typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    var (
        json = JSON()
        stack = [json]
    )
    
    for _, token in string.components(separatedBy: ",") {
        switch token {
            case "{" {
                stack.append(JSON())
            }
            case "[" {
                stack.append([String: Any]() as JSON)
            }
            case "]" {
                stack.pop()
            }
            case "}" {
                stack.pop()
            }
            case ":" {
                continue
            }
            case "true" {
                stack.last[String(describing: "true")] = true
            }
            case "false" {
                stack.last[String(describing: "false")] = false
            }
            case "null" {
                stack.last[String(describing: "null")] = nil
            }
            default {
                var (
                    key, value = token.split(from: String(describing: ":"))
                    key = key.trim()
                    value = value.trim()
                )
                
                if value.contains(prefix: "0x") {
                    value = value.removePrefix(prefix: "0x")
                    stack.last[key] = UInt(rawValue: value, radix: 16)
                } else {
                    stack.last[key] = value
                }
            }
        }
    }
    
    return stack.last
}

func serialize(json: JSON) throws -> String {
    var (
        stack = [json]
        result = String()
    )
    
    while let item = stack.last {
        switch item {
            case true, false, nil {
                result += String(describing: item.toString())
            }
            case UInt(rawValue: String(describing: "0x")) {
                result += String(describing: "0x" + item.toString())
            }
            case String(describing: String) {
                result += String(describing: item.toString())
            }
            case [String: Any]() {
                result += "["
                stack.append([String: Any]() as JSON)
            }
            case JSON() {
                result += "{"
                stack.append(JSON() as JSON)
            }
            default {
                var (
                    key, value = item.keys.first!, item[key]
                )
                
                result += key + ":" + serialize(value)
            }
        }
        
        stack.pop()
    }
    
    return result
}

func parse(string: String) throws -> JSON {
    return parse(string: string)
}

func serialize(json: JSON) throws -> String {
    return serialize(json: 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 {
    var (
        json = JSON()
        stack = [json]
    )
    
    for _, token in string.components(separatedBy: ",") {
        switch token {
            case "{" {
                stack.append(JSON())
            }
            case "[" {
                stack.append([String: Any]() as JSON)
            }
            case "]" {
                stack.pop()
            }
            case "}" {
                stack.pop()
            }
            case ":" {
                continue
            }
            case "true" {
                stack.last[String(describing: "true")] = true
            }
            case "false" {
                stack.last[String(describing: "false")] = false
            }
            case "null" {
                stack.last[String(describing: "null")] = nil
            }
            default {
                var (
                    key, value = token.split(from: String(describing: ":"))
                    key = key.trim()
                    value = value.trim()
                )
                
                if value.contains(prefix: "0x") {
                    value = value.removePrefix(prefix: "0x")
                    stack.last[key] = UInt(rawValue: value, radix: 16)
                } else {
                    stack.last[key] = value
                }
            }
        }
    }
    
    return stack.last
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    var (
        stack = [json]
        result = String()
    )
    
    while let item = stack.last {
        switch item {
            case true, false, nil {
                result += String(describing: item.toString())
            }
            case UInt(rawValue: String(describing: "0x")) {
                result += String(describing: "0x" + item.toString())
            }
            case String(describing: String) {
                result += String(describing: item.toString())
            }
            case [String: Any]() {
                result += "["
                stack.append([String: Any]() as JSON)
            }
            case JSON() {
                result += "{"
                stack.append(JSON() as JSON)
            }
            default {
                var (
                    key, value = item.keys.first!, item[key]
                )
                
                result += key + ":" + serialize(value)
            }
        }
        
        stack.pop()
    }
    
    return result
}

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

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

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

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

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.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 {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try JSON(rawValue: string)
    catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    try JSON(dictionary)
    catch {
        throw ParsingError.internalError(Error())
    }

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.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 {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json: json, pretty: true)
    } catch {
        throw ParsingError.internalError(Error())
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string: string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func stringify(json: JSON) throws -> String {
    try {
        return JSONEncoder.

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

func encode(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json)
    } catch {
        throw ParsingError.invalidInput
    }
}

func decode(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

func serialize(json: JSON) throws -> String {
    try {
        return JSONSerializer.serialize(json)
    } catch {
        throw ParsingError.invalidInput
    }
}

func deserialize(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

func validate(json: JSON) throws {
    try {
        JSONValidator.validate(json)
    } catch {
        throw ParsingError.invalidInput
    }
}

```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 {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON encoder, returns custom error type in case of failures.
func encode(json: JSON) throws -> String {
    try {
        return JSONEncoder.encode(json)
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON decoder, returns custom error type in case of failures.
func decode(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    try {
        return JSONSerializer.serialize(json)
    } catch {
        throw ParsingError.invalidInput
    }
}

// JSON deserializer, returns custom error type in case of failures.
func deserialize(string: String) throws -> JSON {
    try {
        return JSON(JSONValue.init(JSONDecoder.decode(string)))
    } catch {
        throw ParsingError.invalidInput
    }
}

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

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

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

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

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

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

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

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

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

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

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

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

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

// JSON validator, returns custom error type in case of failures.
func validate(json: JSON)

typealias JSON = [String: Any]

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

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

func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

```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 result = try JSON(from: string)
    return result
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let result = try String(from: json, encoding: String.Encoding.utf8)
    return result
}

