self.value)
        }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = [:]
    
    // Initialize the property with the given initial value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let observerID = UUID()
        self._observers[observerID] = observer
        return observerID
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify all observers of the property's value change.
    func notifyObservers() {
        for observerID, observer in self._observers {
            observer(self.value)
        }
    }
}
```

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The observers of the property.
    private var observers: [UUID: @escaping (Value)

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    var observers: [(@escaping (Value) -> Void)]
    // The UUID of the current observer.
    var currentObserver: UUID
    // The UUID of the last observer that was removed.
    var lastObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedAddedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedAddedRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedRemovedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedAddedRemovedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedAddedRemovedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedRemovedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedRemovedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was removed.
    var lastRemovedRemovedAddedAddedAddedObserver: UUID
    // The UUID of the last observer that was added.
    var lastAddedRemovedAddedAddedRemovedObserver: UUID
    // The UUID of the last observer that was removed.

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut2: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut3: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut4: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut5: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut6: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut7: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut8: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut9: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut10: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut11: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut12: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut13: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut14: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut15: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut16: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut17: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut18: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut19: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut20: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut21: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut22: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut23: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut24: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut25: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut26: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut27: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut28: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut29: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut30: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersMut31: [UUID: @escaping

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = {}
    // The UUID of the last observer that was added.
    private var _lastObserverUUID: UUID? = nil
    // The UUID of the last observer that was removed.
    private var _lastObserverUUIDRemoved: UUID? = nil
    // The UUID of the last observer that was removed.
    private var _lastObserverUUIDAdded: UUID? = nil
    // The UUID of the last observer that was removed.
    private var _lastObserverUUIDAdded: UUID? = nil

    // Initialize the property with the given value.
    init(value: Value) {
        self.value = value
    }

    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        self._observers[uuid] = observer
        self._lastObserverUUIDAdded = uuid
        return uuid
    }

    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers[observer] = nil
        self._lastObserverUUIDRemoved = observer
    }
}

class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The current value of the property.
    var value: Value
    // The observers of the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = {}
    // The UUID of the last observer that was added.
    private var _lastObserverUUID: UUID? = nil
    // The UUID of the last observer that was removed.
    private var _lastObserverUUIDRemoved: UUID? = nil
    // The UUID of the last observer that was removed.
    private var _lastObserverUUIDAdded: UUID? = nil
    // The UUID of the last observer that was removed.
    private var _lastObserverUUIDAdded: UUID? = nil

    // Initialize the property with the given value.
    init(value: Value) {
        self.value = value
    }

    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        self._observers[uuid] = observer
        self._lastObserverUUIDAdded = uuid
        return uuid
    }

    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers[observer] = nil
        self._lastObserverUUIDRemoved = observer
    }
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// A property that can be observed for changes.
class ObservablePropertyProtocol<Value> {
    associated

protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    
    // Initializes the property with the given value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property's value changes.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for observer in observers {
            observer(self.value)
        }
    }
}

class ObservableProperty<Value> {
    // The value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    
    // Initializes the property with the given value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property's value changes.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for observer in observers {
            observer(self.value)
        }
    }
}

```swift
protocol ObservablePropertyProtocol {
    associatedtype Value
    init(value: Value)
    var value: Value { get set }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID
    func unsubscribe(_ observer: UUID)
}

// Generic observable property that notifies observers of value changes.
class ObservableProperty<Value> implements ObservablePropertyProtocol {
    // The value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    
    // Initializes the property with the given value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property's value changes.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for observer in observers {
            observer(self.value)
        }
    }
}

// A property that can be observed for changes.
class ObservableProperty<Value> {
    // The value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    
    // Initializes the property with the given value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property's value changes.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for observer in observers {
            observer(self.value)
        }
    }
}

// A property that can be observed for changes.
class ObservableProperty<Value> {
    // The value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    
    // Initializes the property with the given value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property's value changes.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for observer in observers {
            observer(self.value)
        }
    }
}

// A property that can be observed for changes.
class ObservableProperty<Value> {
    // The value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    
    // Initializes the property with the given value.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property's value changes.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for observer in observers {
            observer(self.value)
        }
    }
}

// A property that can be observed for changes.
class ObservableProperty<Value> {
    // The value of the property.
    var value: Value
    // The observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    
    // Initializes the property with the given value.
    init(value: Value) {
        self.value =

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

struct ClampedNumber<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension ClampedNumber {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

struct ClampedString<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension ClampedString {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

struct ClampedBool<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension ClampedBool {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

struct ClampedDate<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension ClampedDate {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

struct ClampedTime<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension ClampedTime {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

struct ClampedDateTime<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Extension methods for the Clamped protocol.
extension ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

// Clamped wrapper for a number.
struct ClampedNumber<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Extension methods for the ClampedNumber protocol.
extension ClampedNumber {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

// Clamped wrapper for a string.
struct ClampedString<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Extension methods for the ClampedString protocol.
extension ClampedString {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

// Clamped wrapper for a boolean.
struct ClampedBool<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Extension methods for the ClampedBool protocol.
extension ClampedBool {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

// Clamped wrapper for a date.
struct ClampedDate<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Extension methods for the ClampedDate protocol.
extension ClampedDate {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

// Clamped wrapper for a time.
struct ClampedTime<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Extension methods for the ClampedTime protocol.
extension ClampedTime {
    // Clamps the wrapped value within the specified range.
    func clamp(_ wrappedValue: Value) -> Value {
        return wrappedValue.clamp(range.start, range.end)
    }
}

// Clamped wrapper for a date-time.
struct ClampedDateTime<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Extension methods for the ClampedDateTime protocol.
extension ClampedDateTime {
    // Clamps the wrapped value within the specified range.

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrappedValue: Wrapped.Value
    var range: ClosedRange<Wrapped.Value>
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

extension Clamped<Wrapped: ClampedProtocol> ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrappedValue: Wrapped.Value
    var range: ClosedRange<Wrapped.Value>
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}
```

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var value: Wrapped.Value {
        return self.wrapped.value
    }
    @required
    var minValue: Wrapped.Value {
        return self.range.start
    }
    @required
    var maxValue: Wrapped.Value {
        return self.range.end
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    mutating func setValue(_ value: Wrapped.Value) {
        self.wrapped.value = value
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    mutating func setRange(_ range: ClosedRange<Wrapped.Value>) {
        self.range = range
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var wrapped: Wrapped {
        return self.wrapped
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var range: ClosedRange<Wrapped.Value> {
        return self.range
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var minValue: Wrapped.Value {
        return self.range.start
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var maxValue: Wrapped.Value {
        return self.range.end
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var value: Wrapped.Value {
        return self.wrapped.value
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Protocol conformance for Clamped<Wrapped>.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var value: Wrapped.Value {
        return self.wrapped.value
    }
    @required
    var minValue: Wrapped.Value {
        return self.range.start
    }
    @required
    var maxValue: Wrapped.Value {
        return self.range.end
    }
}

// Clamped<Wrapped> extension to set the value of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    mutating func setValue(_ value: Wrapped.Value) {
        self.wrapped.value = value
    }
}

// Clamped<Wrapped> extension to set the range of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    mutating func setRange(_ range: ClosedRange<Wrapped.Value>) {
        self.range = range
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var wrapped: Wrapped {
        return self.wrapped
    }
}

// Clamped<Wrapped> extension to get the range of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var range: ClosedRange<Wrapped.Value> {
        return self.range
    }
}

// Clamped<Wrapped> extension to get the minimum value of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var minValue: Wrapped.Value {
        return self.range.start
    }
}

// Clamped<Wrapped> extension to get the maximum value of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var maxValue: Wrapped.Value {
        return self.range.end
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var value: Wrapped.Value {
        return self.wrapped.value
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    mutating func setValue(_ value: Wrapped.Value) {
        self.wrapped.value = value
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    mutating func setRange(_ range: ClosedRange<Wrapped.Value>) {
        self.range = range
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var wrapped: Wrapped {
        return self.wrapped
    }
}

// Clamped<Wrapped> extension to get the range of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var range: ClosedRange<Wrapped.Value> {
        return self.range
    }
}

// Clamped<Wrapped> extension to get the minimum value of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var minValue: Wrapped.Value {
        return self.range.start
    }
}

// Clamped<Wrapped> extension to get the maximum value of the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var maxValue: Wrapped.Value {
        return self.range.end
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    var value: Wrapped.Value {
        return self.wrapped.value
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    mutating func setValue(_ value: Wrapped.Value) {
        self.wrapped.value = value
    }
}

// Clamped<Wrapped> extension to get the wrapped object.
extension Clamped<

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension ClampedProtocol {
    // Returns the wrapped value clamped within the specified range.
    func clampedValue() -> Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

extension Clamped<Wrapped: ClampedProtocol> : ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

// Protocol extension for Clamped.
extension ClampedProtocol {
    // Returns the wrapped value clamped within the specified range.
    func clampedValue() -> Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation.
extension Clamped<Wrapped: ClampedProtocol> : ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue
    }
}

// Clamped protocol implementation for a generic type.
extension Clamped<Wrapped: ClampedProtocol> {
    // Clamps the wrapped value within the specified range.
    func clampedValue() -> Wrapped.Value {
        let clampedValue = wrapped.clampedValue()
        return clampedValue

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension Clamped {
    @unavailable("Use the property wrapper instead")
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {}
}

protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrapped: Wrapped
    var range: ClosedRange<Wrapped.Value>
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Wrapped(wrappedValue, range)
        self.range = range
    }
}

extension Clamped {
    @unavailable("Use the property wrapper instead")
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {}
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Protocol implementation that clamps value within a specified range.
protocol ClampedProtocol where Value: Comparable {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrappedValue: Wrapped.Value
    var range: ClosedRange<Wrapped.Value>
}

extension ClampedProtocol {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

@property Clamped<Wrapped: ClampedProtocol>

// Clamped property conformance.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    var wrappedValue: Wrapped.Value
    var range: ClosedRange<Wrapped.Value>
}

// Clamped protocol conformance.
extension ClampedProtocol {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped property.
@property Clamped<Wrapped: ClampedProtocol>

// Clamped property conformance.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

// Clamped property setter.
extension ClampedProtocol {
    var value = value where Value: Comparable {
        guard self.range.contains(value) else {
            throw ClampedValueOutOfRange(value, self.range)
        }
        self.wrappedValue = value
    }
}

// Clamped property getter.
extension ClampedProtocol {
    var value: Value {
        return self.wrappedValue
    }
}

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable> {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    // Initialize the property with a value and a range.
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

extension Clamped<Value: Comparable> {
    // Clamp the wrapped value within the specified range.
    func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

extension ClampedProtocol {
    // Initialize a Clamped struct with a value and a range.
    func init(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped(wrappedValue: wrappedValue, range: range)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    // Initialize the property with a value and a range.
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Extension methods for the Clamped struct.
extension Clamped<Value: Comparable> {
    // Clamp the wrapped value within the specified range.
    func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Protocol implementation for ClampedProtocol.
extension ClampedProtocol {
    // Initialize a Clamped struct with a value and a range.
    func init(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped(wrappedValue: wrappedValue, range: range)
    }
}

// Extension methods for the Clamped struct.
extension Clamped<Value: Comparable> {
    // Clamp the wrapped value within the specified range.
    func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Protocol implementation for ClampedProtocol.
extension ClampedProtocol {
    // Initialize a Clamped struct with a value and a range.
    func init(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped(wrappedValue: wrappedValue, range: range)
    }
}
```

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable> where Value: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Returns the wrapped value clamped to the specified range.
    @objc func clampedValue(_: Self) -> Value {
        return self.wrappedValue.clampedTo(self.range)
    }
}

extension ClampedProtocol {
    // Clamps the wrapped value to the specified range.
    func clampedTo(_ range: ClosedRange<Value>) -> Value {
        return Value(self.wrappedValue.clampedTo(range))
    }
}

struct ClampedInt: ClampedProtocol {
    associatedtype Value: Int
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedUInt: ClampedProtocol {
    associatedtype Value: UInt
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedFloat: ClampedProtocol {
    associatedtype Value: Float
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedDouble: ClampedProtocol {
    associatedtype Value: Double
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> where Value: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Returns the wrapped value clamped to the specified range.
    @objc func clampedValue(_: Self) -> Value {
        return self.wrappedValue.clampedTo(self.range)
    }
}

// Extension to ClampedProtocol protocol.
extension ClampedProtocol {
    // Clamps the wrapped value to the specified range.
    func clampedTo(_ range: ClosedRange<Value>) -> Value {
        return Value(self.wrappedValue.clampedTo(range))
    }
}

// ClampedInt is a ClampedProtocol implementation for Int values.
struct ClampedInt: ClampedProtocol {
    associatedtype Value: Int
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedUInt is a ClampedProtocol implementation for UInt values.
struct ClampedUInt: ClampedProtocol {
    associatedtype Value: UInt
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedFloat is a ClampedProtocol implementation for Float values.
struct ClampedFloat: ClampedProtocol {
    associatedtype Value: Float
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedDouble is a ClampedProtocol implementation for Double values.
struct ClampedDouble: ClampedProtocol {
    associatedtype Value: Double
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedInt is a ClampedProtocol implementation for Int values.
struct ClampedInt: ClampedProtocol {
    associatedtype Value: Int
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedUInt is a ClampedProtocol implementation for UInt values.
struct ClampedUInt: ClampedProtocol {
    associatedtype Value: UInt
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedFloat is a ClampedProtocol implementation for Float values.
struct ClampedFloat: ClampedProtocol {
    associatedtype Value: Float
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedDouble is a ClampedProtocol implementation for Double values.
struct ClampedDouble: ClampedProtocol {
    associatedtype Value: Double
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedInt is a ClampedProtocol implementation for Int values.
struct ClampedInt: ClampedProtocol {
    associatedtype Value: Int
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedUInt is a ClampedProtocol implementation for UInt values.
struct ClampedUInt: ClampedProtocol {
    associatedtype Value: UInt
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedFloat is a ClampedProtocol implementation for Float values.
struct ClampedFloat: ClampedProtocol {
    associatedtype Value: Float
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedDouble is a ClampedProtocol implementation for Double values.
struct ClampedDouble: ClampedProtocol {
    associatedtype Value: Double
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedInt

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable> {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

extension Clamped<Value: Comparable> {
    // Clamps the wrapped value to the specified range.
    func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

extension Clamped<Value: Comparable> {
    // Clamps the wrapped value to the specified range.
    func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.range)
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    override func clamp() -> Value {
        return self.wrappedValue.clamp(to: self.

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable> {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Returns the wrapped value clamped to the specified range.
    func clampedValue() -> Value {
        return self.wrappedValue.clamp(self.range)
    }
}

extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable> {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Returns the wrapped value clamped to the specified range.
    func clampedValue() -> Value {
        return self.wrappedValue.clamp(self.range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension ClampedProtocol {
    func Clamped<Value: Comparable>(wrappedValue: Value, range: ClosedRange<Value>) -> Clamped<Value> {
        return Clamped<Value>(wrappedValue: wrappedValue, range: range)
    }
}

// Extension method to wrap a value in a Clamped<Value> object.
extension Clamped

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

extension Logged<T: LoggedProtocol> {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Accessor for the wrapped property.
    var value: T.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
    
    // Mutator for the wrapped property.
    var value: T.Value {
        self.logger(Event.set, self.wrappedValue)
        self.wrappedValue = value
    }
}

struct MyStruct: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension Logged<T: LoggedProtocol> {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Accessor for the wrapped property.
    var value: T.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
    
    // Mutator for the wrapped property.
    var value: T.Value {
        self.logger(Event.set, self.wrappedValue)
        self.wrappedValue = value
    }
}

// Example usage
struct MyStruct: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

let logger = { (event, value) in
    print("Event: \(event), Value: \(value)")
}

let myStruct = Logged(MyStruct(wrappedValue: 42, logger: logger))
print("Value: \(myStruct.value)") // Event: get, Value: 42
myStruct.value = 100 // Event: set, Value: 100
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: T.logger
    init(wrappedValue: T.Value, logger: T.logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

class MyClass: LoggedProtocol {
    override var wrappedValue: Int = 0
    override var logger: @escaping (Event, Int) -> Void {
        print("Event: $0, Value: $1")
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: T.logger
    init(wrappedValue: T.Value, logger: T.logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Example usage
class MyClass: LoggedProtocol {
    override var wrappedValue: Int = 0
    override var logger: @escaping (Event, Int) -> Void {
        print("Event: $0, Value: $1")
    }
}

let myClass = MyClass(wrappedValue: 10, logger: { event, value in
    print("Event: $0, Value: $1")
})

myClass.wrappedValue = 20
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    // Get the wrapped property value.
    func get() -> T.Value {
        logger(Event.get, wrapped.wrapped)
        return wrapped.wrapped
    }
    
    // Set the wrapped property value.
    func set(value: T.Value) {
        logger(Event.set, value)
        wrapped.wrapped = value
    }
}

struct MyStruct: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    // Get the wrapped property value.
    func get() -> Int {
        logger(Event.get, wrappedValue)
        return wrappedValue
    }
    
    // Set the wrapped property value.
    func set(value: Int) {
        logger(Event.set, value)
        wrappedValue = value
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    // Get the wrapped property value.
    func get() -> T.Value {
        logger(Event.get, wrapped.wrapped)
        return wrapped.wrapped
    }
    
    // Set the wrapped property value.
    func set(value: T.Value) {
        logger(Event.set, value)
        wrapped.wrapped = value
    }
}