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

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

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 {
    var json: JSON = [:]
    var stack: [String: Int] = [:]
    var currentKey: String? = nil
    var currentObject: JSON = [:]
    var currentArray: [String: Any]? = nil
    var currentArrayIndex: Int? = nil
    var currentArrayIndexKey: String? = nil
    var currentArrayIndexValue: Any? = nil
    var currentArrayIndexValueKey: String? = nil
    var currentArrayIndexValueKeyIndex: Int? = nil
    var currentArrayIndexValueKeyIndexKey: String? = nil
    var currentArrayIndexValueKeyIndexValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValue: Any? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndexValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueValueKey: String? = nil
    var currentArrayIndexValueKeyIndex

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 error: ParsingError? = nil
    let result: JSON = try! JSON()
    let stack: [String: Any] = [String: Any]()
    let current: String? = nil
    let currentKey: String? = nil
    let currentKeyStack: [String] = []
    let currentKeyStackIndex: Int = 0
    let currentKeyStackLength: Int = 0
    let currentKeyStackLast: String? = nil
    let currentKeyStackLastIndex: Int = 0
    let currentKeyStackLastIndex2: Int = 0
    let currentKeyStackLastIndex3: Int = 0
    let currentKeyStackLastIndex4: Int = 0
    let currentKeyStackLastIndex5: Int = 0
    let currentKeyStackLastIndex6: Int = 0
    let currentKeyStackLastIndex7: Int = 0
    let currentKeyStackLastIndex8: Int = 0
    let currentKeyStackLastIndex9: Int = 0
    let currentKeyStackLastIndex10: Int = 0
    let currentKeyStackLastIndex11: Int = 0
    let currentKeyStackLastIndex12: Int = 0
    let currentKeyStackLastIndex13: Int = 0
    let currentKeyStackLastIndex14: Int = 0
    let currentKeyStackLastIndex15: Int = 0
    let currentKeyStackLastIndex16: Int = 0
    let currentKeyStackLastIndex17: Int = 0
    let currentKeyStackLastIndex18: Int = 0
    let currentKeyStackLastIndex19: Int = 0
    let currentKeyStackLastIndex20: Int = 0
    let currentKeyStackLastIndex21: Int = 0
    let currentKeyStackLastIndex22: Int = 0
    let currentKeyStackLastIndex23: Int = 0
    let currentKeyStackLastIndex24: Int = 0
    let currentKeyStackLastIndex25: Int = 0
    let currentKeyStackLastIndex26: Int = 0
    let currentKeyStackLastIndex27: Int = 0
    let currentKeyStackLastIndex28: Int = 0
    let currentKeyStackLastIndex29: Int = 0
    let currentKeyStackLastIndex30: Int = 0
    let currentKeyStackLastIndex31: Int = 0
    let currentKeyStackLastIndex32: Int = 0
    let currentKeyStackLastIndex33: Int = 0
    let currentKeyStackLastIndex34: Int = 0
    let currentKeyStackLastIndex35: Int = 0
    let currentKeyStackLastIndex36: Int = 0
    let currentKeyStackLastIndex37: Int = 0
    let currentKeyStackLastIndex38: Int = 0
    let currentKeyStackLastIndex39: Int = 0
    let currentKeyStackLastIndex40: Int = 0
    let currentKeyStackLastIndex41: Int = 0
    let currentKeyStackLastIndex42: Int = 0
    let currentKeyStackLastIndex43: Int = 0
    let currentKeyStackLastIndex44: Int = 0
    let currentKeyStackLastIndex45: Int = 0
    let currentKeyStackLastIndex46: Int = 0
    let currentKeyStackLastIndex47: Int = 0
    let currentKeyStackLastIndex48: Int = 0
    let currentKeyStackLastIndex49: Int = 0
    let currentKeyStackLastIndex50: Int = 0
    let currentKeyStackLastIndex51: Int = 0
    let currentKeyStackLastIndex52: Int = 0
    let currentKeyStackLastIndex53: Int = 0
    let currentKeyStackLastIndex54: Int = 0
    let currentKeyStackLastIndex55: Int = 0
    let currentKeyStackLastIndex56: Int = 0
    let currentKeyStackLastIndex57: Int = 0
    let currentKeyStackLastIndex58: Int = 0
    let currentKeyStackLastIndex59: Int = 0
    let currentKeyStackLastIndex60: Int = 0
    let currentKeyStackLastIndex61: Int = 0
    let currentKeyStackLastIndex62: Int = 

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(rawValue: string)
    return result
}

func parse(string: String, error: ParsingError) throws -> JSON {
    let result: JSON = try JSON(rawValue: string)
    return result
}

func parse(string: String, error: ParsingError, errorHandler: (ParsingError) -> Void) throws -> JSON {
    let result: JSON = try JSON(rawValue: string)
    return result
}

```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(rawValue: string)
    return result
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// JSON parser, returns custom error type in case of failures.
func parse(string: String, error: ParsingError,

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    var parser = Parser(string)
    var json = parser.parse()
    if parser.error != nil {
        throw ParsingError.internalError(parser.error)
    }
    return json
}

class Parser {
    var string: String
    var pos: Int = 0
    var error: Error? = nil

    init(string: String) {
        self.string = string
    }

    // Parse JSON string into JSON object.
    func parse() -> JSON {
        var json = self.parseObject()
        if self.pos < self.string.length {
            self.error = ParsingError.invalidInput
        }
        return json
    }

    // Parse JSON object.
    func parseObject() -> JSON {
        var json: JSON = {}
        self.expect('{')
        while self.peek != '}' {
            var key = self.parseString()
            self.expect(':')
            json[key] = self.parseValue()
            if self.peek == ',' {
                self.next()
            }
        }
        self.expect('}')
        return json
    }

    // Parse JSON array.
    func parseArray() -> [Any] {
        var array: [Any] = []
        self.expect('[')
        while self.peek != ']' {
            array.append(self.parseValue())
            if self.peek == ',' {
                self.next()
            }
        }
        self.expect(']')
        return array
    }

    // Parse JSON value.
    func parseValue() -> Any {
        var value: Any
        switch self.peek {
            case '[':
                value = self.parseArray()
            case '{':
                value = self.parseObject()
            case '"':
                value = self.parseString()
            case 't', 'f':
                value = self.parseBoolean()
            case 'n':
                value = self.parseNull()
            default:
                value = self.parseNumber()
        }
        return value
    }

    // Parse JSON string.
    func parseString() -> String {
        self.expect('"')
        var string = ""
        while self.peek != '"' {
            string += self.next()
        }
        self.expect('"')
        return string
    }

    // Parse JSON number.
    func parseNumber() -> Number {
        var number = ""
        while self.peek.isDigit {
            number += self.next()
        }
        if self.peek == '.' {
            number += self.next()
            while self.peek.isDigit {
                number += self.next()
            }
        }
        if self.peek == 'e' || self.peek == 'E' {
            number += self.next()
            if self.peek == '-' || self.peek == '+' {
                number += self.next()
            }
            while self.peek.isDigit {
                number += self.next()
            }
        }
        return Number(number)
    }

    // Parse JSON boolean.
    func parseBoolean() -> Bool {
        var boolean = self.next()
        if boolean == "true" {
            return true
        } else if boolean == "false" {
            return false
        } else {
            self.error = ParsingError.invalidInput
        }
    }

    // Parse JSON null.
    func parseNull() -> Any {
        self.next()
        return nil
    }

    // Expect next character to be c.
    func expect(c: String) {
        if self.peek != c {
            self.error = ParsingError.invalidInput
        }
        self.next()
    }

    // Get next character.
    func next() -> String {
        let c = self.string[self.pos]
        self.pos += 1
        return c
    }

    // Get next character without advancing position.
    func peek() -> String {
        return self.string[self.pos]
    }
}

```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 {
    var parser = Parser(string)
    var json = parser.parse()
    if parser.error != nil {
        throw ParsingError.internalError(parser.error)
    }
    return json
}

// Parser class, used to parse JSON string into JSON object.
class Parser {
    var string: String
    var pos: Int = 0
    var error: Error? = nil

    init(string: String) {
        self.string = string
    }

    // Parse JSON string into JSON object.
    func parse() -> JSON {
        var json = self.parseObject()
        if self.pos < self.string.length {
            self.error = ParsingError.invalidInput
        }
        return json
    }

    // Parse JSON object.
    func parseObject() -> JSON {
        var json: JSON = {}
        self.expect('{')
        while self.peek != '}' {
            var key = self.parseString()
            self.expect(':')
            json[key] = self.parseValue()
            if self.peek == ',' {
                self.next()
            }
        }
        self.expect('}')
        return json
    }

    // Parse JSON array.
    func parseArray() -> [Any] {
        var array: [Any] = []
        self.expect('[')
        while self.peek != ']' {
            array.append(self.parseValue())
            if self.peek == ',' {
                self.next()
            }
        }
        self.expect(']')
        return array
    }

    // Parse JSON value.
    func parseValue() -> Any {
        var value: Any
        switch self.peek {
            case '[':
                value = self.parseArray()
            case '{':
                value = self.parseObject()
            case '"':
                value = self.parseString()
            case 't', 'f':
                value = self.parseBoolean()
            case 'n':
                value = self.parseNull()
            default:
                value = self.parseNumber()
        }
        return value
    }

    // Parse JSON string.
    func parseString() -> String {
        self.expect('"')
        var string = ""
        while self.peek != '"' {
            string += self.next()
        }
        self.expect('"')
        return string
    }

    // Parse JSON number.
    func parseNumber() -> Number {
        var number = ""
        while self.peek.isDigit {
            number += self.next()
        }
        if self.peek == '.' {
            number += self.next()
            while self.peek.isDigit {
                number += self.next()
            }
        }
        if self.peek == 'e' || self.peek == 'E' {
            number += self.next()
            if self.peek == '-' || self.peek == '+' {
                number += self.next()
            }
            while self.peek.isDigit {
                number += self.next()
            }
        }
        return Number(number)
    }

    // Parse JSON boolean.
    func parseBoolean() -> Bool {
        var boolean = self.next()
        if boolean == "true" {
            return true
        } else if boolean == "false" {
            return false
        } else {
            self.error = ParsingError.invalidInput
        }
    }

    // Parse JSON null.
    func parseNull() -> Any {
        self.next()
        return nil
    }

    // Expect next character to be c.
    func expect(c: String) {
        if self.peek != c {
            self.error = ParsingError.invalidInput
        }
        self.next()
    }

    // Get next character.
    func next() -> String {
        let c = self.string[self.pos]
        self.pos += 1
        return c
    }

    // Get next character without advancing position.
    func peek() -> String {
        return self.string[self.pos]
    }
}

// Example usage:
let json = parse("""
    {
        "name": "John",
        "age": 30,
        "isMarried": true,
        "hobbies": ["reading", "swimming", "coding"],
        "address": {