// Example usage:
struct MyStruct: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    // Get the wrapped property value.
    func get() -> Int {
        logger(Event.get, wrappedValue)
        return wrappedValue
    }
    
    // Set the wrapped property value.
    func set(value: Int) {
        logger(Event.set, value)
        wrappedValue = value
    }
}

// Usage:
let myStruct = Logged(MyStruct(wrappedValue: 42, logger: { event, value in
    print("Event:", event, "Value:", value)
}), logger: { event, value in
    print("Event:", event, "Value:", value)
})

myStruct.get() // Prints: Event: get Value: 42
myStruct.set(value: 100) // Prints: Event: set Value: 100
myStruct.get() // Prints: Event: get Value: 100
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Wrapped<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

struct LoggedWrapper<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

struct WrappedWrapper<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

struct LoggedWrapper2<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

struct WrappedWrapper2<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
}

// The wrapped property is accessed and modified through the wrapper.
// This is the implementation of the protocol.
@propertyWrapper
struct Wrapped<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

// The wrapper class that wraps the wrapped property.
struct LoggedWrapper<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

// The wrapper class that wraps the wrapped property.
struct WrappedWrapper<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

// The wrapper class that wraps the wrapped property.
struct LoggedWrapper2<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

// The wrapper class that wraps the wrapped property.
struct WrappedWrapper2<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    associatedtype Value
    
    func get() -> T.Value {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    
    func set(value: T.Value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

// The wrapper class that wraps the wrapped property.
struct LoggedWrapper3<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event,

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = T(wrappedValue, logger)
        self.logger = logger
    }
}

extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrapped = Logged(wrappedValue, logger)
    }
}

extension LoggedProtocol {
    associatedtype Value
    var wrapped: T
    get {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    set(value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = T(wrappedValue, logger)
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrapped = Logged(wrappedValue, logger)
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    var wrapped: T
    get {
        self.logger(Event.get, self.wrapped.wrapped)
        return self.wrapped.wrapped
    }
    set(value) {
        self.logger(Event.set, value)
        self.wrapped.wrapped = value
    }
}

// Example usage:
struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    get {
        return self.wrapped
    }
    set(value) {
        self.wrapped = value
    }
}

struct MyStruct {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension MyStruct {
    associatedtype Value
    var wrapped: LoggedProtocol
    

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    // The wrapped property's setter.
    func setWrapped(_ value: T.Value) {
        self.wrapped.setWrapped(value)
        self.logger(Event.set, value)
    }
    
    // The wrapped property's getter.
    func getWrapped() -> T.Value {
        let value = self.wrapped.getWrapped()
        self.logger(Event.get, value)
        return value
    }
}

struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue = value
    }
    
    func getWrapped() -> Int {
        return self.wrappedValue
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    // The wrapped property's setter.
    func setWrapped(_ value: T.Value) {
        self.wrapped.setWrapped(value)
        self.logger(Event.set, value)
    }
    
    // The wrapped property's getter.
    func getWrapped() -> T.Value {
        let value = self.wrapped.getWrapped()
        self.logger(Event.get, value)
        return value
    }
}

// Example usage:
struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue = value
    }
    
    func getWrapped() -> Int {
        return self.wrappedValue
    }
}

// Example usage:
struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue = value
    }
    
    func getWrapped() -> Int {
        return self.wrappedValue
    }
}

// Example usage:
struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue = value
    }
    
    func getWrapped() -> Int {
        return self.wrappedValue
    }
}

// Example usage:
struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue = value
    }
    
    func getWrapped() -> Int {
        return self.wrappedValue
    }
}

// Example usage:
struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue = value
    }
    
    func getWrapped() -> Int {
        return self.wrappedValue
    }
}

// Example usage:
struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue = value
    }
    
    func getWrapped() -> Int {
        return self.wrappedValue
    }
}

// Example usage:
struct ExampleProtocol: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    // Property wrapper methods.
    func setWrapped(_ value: Int) {
        self.wrappedValue

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Protocol implementation that logs access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    // Initialize the wrapper with a wrapped value and a logger.
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = T(wrappedValue: wrappedValue, logger: logger)
    }
    
    // Get the wrapped value.
    func get() -> T.Value {
        let event = Event.get
        self.logger(event, self.wrapped.wrappedValue)
        return self.wrapped.wrappedValue
    }
    
    // Set the wrapped value.
    func set(_ value: T.Value) {
        let event = Event.set
        self.logger(event, self.wrapped.wrappedValue)
        self.wrapped.wrappedValue = value
    }
}

struct ExampleStruct {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    // Initialize the struct with a wrapped value and a logger.
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    // Initialize the wrapper with a wrapped value and a logger.
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = T(wrappedValue: wrappedValue, logger: logger)
    }
    
    // Get the wrapped value.
    func get() -> T.Value {
        let event = Event.get
        self.logger(event, self.wrapped.wrappedValue)
        return self.wrapped.wrappedValue
    }
    
    // Set the wrapped value.
    func set(_ value: T.Value) {
        let event = Event.set
        self.logger(event, self.wrapped.wrappedValue)
        self.wrapped.wrappedValue = value
    }
}

// Example usage
struct ExampleStruct {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    // Initialize the struct with a wrapped value and a logger.
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Implement the LoggedProtocol protocol for ExampleStruct.
impl LoggedProtocol for ExampleStruct {
    associatedtype Value
    
    // Initialize the wrapper with a wrapped value and a logger.
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    // Get the wrapped value.
    func get() -> Value {
        let event = Event.get
        self.logger(event, self.wrapped)
        return self.wrapped
    }
    
    // Set the wrapped value.
    func set(_ value: Value) {
        let event = Event.set
        self.logger(event, self.wrapped)
        self.wrapped = value
    }
}

// Example usage
let logger = { event, value -> print(event, " ", value) }
let wrappedStruct = Logged(wrappedValue: 42, logger: logger)
wrappedStruct.get() // Prints "get 42"
wrappedStruct.set(value: 100) // Prints "set 100"
wrappedStruct.get() // Prints "get 100"
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var value: T.Value {
        logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
    
    mutating func setValue(value: T.Value) {
        logger(Event.set, value)
        self.wrappedValue = value
    }
}

@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var wrappedProtocol: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedProtocol: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedProtocol = wrappedProtocol
        self.logger = logger
    }
    
    mutating func setWrappedProtocol(wrappedProtocol: T) {
        logger(Event.set, wrappedProtocol)
        self.wrappedProtocol = wrappedProtocol
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrappedValue: T.Value
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T.Value, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var value: T.Value {
        logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
    
    mutating func setValue(value: T.Value) {
        logger(Event.set, value)
        self.wrappedValue = value
    }
}

// Protocol wrapper that logs access and modification of the wrapped protocol.
@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var wrappedProtocol: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedProtocol: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedProtocol = wrappedProtocol
        self.logger = logger
    }
    
    mutating func setWrappedProtocol(wrappedProtocol: T) {
        logger(Event.set, wrappedProtocol)
        self.wrappedProtocol = wrappedProtocol
    }
}

// Protocol wrapper that logs access and modification of the wrapped protocol.
@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var wrappedProtocol: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedProtocol: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedProtocol = wrappedProtocol
        self.logger = logger
    }
    
    mutating func setWrappedProtocol(wrappedProtocol: T) {
        logger(Event.set, wrappedProtocol)
        self.wrappedProtocol = wrappedProtocol
    }
}

// Protocol wrapper that logs access and modification of the wrapped protocol.
@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var wrappedProtocol: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedProtocol: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedProtocol = wrappedProtocol
        self.logger = logger
    }
    
    mutating func setWrappedProtocol(wrappedProtocol: T) {
        logger(Event.set, wrappedProtocol)
        self.wrappedProtocol = wrappedProtocol
    }
}

// Protocol wrapper that logs access and modification of the wrapped protocol.
@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var wrappedProtocol: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedProtocol: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedProtocol = wrappedProtocol
        self.logger = logger
    }
    
    mutating func setWrappedProtocol(wrappedProtocol: T) {
        logger(Event.set, wrappedProtocol)
        self.wrappedProtocol = wrappedProtocol
    }
}

// Protocol wrapper that logs access and modification of the wrapped protocol.
@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var wrappedProtocol: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedProtocol: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedProtocol = wrappedProtocol
        self.logger = logger
    }
    
    mutating func setWrappedProtocol(wrappedProtocol: T) {
        logger(Event.set, wrappedProtocol)
        self.wrappedProtocol = wrappedProtocol
    }
}

// Protocol wrapper that logs access and modification of the wrapped protocol.
@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var wrappedProtocol: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedProtocol: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrappedProtocol = wrappedProtocol
        self.logger = logger
    }
    
    mutating func setWrappedProtocol(wrappedProtocol: T) {
        logger(Event.set, wrappedProtocol)
        self.wrappedProtocol = wrappedProtocol
    }
}

// Protocol wrapper that logs access and modification of the wrapped protocol.
@protocolWrapper
struct LoggedProtocolWrapper<T: LoggedProtocol> {
    var

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    // Accessor methods for the wrapped property.
    var value: T.Value {
        logger(Event.get, self.wrapped.value)
        return self.wrapped.value
    }
    
    // Mutator methods for the wrapped property.
    mutating func setValue(value: T.Value) {
        logger(Event.set, value)
        self.wrapped.value = value
    }
}

class ExampleLogger {
    var log: (Event, String) -> Void {
        // Implement your logging logic here
        print("Logging: $0")
    }
}

class ExampleProtocol: LoggedProtocol {
    var value: Int
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        super.init(wrappedValue: wrappedValue, logger: logger)
    }
}

```swift
enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<T: LoggedProtocol> {
    var wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
    
    // Accessor methods for the wrapped property.
    var value: T.Value {
        logger(Event.get, self.wrapped.value)
        return self.wrapped.value
    }
    
    // Mutator methods for the wrapped property.
    mutating func setValue(value: T.Value) {
        logger(Event.set, value)
        self.wrapped.value = value
    }
}

// Example usage
class ExampleLogger {
    var log: (Event, String) -> Void {
        // Implement your logging logic here
        print("Logging: $0")
    }
}

class ExampleProtocol: LoggedProtocol {
    var value: Int
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        super.init(wrappedValue: wrappedValue, logger: logger)
    }
}

// Example usage
let logger = ExampleLogger()
let protocol = ExampleProtocol(wrappedValue: 42, logger: logger.log)
let loggedProtocol = Logged(wrapped: protocol, logger: logger.log)

loggedProtocol.value = 100
print(loggedProtocol.value) // Output: 100
```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for a city.
                // TODO: Implement search.
                return nil
            case UserAction.keyboardCharacterSelect(_):
                // Fill search bar with typed character.
                // TODO: Implement search.
                return nil
            case UserAction.keyboardDeleteBackwards:
                // Delete typed character.
                // TODO: Implement search.
                return nil
        }
        return nil
    }
    
    func forecast(for city: String) throws -> String {
        return self.provider.forecast(for city)
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // TODO: Implement provider.
        return "Sunny"
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for a city.
                // TODO: Implement search.
                return nil
            case UserAction.keyboardCharacterSelect(_):
                // Fill search bar with typed character.
                // TODO: Implement search.
                return nil
            case UserAction.keyboardDeleteBackwards:
                // Delete typed character.
                // TODO: Implement search.
                return nil
        }
        return nil
    }
    
    func forecast(for city: String) throws -> String {
        return self.provider.forecast(for city)
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // TODO: Implement provider.
        return "Sunny"
    }
}

// Weather application.
let weatherApp = WeatherApplication(provider: WeatherProvider())

// Handle user actions.
weatherApp.handle(UserAction.searchButtonPress)
weatherApp.handle(UserAction.keyboardCharacterSelect(Character("A")))
weatherApp.handle(UserAction.keyboardDeleteBackwards)
```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for the city.
                let city = "New York"
                
                // Check the forecast.
                try {
                    let forecast = self.provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } catch {
                    return ApplicationFeedback.failure(city: city)
                }
            default:
                return nil
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check the forecast.
        return "Sunny"
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for the city.
                let city = "New York"
                
                // Check the forecast.
                try {
                    let forecast = self.provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } catch {
                    return ApplicationFeedback.failure(city: city)
                }
            default:
                return nil
        }
    }
}

// Weather provider.
// Check the forecast for the city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check the forecast.
        return "Sunny"
    }
}
```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // TODO: implement search button press
                return nil
            case UserAction.keyboardCharacterSelect(Character):
                // TODO: implement keyboard character selection
                return nil
            case UserAction.keyboardDeleteBackwards:
                // TODO: implement keyboard delete backwards
                return nil
        }
        return nil
    }
    
    func forecast(for city: String) throws -> String {
        return provider.forecast(for city)
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // TODO: implement weather provider
        return "Sunny"
    }
}

class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // TODO: implement search button press
                return nil
            case UserAction.keyboardCharacterSelect(Character):
                // TODO: implement keyboard character selection
                return nil
            case UserAction.keyboardDeleteBackwards:
                // TODO: implement keyboard delete backwards
                return nil
        }
        return nil
    }
    
    func forecast(for city: String) throws -> String {
        return provider.forecast(for city)
    }
}

// Weather provider.
// Check forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // TODO: implement weather provider
        return "Sunny"
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvi<|fim_middle|>swift
```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                return ApplicationFeedback.failure(city: "London")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                return ApplicationFeedback.failure(city: "London")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                return ApplicationFeedback.failure(city: "London")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                return ApplicationFeedback.failure(city: "London")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                return ApplicationFeedback.failure(city: "London")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                return ApplicationFeedback.failure(city: "London")
        }
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London",<|fim_middle|>swift
```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(character):
                return self.fillSearch(character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteSearch()
        }
    }
    
    func fillSearch(character: Character) -> ApplicationFeedback? {
        // Fill search bar with character.
        // Return ApplicationFeedback.success if successful, ApplicationFeedback.failure otherwise.
    }
    
    func deleteSearch() -> ApplicationFeedback? {
        // Delete character from search bar.
        // Return ApplicationFeedback.success if successful, ApplicationFeedback.failure otherwise.
    }
    
    func search() -> ApplicationFeedback? {
        // Search for forecast for current search query.
        // Return ApplicationFeedback.success if successful, ApplicationFeedback.failure otherwise.
    }
}

class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(character):
                return self.fillSearch(character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteSearch()
        }
    }
    
    func fillSearch(character: Character) -> ApplicationFeedback? {
        // Fill search bar with character.
        // Return ApplicationFeedback.success if successful, ApplicationFeedback.failure otherwise.
    }
    
    func deleteSearch() -> ApplicationFeedback? {
        // Delete character from search bar.
        // Return ApplicationFeedback.success if successful, ApplicationFeedback.failure otherwise.
    }
    
    func search() -> ApplicationFeedback? {
        // Search for forecast for current search query.
        // Return ApplicationFeedback.success if successful, ApplicationFeedback.failure otherwise.
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider implementation.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provi<|fim_middle|>
```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = try self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // do something with the character
            case UserAction.keyboardDeleteBackwards:
                // do something
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "The weather in London is 70 degrees."
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = try self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // do something with the character
            case UserAction.keyboardDeleteBackwards:
                // do something
        }
    }
}

// Weather provider.
// Fetches forecast from WeatherProvider.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "The weather in London is 70 degrees."
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = try self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // do something with the character
            case UserAction.keyboardDeleteBackwards:
                // do something
        }
    }
}

// Weather provider.
// Fetches forecast from WeatherProvider.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "The weather in London is 70 degrees."
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = try self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // do something with the character
            case UserAction.keyboardDeleteBackwards:
                // do something
        }
    }
}

// Weather provider.
// Fetches forecast from WeatherProvider.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "The weather in London is 70 degrees."
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let forecast = try self.provider.forecast(for: "London")
                return ApplicationFeedback.success(city: "London", forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // do something with the character
            case UserAction.keyboardDeleteBackwards:
                // do something
        }
    }
}

// Weather provider.
// Fetches forecast from WeatherProvider.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "The weath<|file_separator|>

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return ApplicationFeedback.success(city: "New York", forecast: "Sunny")
            case UserAction.keyboardCharacterSelect(_):
                return ApplicationFeedback.failure(city: "New York")
            case UserAction.keyboardDeleteBackwards:
                return ApplicationFeedback.failure(city: "New York")
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Sunny"
    }
}

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return ApplicationFeedback.success(city: "New York", forecast: provider.forecast(for: "New York"))
            case UserAction.keyboardCharacterSelect(_):
                return ApplicationFeedback.failure(city: "New York")
            case UserAction.keyboardDeleteBackwards:
                return ApplicationFeedback.failure(city: "New York")
        }
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return ApplicationFeedback.success(city: "New York", forecast: "Sunny")
            case UserAction.keyboardCharacterSelect(_):
                return ApplicationFeedback.failure(city: "New York")
            case UserAction.keyboardDeleteBackwards:
                return ApplicationFeedback.failure(city: "New York")
        }
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Sunny"
    }
}

// Weather application.
// Weather application that uses WeatherProvider.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return ApplicationFeedback.success(city: "New York", forecast: provider.forecast(for: "New York"))
            case UserAction.keyboardCharacterSelect(_):
                return ApplicationFeedback.failure(city: "New York")
            case UserAction.keyboardDeleteBackwards:
                return ApplicationFeedback.failure(city: "New York")
        }
    }
}

// Weather application.
// Weather application that uses WeatherProvider.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return ApplicationFeedback.success(city: "New York", forecast: provider.forecast(for: "New York"))
            case UserAction.keyboardCharacterSelect(_):
                return ApplicationFeedback.failure(city: "New York")
            case UserAction.keyboardDeleteBackwards:
                return ApplicationFeedback.failure(city: "New York")
        }
    }
}

// Weather application.
// Weather application that uses WeatherProvider.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return ApplicationFeedback.success(city: "New York", forecast: provider.forecast(for: "New York"))
            case UserAction.keyboardCharacterSelect(_):
                return ApplicationFeedback.failure(city: "New York")
            case UserAction.keyboardDeleteBackwards:
                return ApplicationFeedback.failure(city: "New York")
        }
    }
}

// Weather application.
// Weather application that uses WeatherProvider.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return ApplicationFeedback.success(city: "New York", forecast: provider.forecast(for: "New York"))
            case UserAction.keyboardCharacterSelect(_):
                return ApplicationFeedback.failure(city: "New York")
            case UserAction.keyboardDeleteBackwards:
                return ApplicationFeedback.failure(city: "New York")
        }
    }
}

// Weather application.
// Weather application that uses WeatherProvider.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: We<|fim_middle|>swift
```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for city.
                // If city is found, return success.
                // If city is not found, return failure.
                return nil
            case UserAction.keyboardCharacterSelect(_):
                // Fill search bar results.
                return nil
            case UserAction.keyboardDeleteBackwards:
                // Delete last character from search bar.
                return nil
        }
        return nil
    }
    