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    let json = try! JSONSerialization.JSONObject(data: string, options: .parse)
    return json
}

func serialize(json: JSON) throws -> String {
    let string = try! JSONSerialization.data(
        JSONObject: json,
        options: .prettyPrinted,
        useEncoding: .utf8
    )
    return string
}

func isValid(string: String) throws -> Bool {
    let json = try! JSONSerialization.JSONObject(data: string, options: .parse)
    return json.isValid
}

func isValid(json: JSON) throws -> Bool {
    return json.isValid
}

func isValid(json: JSON, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

```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! JSONSerialization.JSONObject(data: string, options: .parse)
    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    let string = try! JSONSerialization.data(
        JSONObject: json,
        options: .prettyPrinted,
        useEncoding: .utf8
    )
    return string
}

// JSON validator, returns custom error type in case of failures.
func isValid(string: String) throws -> Bool {
    let json = try! JSONSerialization.JSONObject(data: string, options: .parse)
    return json.isValid
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON) throws -> Bool {
    return json.isValid
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String) throws -> Bool {
    if !json.isValid {
        return false
    } else {
        return true
    }
}

// JSON validator, returns custom error type in case of failures.
func isValid(json: JSON, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error: ParsingError, message: String, error

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

func generate(_ tree: HTMLNode) -> String {
    let mut result = String()
    let mut stack = [tree]
    loop {
        let node = stack.pop()
        match node {
            // Text node
            case HTMLNode.text(content) in
                result += content
            // Element node
            case HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.push(child)
                }
            // End of tree
            case nil in
                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 mut result = String()
    let mut stack = [tree]
    loop {
        let node = stack.pop()
        match node {
            // Text node
            case HTMLNode.text(content) in
                result += content
            // Element node
            case HTMLNode.element(name, attributes, children) in
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.push(child)
                }
            // End of tree
            case nil in
                return result
        }
    }
}

// Generate HTML tree
let tree = HTMLNode.element("div", [
    "class" => "container",
    "id" => "main"
], [
    HTMLNode.element("a", [
        "href" => "https://swifteval.com"
    ]),
    HTMLNode.element("h1", [
        "class" => "title"
    ], [
        HTMLNode.text("SwiftEval")
    ]),
    HTMLNode.element("p", [
        "class" => "subtitle"
    ], [
        HTMLNode.text("The Swift Programming Language")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("A language for Swift that allows you to write code that runs on iOS, macOS, tvOS, watchOS, and Swift on the web.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTMLNode.text("It's a language that's been around for a while, and it's been used for a long time.")
    ]),
    HTMLNode.element("p", [
        "class" => "description"
    ], [
        HTML

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]()
    stack.push(tree)
    while let node = stack.pop() {
        match node {
            case HTMLNode.text(_ content) => {
                result += content
            }
            case HTMLNode.element(_ name, _ attributes, _ children) => {
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        match node {
            case HTMLNode.text(_ content) => {
                result += content
            }
            case HTMLNode.element(_ name, _ attributes, _ children) => {
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        match node {
            case HTMLNode.text(_ content) => {
                result += content
            }
            case HTMLNode.element(_ name, _ attributes, _ children) => {
                result += "<$name"
                for (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]([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)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]([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)
                }
                result += "</" + name + ">"
        }
    }
    return result
}

// Generate HTML tree from predefined elements tree.
// Input with standart HTML like this "<div><a href="swifteval"></a></div>"
func parse(_ html: String) -> HTMLNode {
    var stack = [HTMLNode]([HTMLNode.element("body", [String : String]([
        "class" : "container"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "content"
    ])), HTMLNode.element("a", [String : String]([
        "href" : "https://swifteval.github.io"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div", [String : String]([
        "class" : "footer"
    ])), HTMLNode.element("div",

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
                let attributesString = attributes.map({ |(key, value)|
                    key + "=\"" + value + "\""
                }).join(" ")
                result += "<" + name + " " + attributesString + ">"
                for child in children {
                    stack.insertFirst(child)
                }
                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.popFirst() {
        match node {
            case HTMLNode.text(content) in
                result += content
            case HTMLNode.element(name, attributes, children) in
                let attributesString = attributes.map({ |(key, value)|
                    key + "=\"" + value + "\""
                }).join(" ")
                result += "<" + name + " " + attributesString + ">"
                for child in children {
                    stack.insertFirst(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        switch node {
            case let text(content) in
                result += "<text>" + content + "</text>"
            case let element(name, attributes, children) in
                result += "<" + name + ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        switch node {
            case let text(content) in
                result += "<text>" + content + "</text>"
            case let element(name, attributes, children) in
                result += "<" + name + ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        switch node {
            case let text(content) in
                result += "<text>" + content + "</text>"
            case let element(name, attributes, children) in
                result += "<" + name + ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        switch node {
            case let text(content) in
                result += "<text>" + content + "</text>"
            case let element(name, attributes, children) in
                result += "<" + name + ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        switch node {
            case let text(content) in
                result += "<text>" + content + "</text>"
            case let element(name, attributes, children) in
                result += "<" + name + ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        switch node {
            case let text(content) in
                result += "<text>" + content + "</text>"
            case let element(name, attributes, children) in
                result += "<" + name + ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        switch node {
            case let text(content) in
                result += "<text>" + content + "</text>"
            case let element(name, attributes, children) in
                result += "<" + name + ">"
                for child in children {
                    stack.push(child)
                }
                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 {
    var result = ""
    var

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

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

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

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

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

// Generate HTML tree from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval

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)
                }
                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.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)
                }
                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 mut output: String = ""
    let mut stack: [HTMLNode] = []
    let mut stack_index: Int = 0
    let mut stack_size: Int = 0
    
    // Push root node to stack.
    stack.append(at: tree)
    
    // Process stack.
    while stack_index < stack_size {
        let node: HTMLNode = stack[stack_index]
        stack_index += 1
        
        // Check if node is element.
        if let HTMLNode.element(name: _ name, attributes: _ attributes, children: _ children) = node {
            // Create HTML tag.
            output += "<" + name + ">"
            
            // Add attributes.
            for (key, value) in attributes {
                output += key + "=\"" + value + "\""
            }
            
            // Add children.
            for child in children {
                output += generate(child)
            }
            
            // Close tag.
            output += "</" + name + ">"
        } else if let HTMLNode.text(content: _ content) = node {
            // Add text.
            output += content
        }
        
        // Check if node is last child of stack.
        if stack_index == stack_size {
            // Add stack to output.
            stack_size = stack.count
            
            // Remove last element from stack.
            stack.remove(at: stack_size - 1)
        }
    }
    
    // Return output.
    return output
}

```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 mut output: String = ""
    let mut stack: [HTMLNode] = []
    let mut stack_index: Int = 0
    let mut stack_size: Int = 0
    
    // Push root node to stack.
    stack.append(at: tree)
    
    // Process stack.
    while stack_index < stack_size {
        let node: HTMLNode = stack[stack_index]
        stack_index += 1
        
        // Check if node is element.
        if let HTMLNode.element(name: _ name, attributes: _ attributes, children: _ children) = node {
            // Create HTML tag.
            output += "<" + name + ">"
            
            // Add attributes.
            for (key, value) in attributes {
                output += key + "=\"" + value + "\""
            }
            
            // Add children.
            for child in children {
                output += generate(child)
            }
            
            // Close tag.
            output += "</" + name + ">"
        } else if let HTMLNode.text(content: _ content) = node {
            // Add text.
            output += content
        }
        
        // Check if node is last child of stack.
        if stack_index == stack_size {
            // Add stack to output.
            stack_size = stack.count
            
            // Remove last element from stack.
            stack.remove(at: stack_size - 1)
        }
    }
    
    // Return output.
    return output
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let mut output: String = ""
    let mut stack: [HTMLNode] = []
    let mut stack_index: Int = 0
    let mut stack_size: Int = 0
    
    // Push root node to stack.
    stack.append(at: tree)
    
    // Process stack.
    while stack_index < stack_size {
        let node: HTMLNode = stack[stack_index]
        stack_index += 1
        
        // Check if node is element.
        if let HTMLNode.element(name: _ name, attributes: _ attributes, children: _ children) = node {
            // Create HTML tag.
            output += "<" + name + ">"
            
            // Add attributes.
            for (key, value) in attributes {
                output += key + "=\"" + value + "\""
            }
            
            // Add children.
            for child in children {
                output += generate(child)
            }
            
            // Close tag.
            output += "</" + name + ">"
        } else if let HTMLNode.text(content: _ content) = node {
            // Add text.
            output += content
        }
        
        // Check if node is last child of stack.
        if stack_index == stack_size {
            // Add stack to output.
            stack_size = stack.count
            
            // Remove last element from stack.
            stack.remove(at: stack_size - 1)
        }
    }
    
    // Return output.
    return output
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    let mut output: String = ""
    let mut stack: [HTMLNode] = []
    let mut stack_index: Int = 0
    let mut stack_size: Int = 0
    
    // Push root node to stack.
    stack.append(at: tree)
    
    // Process stack.
    while stack_index < stack_size {
        let node: HTMLNode = stack[stack_index]
        stack_index += 1
        
        // Check if node is element.
        if let HTMLNode.element(name: _ name, attributes: _ attributes, children: _ children) = node {
            // Create HTML tag.
            output += "<" + name + ">"
            
            // Add attributes.
            for (key, value) in attributes {
                output += key + "=\"" + value + "\""
            }
            
            // Add children.
            for child in children

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]()
    stack.push(tree)
    while let node = stack.pop() {
        if let elementNode = node as? HTMLNode.element {
            result += "<" + elementNode.name
            for (key, value) in elementNode.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in elementNode.children {
                stack.push(child)
            }
        } else if let textNode = node as? HTMLNode.text {
            result += textNode.content
        }
        result += "</" + node.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 {
    var result = ""
    var stack = [HTMLNode]()
    stack.push(tree)
    while let node = stack.pop() {
        if let elementNode = node as? HTMLNode.element {
            result += "<" + elementNode.name
            for (key, value) in elementNode.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in elementNode.children {
                stack.push(child)
            }
        } else if let textNode = node as? HTMLNode.text {
            result += textNode.content
        }
        result += "</" + node.name + ">"
    }
    return result
}

// Generate HTML tree 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]()
    stack.push(tree)
    while let node = stack.pop() {
        if let elementNode = node as? HTMLNode.element {
            result += "<" + elementNode.name
            for (key, value) in elementNode.attributes {
                result += " " + key + "=\"" + value + "\""
            }
            result += ">"
            for child in elementNode.children {
                stack.push(child)
            }
        } else if let textNode = node as? HTMLNode.text {
            result += textNode.content
        }
        result += "</" + node.name + ">"
    }
    return result
}
```

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