    func forecast(for city: String) throws -> String {
        return provider.forecast(for city: city)
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check weather forecast for given city.
        // If forecast is found, return forecast.
        // If forecast is not found, throw error.
        return "Sunny"
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for city.
                // If city is found, return success.
                // If city is not found, return failure.
                return nil
            case UserAction.keyboardCharacterSelect(_):
                // Fill search bar results.
                return nil
            case UserAction.keyboardDeleteBackwards:
                // Delete last character from search bar.
                return nil
        }
        return nil
    }
    
    func forecast(for city: String) throws -> String {
        return provider.forecast(for city: city)
    }
}

// Weather provider.
// Check weather forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check weather forecast for given city.
        // If forecast is found, return forecast.
        // If forecast is not found, throw error.
        return "Sunny"
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for city.
                // If city is found, return success.
                // If city is not found, return failure.
                return nil
            case UserAction.keyboardCharacterSelect(_):
                // Fill search bar results.
                return nil
            case UserAction.keyboardDeleteBackwards:
                // Delete last character from search bar.
                return nil
        }
        return nil
    }
    
    func forecast(for city: String) throws -> String {
        return provider.forecast(for city: city)
    }
}

// Weather provider.
// Check weather forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check weather forecast for given city.
        // If forecast is found, return forecast.
        // If forecast is not found, throw error.
        return "Sunny"
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search for city.
                // If city is found, return success.
                // If city is not found, return failure.
                return nil
            case UserAction.keyboardCharacterSelect(_):
                // Fill search bar results.
                return nil
            case UserAction.keyboardDeleteBackwards:
                // Delete last character from search bar.
                retu<|fim_middle|>swift```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.search()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = "New York"
        try {
            let forecast = self.provider.forecast(for: city)
            return ApplicationFeedback.success(city: city, forecast: forecast)
        } catch {
            return ApplicationFeedback.failure(city: city)
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Simulate fetching weather forecast from a weather service.
        // In a real application, this would be a network request.
        return "Sunny"
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.search()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = "New York"
        try {
            let forecast = self.provider.forecast(for: city)
            return ApplicationFeedback.success(city: city, forecast: forecast)
        } catch {
            return ApplicationFeedback.failure(city: city)
        }
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Simulate fetching weather forecast from a weather service.
        // In a real application, this would be a network request.
        return "Sunny"
    }
}

// Weather application provider.
// Provide weather forecast for a given city.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.search()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = "New York"
        try {
            let forecast = self.provider.forecast(for: city)
            return ApplicationFeedback.success(city: city, forecast: forecast)
        } catch {
            return ApplicationFeedback.failure(city: city)
        }
    }
}

// Weather application provider.
// Provide weather forecast for a given city.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.search()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = "New York"
        try {
            let forecast = self.provider.forecast(for: city)
            return ApplicationFeedback.success(city: city, forecast: forecast)
        } catch {
            return ApplicationFeedback.failure(city: city)
        }
    }
}

// Weather application provider.
// Provide weather forecast for a given city.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.search()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = "New York"
        try {
            let forecast = self.provider.forecast(for: city)
            return ApplicationFeedback.success(city: city, forecast: forecast)
        } catch {
            return ApplicationFeedback.failure(city: city)
        }
    }
}

// Weather application provider.
// Provide weather forecast for a given city.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provi<|fim_middle|>```

protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search button pressed.
                // Fetch forecast for the selected city.
                let city = "New York"
                let forecast = try self.provider.forecast(for city: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // Character selected in the search bar.
                // Update the search bar with the selected character.
                let selectedCharacter = Character(character: "A")
                return ApplicationFeedback.success(city: "New York", forecast: "Sunny")
            case UserAction.keyboardDeleteBackwards:
                // Backspace pressed in the search bar.
                // Remove the last character from the search bar.
                let newCity = "New York"
                return ApplicationFeedback.success(city: newCity, forecast: "Sunny")
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Fetch forecast for the given city from a weather service.
        return "Sunny"
    }
}

```swift
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

enum UserAction {
    case keyboardCharacterSelect(Character)
    case keyboardDeleteBackwards
    case searchButtonPress
}

enum ApplicationFeedback: Equatable {
    case success(city: String, forecast: String)
    case failure(city: String)
}

protocol WeatherApplicationDependencies {
    init(provider: WeatherProvider)
}

protocol WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback?
}

typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search button pressed.
                // Fetch forecast for the selected city.
                let city = "New York"
                let forecast = try self.provider.forecast(for city: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // Character selected in the search bar.
                // Update the search bar with the selected character.
                let selectedCharacter = Character(character: "A")
                return ApplicationFeedback.success(city: "New York", forecast: "Sunny")
            case UserAction.keyboardDeleteBackwards:
                // Backspace pressed in the search bar.
                // Remove the last character from the search bar.
                let newCity = "New York"
                return ApplicationFeedback.success(city: newCity, forecast: "Sunny")
        }
    }
}

// Weather provider implementation.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Fetch forecast for the given city from a weather service.
        return "Sunny"
    }
}

// Weather application provider.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                // Search button pressed.
                // Fetch forecast for the selected city.
                let city = "New York"
                let forecast = try self.provider.forecast(for city: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(Character):
                // Character selected in the search bar.
                // Update the search bar with the selected character.
                let selectedCharacter = Character(character: "A")
                return ApplicationFeedback.success(city: "New York",<|fim_middle|>```

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    // The balance of the bank account.
    var balance: Double { get async, set async }

    // Initializes the bank account with the given balance.
    init(balance: Double) {
        self.balance = balance
    }

    // Deposits the given amount into the bank account.
    func deposit(amount: Double) async {
        // Atomically add the amount to the balance.
        self.balance += amount
    }

    // Withdraws the given amount from the bank account.
    // Returns true if the withdrawal was successful, false otherwise.
    func withdraw(amount: Double) async -> Bool {
        // Atomically subtract the amount from the balance.
        if self.balance >= amount {
            self.balance -= amount
            return true
        }
        return false
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // The balance of the bank account.
    var balance: Double { get async, set async }

    // Initializes the bank account with the given balance.
    init(balance: Double) {
        self.balance = balance
    }

    // Deposits the given amount into the bank account.
    func deposit(amount: Double) async {
        // Atomically add the amount to the balance.
        self.balance += amount
    }

    // Withdraws the given amount from the bank account.
    // Returns true if the withdrawal was successful, false otherwise.
    func withdraw(amount: Double) async -> Bool {
        // Atomically subtract the amount from the balance.
        if self.balance >= amount {
            self.balance -= amount
            return true
        }
        return false
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // The balance of the bank account.
    var balance: Double { get async, set async }

    // Initializes the bank account with the given balance.
    init(balance: Double) {
        self.balance = balance
    }

    // Deposits the given amount into the bank account.
    func deposit(amount: Double) async {
        // Atomically add the amount to the balance.
        self.balance += amount
    }

    // Withdraws the given amount from the bank account.
    // Returns true if the withdrawal was successful, false otherwise.
    func withdraw(amount: Double) async -> Bool {
        // Atomically subtract the amount from the balance.
        if self.balance >= amount {
            self.balance -= amount
            return true
        }
        return false
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // The balance of the bank account.
    var balance: Double { get async, set async }

    // Initializes the bank account with the given balance.
    init(balance: Double) {
        self.balance = balance
    }

    // Deposits the given amount into the bank account.
    func deposit(amount: Double) async {
        // Atomically add the amount to the balance.
        self.balance += amount
    }

    // Withdraws the given amount from the bank account.
    // Returns true if the withdrawal was successful, false otherwise.
    func withdraw(amount: Double) async -> Bool {
        // Atomically subtract the amount from the balance.
        if self.balance >= amount {
            self.balance -= amount
            return true
        }
        return false
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // The balance of the bank account.
    var balance: Double { get async, set async }

    // Initializes the bank account with the given balance.
    init(balance: Double) {
        self.balance = balance
    }

    // Deposits the given amount into the bank account.
    func deposit(amount: Double) async {
        // Atomically add the amount to the balance.
        self.balance += amount
    }

    // Withdraws the given amount from the bank account.
    // Returns true if the withdrawal was successful, false otherwise.
    func withdraw(amount: Double) async -> Bool {
        // Atomically subtract the amount from the balance.
        if self.balance >= amount {
            self.balance -= amount
            return true
        }
        return false
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // The balance of the bank account.
    var balance: Double { get async, set async }

    // Initializes the bank account with the given balance.
    init(balance: Double) {
        self.balance = balance
    }

    // Deposits the given amount into the bank account.
    func deposit(amount: Double) async {
        // Atomically add the amount to the balance.
        self.balance += amount
    }

    // Withdraws the given amount from the bank account.
    // Returns true if the withdrawal was successful, false otherwise.
    func withdraw(amount: Double) async

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() async -> Double {
        return balance
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() async -> Double {
        return balance
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() async -> Double {
        return balance
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() async -> Double {
        return balance
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() async -> Double {
        return balance
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() async -> Double {
        return balance
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transa<|fim_middle|>swift<|file_separator|>

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    // The actor's state, which includes the balance and a channel for receiving deposits and withdrawals.
    var balance: Double
    let channel = Channel<Double>()

    // Initializer for the bank account.
    init(balance: Double) {
        self.balance = balance
    }

    // Getter for the balance.
    var self.balance: Double {
        return self.balance
    }

    // Method to deposit money into the account.
    func deposit(amount: Double) async {
        // Deposit the amount into the balance.
        self.balance += amount
        // Send the updated balance to the channel.
        channel.send(self.balance)
    }

    // Method to withdraw money from the account.
    func withdraw(amount: Double) async -> Bool {
        // Check if there is enough balance to withdraw.
        if self.balance >= amount {
            // Withdraw the amount from the balance.
            self.balance -= amount
            // Send the updated balance to the channel.
            channel.send(self.balance)
            return true
        } else {
            return false
        }
    }

    // Method to get the balance from the channel.
    func balanceFromChannel() async -> Double {
        return channel.receive()
    }
}

func deposit(account BankAccountProtocol, amount: Double) async {
    // Deposit the amount into the account.
    account.deposit(amount)
    // Wait for the balance to be updated.
    let balance = account.balanceFromChannel()
    // Print the updated balance.
    print("Updated balance: \(balance)")
}

func withdraw(account BankAccountProtocol, amount: Double) async {
    // Withdraw the amount from the account.
    let success = account.withdraw(amount)
    // Wait for the balance to be updated.
    let balance = account.balanceFromChannel()
    // Print the result of the withdrawal.
    print("Withdrawal successful: \(success), Updated balance: \(balance)")
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // The actor's state, which includes the balance and a channel for receiving deposits and withdrawals.
    var balance: Double
    let channel = Channel<Double>()

    // Initializer for the bank account.
    init(balance: Double) {
        self.balance = balance
    }

    // Getter for the balance.
    var self.balance: Double {
        return self.balance
    }

    // Method to deposit money into the account.
    func deposit(amount: Double) async {
        // Deposit the amount into the balance.
        self.balance += amount
        // Send the updated balance to the channel.
        channel.send(self.balance)
    }

    // Method to withdraw money from the account.
    func withdraw(amount: Double) async -> Bool {
        // Check if there is enough balance to withdraw.
        if self.balance >= amount {
            // Withdraw the amount from the balance.
            self.balance -= amount
            // Send the updated balance to the channel.
            channel.send(self.balance)
            return true
        } else {
            return false
        }
    }

    // Method to get the balance from the channel.
    func balanceFromChannel() async -> Double {
        return channel.receive()
    }
}

// Function to perform a deposit in a bank account.
func deposit(account BankAccountProtocol, amount: Double) async {
    // Deposit the amount into the account.
    account.deposit(amount)
    // Wait for the balance to be updated.
    let balance = account.balanceFromChannel()
    // Print the updated balance.
    print("Updated balance: \(balance)")
}

// Function to perform a withdrawal in a bank account.
func withdraw(account BankAccountProtocol, amount: Double) async {
    // Withdraw the amount from the account.
    let success = account.withdraw(amount)
    // Wait for the balance to be updated.
    let balance = account.balanceFromChannel()
    // Print the result of the withdrawal.
    print("Withdrawal successful: \(success), Updated balance: \(balance)")
}

// Example usage:
let account = BankAccount(balance: 100.0)

// Deposit 50.0 into the account.
deposit(account, amount: 50.0)

// Withdraw 20.0 from the account.
withdraw(account, amount: 20.0)
```

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    // Private mutable state
    private var _balance: Double = 0.0
    private var _actor: Actor<BankAccountProtocol> = Actor(this)

    // Initializer
    init(balance: Double) {
        _balance = balance
    }

    // Getter for the balance property
    override var balance: Double {
        return _balance
    }

    // Deposit method that sends a deposit transaction to the actor
    override func deposit(amount: Double) async {
        _actor.send(BankAccountProtocol.deposit(amount))
    }

    // Withdraw method that sends a withdrawal transaction to the actor and returns a Boolean indicating whether the withdrawal was successful
    override func withdraw(amount: Double) async -> Bool {
        return _actor.send(BankAccountProtocol.withdraw(amount))
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // Private mutable state
    private var _balance: Double = 0.0
    private var _actor: Actor<BankAccountProtocol> = Actor(this)

    // Initializer
    init(balance: Double) {
        _balance = balance
    }

    // Getter for the balance property
    override var balance: Double {
        return _balance
    }

    // Deposit method that sends a deposit transaction to the actor
    override func deposit(amount: Double) async {
        _actor.send(BankAccountProtocol.deposit(amount))
    }

    // Withdraw method that sends a withdrawal transaction to the actor and returns a Boolean indicating whether the withdrawal was successful
    override func withdraw(amount: Double) async -> Bool {
        return _actor.send(BankAccountProtocol.withdraw(amount))
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // Private mutable state
    private var _balance: Double = 0.0
    private var _actor: Actor<BankAccountProtocol> = Actor(this)

    // Initializer
    init(balance: Double) {
        _balance = balance
    }

    // Getter for the balance property
    override var balance: Double {
        return _balance
    }

    // Deposit method that sends a deposit transaction to the actor
    override func deposit(amount: Double) async {
        _actor.send(BankAccountProtocol.deposit(amount))
    }

    // Withdraw method that sends a withdrawal transaction to the actor and returns a Boolean indicating whether the withdrawal was successful
    override func withdraw(amount: Double) async -> Bool {
        return _actor.send(BankAccountProtocol.withdraw(amount))
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // Private mutable state
    private var _balance: Double = 0.0
    private var _actor: Actor<BankAccountProtocol> = Actor(this)

    // Initializer
    init(balance: Double) {
        _balance = balance
    }

    // Getter for the balance property
    override var balance: Double {
        return _balance
    }

    // Deposit method that sends a deposit transaction to the actor
    override func deposit(amount: Double) async {
        _actor.send(BankAccountProtocol.deposit(amount))
    }

    // Withdraw method that sends a withdrawal transaction to the actor and returns a Boolean indicating whether the withdrawal was successful
    override func withdraw(amount: Double) async -> Bool {
        return _actor.send(BankAccountProtocol.withdraw(amount))
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // Private mutable state
    private var _balance: Double = 0.0
    private var _actor: Actor<BankAccountProtocol> = Actor(this)

    // Initializer
    init(balance: Double) {
        _balance = balance
    }

    // Getter for the balance property
    override var balance: Double {
        return _balance
    }

    // Deposit method that sends a deposit transaction to the actor
    override func deposit(amount: Double) async {
        _actor.send(BankAccountProtocol.deposit(amount))
    }