```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 (key, value) in attributes {
                    result += " $key=\"$value\""
                }
                result += ">"
                for child in children {
                    stack.insert(0, child)
                }
            }
        }
        return result
    }
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []Double()
    var token: String = ""
    var tokenType: TokenType = TokenType.Invalid
    var error: CalculateError? = nil
    for _, char in string.String(_string: string).enumerated() {
        if char.Character.isWhitespace {
            continue
        }
        if char.Character.isDigit {
            token += char.Character.string
            tokenType = TokenType.Number
        } else {
            tokenType = TokenType.Operator
            if token.isEmpty {
                error = CalculateError.invalidInput
                break
            }
            switch token {
                case "+":
                    stack.append(_stack.last + _stack.last)
                case "-":
                    stack.append(_stack.last - _stack.last)
                case "*":
                    stack.append(_stack.last * _stack.last)
                case "/":
                    stack.append(_stack.last / _stack.last)
                case "(":
                    continue
                case ")":
                    if stack.count == 0 {
                        error = CalculateError.invalidInput
                        break
                    }
                    stack.pop()
                default:
                    error = CalculateError.invalidInput
                    break
            }
            token = ""
        }
    }
    if token.isNotEmpty {
        switch tokenType {
            case TokenType.Number:
                stack.append(token.toDouble())
            case TokenType.Operator:
                error = CalculateError.invalidInput
        }
    }
    if error != nil {
        throw error
    }
    return stack.last
}

enum TokenType: String {
    case Number
    case 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] = []Double()
    var token: String = ""
    var tokenType: TokenType = TokenType.Invalid
    var error: CalculateError? = nil
    for _, char in string.String(_string: string).enumerated() {
        if char.Character.isWhitespace {
            continue
        }
        if char.Character.isDigit {
            token += char.Character.string
            tokenType = TokenType.Number
        } else {
            tokenType = TokenType.Operator
            if token.isEmpty {
                error = CalculateError.invalidInput
                break
            }
            switch token {
                case "+":
                    stack.append(_stack.last + _stack.last)
                case "-":
                    stack.append(_stack.last - _stack.last)
                case "*":
                    stack.append(_stack.last * _stack.last)
                case "/":
                    stack.append(_stack.last / _stack.last)
                case "(":
                    continue
                case ")":
                    if stack.count == 0 {
                        error = CalculateError.invalidInput
                        break
                    }
                    stack.pop()
                default:
                    error = CalculateError.invalidInput
                    break
            }
            token = ""
        }
    }
    if token.isNotEmpty {
        switch tokenType {
            case TokenType.Number:
                stack.append(token.toDouble())
            case TokenType.Operator:
                error = CalculateError.invalidInput
        }
    }
    if error != nil {
        throw error
    }
    return stack.last
}

enum TokenType: String {
    case Number
    case 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 tokens: [String] = []
    var currentToken: String = ""
    var currentOperator: String = ""
    var currentNumber: Double = 0.0
    var currentOperatorPriority: Int = 0
    var currentTokenPriority: Int = 0
    var currentTokenIsNumber: Bool = false
    var currentTokenIsOperator: Bool = false
    var currentTokenIsParenthesis: Bool = false
    var currentTokenIsParenthesisOpen: Bool = false
    var currentTokenIsParenthesisClose: Bool = false
    var currentTokenIsOperatorOpen: Bool = false
    var currentTokenIsOperatorClose: Bool = false
    var currentTokenIsOperatorPriority: Bool = false
    var currentTokenIsParenthesisPriority: Bool = false
    var currentTokenIsOperatorOpenPriority: Bool = false
    var currentTokenIsOperatorClosePriority: Bool = false
    var currentTokenIsNumberPriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpen: Bool = false
    var currentTokenIsNumberClose: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false
    var currentTokenIsNumberOpenPriority: Bool = false
    var currentTokenIsNumberClosePriority: Bool = false

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = tokenize(_string: string)
    return calculateTokens(_tokens: tokens)
}

func tokenize(_string: String) throws -> [String] {
    var tokens = [String]()
    var number = String()
    for _, c in _string.characters {
        if c.isDigit() {
            number += String(c)
        } else if c == '.' {
            number += String(c)
        } else if c == '(' || c == ')' || c == '+' || c == '-' || c == '*' || c == '/' {
            if number != String() {
                tokens.append(number)
                number = String()
            }
            tokens.append(String(c))
        }
    }
    if number != String() {
        tokens.append(number)
    }
    return tokens
}

func calculateTokens(_tokens: [String]) throws -> Double {
    var stack = [Double]()
    for _, token in _tokens {
        switch token {
            case "+", "-":
                var b = stack.pop()
                var a = stack.pop()
                stack.push(calculateBinaryOperation(a, b, token))
            case "*", "/":
                var b = stack.pop()
                var a = stack.pop()
                stack.push(calculateBinaryOperation(a, b, token))
            default:
                stack.push(Double(token))
        }
    }
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    return stack.pop()
}

func calculateBinaryOperation(_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 = tokenize(_string: string)
    return calculateTokens(_tokens: tokens)
}

// Tokenize a string into a list of tokens.
func tokenize(_string: String) throws -> [String] {
    var tokens = [String]()
    var number = String()
    for _, c in _string.characters {
        if c.isDigit() {
            number += String(c)
        } else if c == '.' {
            number += String(c)
        } else if c == '(' || c == ')' || c == '+' || c == '-' || c == '*' || c == '/' {
            if number != String() {
                tokens.append(number)
                number = String()
            }
            tokens.append(String(c))
        }
    }
    if number != String() {
        tokens.append(number)
    }
    return tokens
}

// Calculate tokens.
func calculateTokens(_tokens: [String]) throws -> Double {
    var stack = [Double]()
    for _, token in _tokens {
        switch token {
            case "+", "-":
                var b = stack.pop()
                var a = stack.pop()
                stack.push(calculateBinaryOperation(a, b, token))
            case "*", "/":
                var b = stack.pop()
                var a = stack.pop()
                stack.push(calculateBinaryOperation(a, b, token))
            default:
                stack.push(Double(token))
        }
    }
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    return stack.pop()
}

// Calculate a binary operation.
func calculateBinaryOperation(_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
    }
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = tokenize(_string: string)
    let result = calculateTokens(_tokens: tokens)
    return result
}

func calculateTokens(_tokens: [String]) throws -> Double {
    var result = 0.0
    var stack = [Double]()
    var operators = [String]("+-*/")
    var operatorsPriority = [Int]([0, 0, 1, 1, 1])
    var operatorsStack = [String]()
    var i = 0
    while i < count(_tokens) {
        var token = _tokens[i]
        if token.isNumeric() {
            var number = token.toDouble()
            stack.append(number)
        } else if operators.contains(token) {
            while operatorsStack.count > 0 && operatorsStack.last() in operators && operatorsPriority[operators.index(operatorsStack.last())] >= operatorsPriority[operators.index(token)] {
                var operator = operatorsStack.pop()!
                var secondOperand = stack.pop()!
                var firstOperand = stack.pop()!
                var result = performOperation(firstOperand, operator, secondOperand)
                stack.append(result)
            }
            operatorsStack.append(token)
        }
        i += 1
    }
    while operatorsStack.count > 0 {
        var operator = operatorsStack.pop()!
        var secondOperand = stack.pop()!
        var firstOperand = stack.pop()!
        var result = performOperation(firstOperand, operator, secondOperand)
        stack.append(result)
    }
    result = stack.first()!
    return result
}

func performOperation(_firstOperand: Double, _operator: String, _secondOperand: Double) throws -> Double {
    switch _operator {
        case "+":
            return _firstOperand + _secondOperand
        case "-":
            return _firstOperand - _secondOperand
        case "*":
            return _firstOperand * _secondOperand
        case "/":
            return _firstOperand / _secondOperand
        default:
            return 0.0
    }
}

func tokenize(_string: String) throws -> [String] {
    var tokens = [String]()
    var i = 0
    while i < count(_string) {
        var char = _string[i]
        if char.isWhitespace() {
            i += 1
            continue
        } else if char.isNumeric() {
            var token = ""
            while i < count(_string) && _string[i].isNumeric() {
                token += _string[i]
                i += 1
            }
            tokens.append(token)
        } else if char.isLetter() {
            var token = ""
            while i < count(_string) && _string[i].isLetter() {
                token += _string[i]
                i += 1
            }
            tokens.append(token)
        } else if char in ["\(", "\)", "\+", "\-", "\*", "\/"] {
            tokens.append(char.toString())
        } else {
            throw CalculateError.invalidInput
        }
        i += 1
    }
    return tokens
}

```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 = tokenize(_string: string)
    let result = calculateTokens(_tokens: tokens)
    return result
}

// Calculate tokens from readable string format.
func calculateTokens(_tokens: [String]) throws -> Double {
    var result = 0.0
    var stack = [Double]()
    var operators = [String]("+-*/")
    var operatorsPriority = [Int]([0, 0, 1, 1, 1])
    var operatorsStack = [String]()
    var i = 0
    while i < count(_tokens) {
        var token = _tokens[i]
        if token.isNumeric() {
            var number = token.toDouble()
            stack.append(number)
        } else if operators.contains(token) {
            while operatorsStack.count > 0 && operatorsStack.last() in operators && operatorsPriority[operators.index(operatorsStack.last())] >= operatorsPriority[operators.index(token)] {
                var operator = operatorsStack.pop()!
                var secondOperand = stack.pop()!
                var firstOperand = stack.pop()!
                var result = performOperation(firstOperand, operator, secondOperand)
                stack.append(result)
            }
            operatorsStack.append(token)
        }
        i += 1
    }
    while operatorsStack.count > 0 {
        var operator = operatorsStack.pop()!
        var secondOperand = stack.pop()!
        var firstOperand = stack.pop()!
        var result = performOperation(firstOperand, operator, secondOperand)
        stack.append(result)
    }
    result = stack.first()!
    return result
}

// Perform operation on two operands.
func performOperation(_firstOperand: Double, _operator: String, _secondOperand: Double) throws -> Double {
    switch _operator {
        case "+":
            return _firstOperand + _secondOperand
        case "-":
            return _firstOperand - _secondOperand
        case "*":
            return _firstOperand * _secondOperand
        case "/":
            return _firstOperand / _secondOperand
        default:
            return 0.0
    }
}

// Tokenize string into tokens.
func tokenize(_string: String) throws -> [String] {
    var tokens = [String]()
    var i = 0
    while i < count(_string) {
        var char = _string[i]
        if char.isWhitespace() {
            i += 1
            continue
        } else if char.isNumeric() {
            var token = ""
            while i < count(_string) && _string[i].isNumeric() {
                token += _string[i]
                i += 1
            }
            tokens.append(token)
        } else if char.isLetter() {
            var token = ""
            while i < count(_string) && _string[i].isLetter() {
                token += _string[i]
                i += 1
            }
            tokens.append(token)
        } else if char in ["\(", "\)", "\+", "\-", "\*", "\/"] {
            tokens.append(char.toString())
        } else {
            throw CalculateError.invalidInput
        }
        i += 1
    }
    return tokens
}

// Tokenize string into tokens.
func tokenize(_string: String) throws -> [String] {
    var tokens = [String]()
    var i = 0
    while i < count(_string) {
        var char = _string[i]
        if char.isWhitespace() {
            i += 1
            continue
        } else if char.isNumeric() {
            var token = ""
            while i < count(_string) && _string[i].isNumeric() {
                token += _string[i]
                i += 1
            }
            tokens.append(token)
        } else if char.isLetter() {
            var token = ""
            while i < count(_string) && _string[i].isLetter() {
                token += _string[i]
                i += 1
            }
            tokens.append(token)
        } else if char in ["\(", "\)", "\+", "\-", "\*", "\/"] {
            tokens.append(char.toString())
        } else {
            throw CalculateError.invalidInput
        }
        i += 1
    }

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = _
    tokens = tokens.replace(" ", "")
    if tokens.contains("(") {
        var count = 0
        var i = 0
        while i < tokens.count {
            if tokens[i] == "(" {
                count += 1
            } else if tokens[i] == ")" {
                count -= 1
            }
            if count == 0 {
                break
            }
            i += 1
        }
        tokens = tokens.substring(0, i) + tokens[i + 1..<tokens.count]
    }
    var stack = [Double]()
    var ops = [String]()
    for i in 0..<tokens.count {
        var token = tokens[i]
        if token.isDigit() {
            var num = 0.0
            while i < tokens.count && tokens[i].isDigit() {
                num = num * 10 + (tokens[i] - "0").rawValue
                i += 1
            }
            i -= 1
            stack.append(num)
        } else if token == "(" {
            ops.append(token)
        } else if token == ")" {
            while let op = ops.last {
                ops.removeLast()
                if op == "(" {
                    break
                }
                var right = stack.last!
                stack.removeLast()
                var left = stack.last!
                stack.removeLast()
                stack.append(doOperation(op, left, right))
            }
        } else {
            while let op = ops.last {
                if precedence(op) > precedence(token) {
                    break
                }
                ops.removeLast()
                var right = stack.last!
                stack.removeLast()
                var left = stack.last!
                stack.removeLast()
                stack.append(doOperation(op, left, right))
            }
            ops.append(token)
        }
    }
    while let op = ops.last {
        ops.removeLast()
        var right = stack.last!
        stack.removeLast()
        var left = stack.last!
        stack.removeLast()
        stack.append(doOperation(op, left, right))
    }
    return stack.first!
}

func doOperation(_ op: String, left: Double, right: Double) -> Double {
    switch op {
        case "+":
            return left + right
        case "-":
            return left - right
        case "*":
            return left * right
        case "/":
            if right == 0 {
                throw CalculateError.invalidInput
            }
            return left / right
    }
    return 0
}

func precedence(_ op: String) -> Int {
    switch op {
        case "+", "-":
            return 1
        case "*", "/":
            return 2
        default:
            return 0
    }
}