    // Withdraw method that sends a withdrawal transaction to the actor and returns a Boolean indicating whether the withdrawal was successful
    override func withdraw(amount: Double) async -> Bool {
        return _actor.send(BankAccountProtocol.withdraw(amount))
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and trans<|fim_middle|>swift
```

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactio<|fim_suffix|>natomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    // The actor's state
    var balance: Double { get async }
    var actor: Actor
    
    // Initialize the account with the given balance
    init(balance: Double) {
        self.balance = balance
        self.actor = Actor(self)
    }
    
    // Deposit the given amount into the account
    func deposit(amount: Double) async {
        // Perform the deposit operation asynchronously
        actor.send(Deposit(amount: amount))
    }
    
    // Withdraw the given amount from the account
    func withdraw(amount: Double) async -> Bool {
        // Perform the withdrawal operation asynchronously
        let result = actor.send(Withdraw(amount: amount))
        // Return the result of the withdrawal operation
        return result
    }
}

struct Deposit: BankAccountProtocol.ActorMessage {
    var amount: Double
}

struct Withdraw: BankAccountProtocol.ActorMessage {
    var amount: Double
}

actor BankAccount.Actor: Actor {
    // The actor's state
    var account: BankAccountProtocol
    var actor: Actor
    
    // Initialize the actor with the given account
    init(account: BankAccountProtocol) {
        self.account = account
        self.actor = Actor(self)
    }
    
    // Handle deposit operation
    func handle(message: Deposit) async {
        // Perform the deposit operation asynchronously
        actor.send(Deposit(amount: message.amount))
    }
    
    // Handle withdrawal operation
    func handle(message: Withdraw) async -> Bool {
        // Perform the withdrawal operation asynchronously
        let result = actor.send(Withdraw(amount: message.amount))
        // Return the result of the withdrawal operation
        return result
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    // The actor's state
    var balance: Double { get async }
    var actor: Actor
    
    // Initialize the account with the given balance
    init(balance: Double) {
        self.balance = balance
        self.actor = Actor(self)
    }
    
    // Deposit the given amount into the account
    func deposit(amount: Double) async {
        // Perform the deposit operation asynchronously
        actor.send(Deposit(amount: amount))
    }
    
    // Withdraw the given amount from the account
    func withdraw(amount: Double) async -> Bool {
        // Perform the withdrawal operation asynchronously
        let result = actor.send(Withdraw(amount: amount))
        // Return the result of the withdrawal operation
        return result
    }
}

// Deposit operation
struct Deposit: BankAccountProtocol.ActorMessage {
    var amount: Double
}

// Withdraw operation
struct Withdraw: BankAccountProtocol.ActorMessage {
    var amount: Double
}

// Actor that allows asynchronous deposits and withdrawals
actor BankAccount.Actor: Actor {
    // The actor's state
    var account: BankAccountProtocol
    var actor: Actor
    
    // Initialize the actor with the given account
    init(account: BankAccountProtocol) {
        self.account = account
        self.actor = Actor(self)
    }
    
    // Handle deposit operation
    func handle(message: Deposit) async {
        // Perform the deposit operation asynchronously
        actor.send(Deposit(amount: message.amount))
    }
    
    // Handle withdrawal operation
    func handle(message: Withdraw) async -> Bool {
        // Perform the withdrawal operation asynchronously
        let result = actor.send(Withdraw(amount: message.amount))
        // Return the result of the withdrawal operation
        return result
    }
}

// Example usage
let account = BankAccount(balance: 1000.0)
account.deposit(amount: 500.0)
let result = account.withdraw(amount: 200.0)
print(result) // true
```

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func deposit(amount: Double) async {
        self.balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func deposit(amount: Double) async {
        self.balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func deposit(amount: Double) async {
        self.balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func deposit(amount: Double) async {
        self.balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func deposit(amount: Double) async {
        self.balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func deposit(amount: Double) async {
        self.balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func deposit(amount: Double) async {
        self.balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transa<|fim_suffix|>
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor(this)
    
    func init(balance: Double) {
        self.balance = balance
    }
    
    func

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

struct BankAccountClient {
    var account: BankAccountProtocol
    
    init(account: BankAccountProtocol) {
        self.account = account
    }
    
    func deposit(amount: Double) async {
        await self.account.deposit(amount)
        print("Deposited: $", amount)
    }
    
    func withdraw(amount: Double) async -> Bool {
        let success = await self.account.withdraw(amount)
        if success {
            print("Withdrew: $", amount)
        } else {
            print("Insufficient funds")
        }
        return success
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    func deposit(amount: Double) async {
        balance += amount
    }
    
    func withdraw(amount: Double) async -> Bool {
        if balance >= amount {
            balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Client code that uses the BankAccount protocol to interact with the bank account.
struct BankAccountClient {
    var account: BankAccountProtocol
    
    init(account: BankAccountProtocol) {
        self.account = account
    }
    
    func deposit(amount: Double) async {
        await self.account.deposit(amount)
        print("Deposited: $", amount)
    }
    
    func withdraw(amount: Double) async -> Bool {
        let success = await self.account.withdraw(amount)
        if success {
            print("Withdrew: $", amount)
        } else {
            print("Insufficient funds")
        }
        return success
    }
}

// Example usage
let account = BankAccount(balance: 1000.0)
let client = BankAccountClient(account: account)

client.deposit(amount: 500.0)
client.withdraw(amount: 200.0)
client.withdraw(amount: 1500.0) // This should result in an error
```

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() -> Double {
        return balance
    }
}

class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() -> Double {
        return balance
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() -> Double {
        return balance
    }
}

// Bank account class that implements the BankAccountProtocol protocol.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() -> Double {
        return balance
    }
}

// Bank account class that implements the BankAccountProtocol protocol.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() -> Double {
        return balance
    }
}

// Bank account class that implements the BankAccountProtocol protocol.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() -> Double {
        return balance
    }
}

// Bank account class that implements the BankAccountProtocol protocol.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return false
        }
        withdrawalQueue.enqueue(amount)
        await withdrawalQueue.dequeue()
        return true
    }

    func getBalance() -> Double {
        return balance
    }
}

// Bank account class that implements the BankAccountProtocol protocol.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var depositQueue: Queue<Double> = Queue<Double>()
    var withdrawalQueue: Queue<Double> = Queue<Double>()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        depositQueue.enqueue(amount)
        await depositQueue.dequeue()
    }

    func withdraw(amount: Double) async -> Bool {
        if amount > balance {
            return

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        actor.send(deposit: amount)
    }

    func withdraw(amount: Double) async -> Bool {
        let result = await actor.send(withdraw: amount)
        return result
    }

    func deposit(amount: Double) {
        self.balance += amount
    }

    func withdraw(amount: Double) -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

```swift
protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        actor.send(deposit: amount)
    }

    func withdraw(amount: Double) async -> Bool {
        let result = await actor.send(withdraw: amount)
        return result
    }

    func deposit(amount: Double) {
        self.balance += amount
    }

    func withdraw(amount: Double) -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        actor.send(deposit: amount)
    }

    func withdraw(amount: Double) async -> Bool {
        let result = await actor.send(withdraw: amount)
        return result
    }

    func deposit(amount: Double) {
        self.balance += amount
    }

    func withdraw(amount: Double) -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        actor.send(deposit: amount)
    }

    func withdraw(amount: Double) async -> Bool {
        let result = await actor.send(withdraw: amount)
        return result
    }

    func deposit(amount: Double) {
        self.balance += amount
    }

    func withdraw(amount: Double) -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        actor.send(deposit: amount)
    }

    func withdraw(amount: Double) async -> Bool {
        let result = await actor.send(withdraw: amount)
        return result
    }

    func deposit(amount: Double) {
        self.balance += amount
    }

    func withdraw(amount: Double) -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals, ensuring that the account balance remains consistent and transactions are atomic.
actor BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    var actor: Actor<BankAccountProtocol> = Actor()

    init(balance: Double) {
        self.balance = balance
    }

    func deposit(amount: Double) async {
        actor.send(deposit: amount)
    }

    func withdraw(amount: Double) async -> Bool {
        let result = await actor.send(withdraw: amount)
        return result
    }

    func deposit(amount: Double) {
        self.balance += amount
    }

    func withdraw(amount: Double) -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using an actor that allows asynchronous deposits and withdrawals,

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

@propertyWrapper
struct Cached<Value: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

@propertyWrapper
struct Cached<Value: AnyObject, Condition>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: Condition
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: Condition) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

@propertyWrapper
struct Cached<Value: AnyObject, Condition: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: Condition
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: Condition) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

@propertyWrapper
struct Cached<Value: AnyObject, Condition: AnyObject, Condition2: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: Condition
    var condition2: Condition2
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: Condition, condition2: Condition2) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.condition2 = condition2
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        if !self.condition2() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: AnyObject, Condition>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: Condition
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: Condition) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: AnyObject, Condition: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: Condition
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: Condition) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: AnyObject, Condition: AnyObject, Condition2: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: Condition
    var condition2: Condition2
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: Condition, condition2: Condition2) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.condition2 = condition2
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.cachedValue
        }
        if !self.condition2() {
            return self.cachedValue
        }
        self.cachedValue = self.wrappedValue()
        return self.cachedValue
    }
    
    func value() -> Value {
        return self.computeValue()
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: AnyObject, Condition: AnyObject, Condition2: AnyObject, Condition3: Any

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    @objc(name: "cachedValue")
    var value: Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    @objc(name: "cachedValue")
    var value: Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    @objc(name: "cachedValue")
    var value: Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}
```

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    func value {
        if self.lastCondition && self.lastValue == self.wrappedValue() {
            return self.lastValue
        }
        self.lastValue = self.wrappedValue()
        self.lastCondition = self.condition()
        return self.lastValue
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    func value {
        if self.lastCondition && self.lastValue == self.wrappedValue() {
            return self.lastValue
        }
        self.lastValue = self.wrappedValue()
        self.lastCondition = self.condition()
        return self.lastValue
    }
}
```

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

@propertyWrapper
struct Cached<Value: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

@propertyWrapper
struct Cached<Value: Protocol, Protocol: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

@propertyWrapper
struct Cached<Value: Protocol, Protocol: Protocol>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: Protocol, Protocol: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: Protocol, Protocol: AnyObject>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: Protocol, Protocol: Protocol>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func value {
        if self.condition() {
            self.cachedValue = self.wrappedValue()
        }
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value: Protocol, Protocol: Protocol<|file_separator|>

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var _cachedValue: Value?
    var _cachedCondition: Bool?
    var _cachedConditionChanged: Bool
    var _cachedConditionChangedLock: Lock
    var _cachedConditionChangedCondition: @escaping () -> Bool
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedConditionChangedConditionLock: Lock
    var _cachedCondition

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.wrappedValue()
        }
        
        let value = self.wrappedValue()
        self.cachedValue = value
        return value
    }
    
    func value() -> Value {
        if !self.condition() {
            return self.computeValue()
        }
        
        return self.cachedValue
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.wrappedValue()
        }
        
        let value = self.wrappedValue()
        self.cachedValue = value
        return value
    }
    
    func value() -> Value {
        if !self.condition() {
            return self.computeValue()
        }
        
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.wrappedValue()
        }
        
        let value = self.wrappedValue()
        self.cachedValue = value
        return value
    }
    
    func value() -> Value {
        if !self.condition() {
            return self.computeValue()
        }
        
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.wrappedValue()
        }
        
        let value = self.wrappedValue()
        self.cachedValue = value
        return value
    }
    
    func value() -> Value {
        if !self.condition() {
            return self.computeValue()
        }
        
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.wrappedValue()
        }
        
        let value = self.wrappedValue()
        self.cachedValue = value
        return value
    }
    
    func value() -> Value {
        if !self.condition() {
            return self.computeValue()
        }
        
        return self.cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.cachedValue = wrappedValue()
    }
    
    func computeValue() -> Value {
        if !self.condition() {
            return self.wrappedValue()
        }
        
        let value = self.wrappedValue()
        self.cachedValue = value
        return value
    }
    
    func value() -> Value

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    
    func value {
        if self.lastCondition {
            self.lastValue = self.wrappedValue()
        }
        if self.condition() {
            self.lastCondition = true
            self.lastValue = self.wrappedValue()
        } else {
            self.lastCondition = false
        }
        return self.lastValue
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    
    func value {
        if self.lastCondition {
            self.lastValue = self.wrappedValue()
        }
        if self.condition() {
            self.lastCondition = true
            self.lastValue = self.wrappedValue()
        } else {
            self.lastCondition = false
        }
        return self.lastValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    
    func value {
        if self.lastCondition {
            self.lastValue = self.wrappedValue()
        }
        if self.condition() {
            self.lastCondition = true
            self.lastValue = self.wrappedValue()
        } else {
            self.lastCondition = false
        }
        return self.lastValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    
    func value {
        if self.lastCondition {
            self.lastValue = self.wrappedValue()
        }
        if self.condition() {
            self.lastCondition = true
            self.lastValue = self.wrappedValue()
        } else {
            self.lastCondition = false
        }
        return self.lastValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    
    func value {
        if self.lastCondition {
            self.lastValue = self.wrappedValue()
        }
        if self.condition() {
            self.lastCondition = true
            self.lastValue = self.wrappedValue()
        } else {
            self.lastCondition = false
        }
        return self.lastValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var value: Value
    var lastCondition: Bool
    var lastValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self.lastCondition = false
        self.lastValue = nil!
    }
    
    func value {
        if self.lastCondition {
            self.lastValue = self.wrappedValue()
        }
        if self.condition() {
            self

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when the value of the property changes.
@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when the value of the property changes.
@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when the value of the property changes.
@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when the value of the property changes.
@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when the value of the property changes.
@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when the value of the property changes.
@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var cachedValue: Value
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
    }
    
    func computeValue() -> Value {
        if condition() {
            cachedValue = wrappedValue()
        }
        return cachedValue
    }
}

// Property wrapper that caches the computed value of a property and recomputes it only when the value of the property changes.
@propertyWrapper
struct CachedProperty<Value>: CachedProperty {
    

protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var _value: Value?
    var _condition: Bool
    var _lock: Lock
    var _conditionLock: Lock
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self._value = nil
        self._condition = false
        self._lock = Lock()
        self._conditionLock = Lock()
    }
    
    func value {
        guard self._condition else {
            self._conditionLock.lock()
            if self._condition {
                self._value = self.wrappedValue()
                self._condition = false
            }
            self._conditionLock.unlock()
        }
        return self._value!
    }
    
    func condition {
        return self._condition
    }
    
    func setCondition(condition: Bool) {
        self._conditionLock.lock()
        self._condition = condition
        self._conditionLock.unlock()
    }
    
    func lock {
        self._lock.lock()
    }
    
    func unlock {
        self._lock.unlock()
    }
}

```swift
protocol CachedProperty {
    associatedtype Value
    init(wrappedValue: @autoclosure @escaping () -> Value, condition: @escaping () -> Bool)
}

// Property wrapper that caches the computed value of a property and recomputes it only when a specified condition changes.
@propertyWrapper
struct Cached<Value>: CachedProperty {
    var wrappedValue: @escaping () -> Value
    var condition: @escaping () -> Bool
    var _value: Value?
    var _condition: Bool
    var _lock: Lock
    var _conditionLock: Lock
    
    init(wrappedValue: @escaping () -> Value, condition: @escaping () -> Bool) {
        self.wrappedValue = wrappedValue
        self.condition = condition
        self._value = nil
        self._condition = false
        self._lock = Lock()
        self._conditionLock = Lock()
    }
    
    func value {
        guard self._condition else {
            self._conditionLock.lock()
            if self._condition {
                self._value = self.wrappedValue()
                self._condition = false
            }
            self._conditionLock.unlock()
        }
        return self._value!
    }
    
    func condition {
        return self._condition
    }
    
    func setCondition(condition: Bool) {
        self._conditionLock.lock()
        self._condition = condition
        self._conditionLock.unlock()
    }
    
    func lock {
        self._lock.lock()
    }
    
    func unlock {
        self._lock.unlock()
    }
}
```

infix operator >>>: FunctionCompositionPrecedence

precedencegroup FunctionCompositionPrecedence {
    associativity: left
    precedence: 10
    right associativity
    left: (Function, Function) -> Function
}

```swift
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
    associativity: left
    precedence: 10
    right associativity
    left: (Function, Function) -> Function
}

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions

infix operator >>>: FunctionCompositionPrecedence

precedencegroup FunctionCompositionPrecedence {
    associativity: left
    higherThan: FunctionCompositionPrecedence
    rightAssociativity: false
    leftAssociativity: true
    precedence: 1000
    
    // Define the composition operator for two functions.
    operator <<>> (left: Function, right: Function) {
        return { x in right(left(x)) }
    }
}

func greet(name: String) -> String {
    return "Hello, " + name + "!"
}

func exclaim(message: String) -> String {
    return message + "!"
}

```swift
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
    associativity: left
    higherThan: FunctionCompositionPrecedence
    rightAssociativity: false
    leftAssociativity: true
    precedence: 1000
    
    // Define the composition operator for two functions.
    operator <<>> (left: Function, right: Function) {
        return { x in right(left(x)) }
    }
}

// Define a function that takes a string and returns a string.
func greet(name: String) -> String {
    return "Hello, " + name + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func exclaim(message: String) -> String {
    return message + "!"
}

// Define a function that takes a string and returns a string.
func

infix operator >>>: FunctionCompositionPrecedence

precedencegroup FunctionCompositionPrecedence {
    associativity: left
    precedence: 10
    right associativity
    right: FunctionCompositionPrecedence
}

infix operator >>>: FunctionCompositionPrecedence {

```swift
infix operator >>>: FunctionCompositionPrecedence

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
precedencegroup FunctionCompositionPrecedence {
    associativity: left
    precedence: 10
    right associativity
    right: FunctionCompositionPrecedence
}

infix operator >>>: FunctionCompositionPrecedence {
    return FunctionCompositionPrecedence(self, other)
}

// Custom infix operator >>> that composes two functions. The operator should take two functions and return a new function that represents the composition of the two functions (i.e., the output of the first function becomes the input of the second function).
class FunctionCompositionPrecedence {
    public let first: Function
    public let second: Function
    public let precedence: Int
    public let associativity: Associativity
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let left: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public let right: FunctionCompositionPrecedence
    public let associativity: Associativity
    public let precedence: Int
    public let rightAssociativity: Bool
    public let right: FunctionCompositionPrecedence
    public let leftAssociativity: Bool
    public let left: FunctionCompositionPrecedence
    public