```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 = _
    tokens = tokens.replace(" ", "")
    if tokens.contains("(") {
        var count = 0
        var i = 0
        while i < tokens.count {
            if tokens[i] == "(" {
                count += 1
            } else if tokens[i] == ")" {
                count -= 1
            }
            if count == 0 {
                break
            }
            i += 1
        }
        tokens = tokens.substring(0, i) + tokens[i + 1..<tokens.count]
    }
    var stack = [Double]()
    var ops = [String]()
    for i in 0..<tokens.count {
        var token = tokens[i]
        if token.isDigit() {
            var num = 0.0
            while i < tokens.count && tokens[i].isDigit() {
                num = num * 10 + (tokens[i] - "0").rawValue
                i += 1
            }
            i -= 1
            stack.append(num)
        } else if token == "(" {
            ops.append(token)
        } else if token == ")" {
            while let op = ops.last {
                ops.removeLast()
                if op == "(" {
                    break
                }
                var right = stack.last!
                stack.removeLast()
                var left = stack.last!
                stack.removeLast()
                stack.append(doOperation(op, left, right))
            }
        } else {
            while let op = ops.last {
                if precedence(op) > precedence(token) {
                    break
                }
                ops.removeLast()
                var right = stack.last!
                stack.removeLast()
                var left = stack.last!
                stack.removeLast()
                stack.append(doOperation(op, left, right))
            }
            ops.append(token)
        }
    }
    while let op = ops.last {
        ops.removeLast()
        var right = stack.last!
        stack.removeLast()
        var left = stack.last!
        stack.removeLast()
        stack.append(doOperation(op, left, right))
    }
    return stack.first!
}

func doOperation(_ op: String, left: Double, right: Double) -> Double {
    switch op {
        case "+":
            return left + right
        case "-":
            return left - right
        case "*":
            return left * right
        case "/":
            if right == 0 {
                throw CalculateError.invalidInput
            }
            return left / right
    }
    return 0
}

func precedence(_ op: String) -> Int {
    switch op {
        case "+", "-":
            return 1
        case "*", "/":
            return 2
        default:
            return 0
    }
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = stringSplit(string: _).map(func(token: String) -> Double? {
        switch token {
            case "+", "-", "*", "/":
                return Double(token)
            case "(":
                return calculate(_: token)
            case ")":
                return nil
            default:
                return Double(token)
        }
    })
    
    return calculateTokens(tokens: tokens)
}

func calculateTokens(_ tokens: [Double?]) throws -> Double {
    var stack = [Double]()
    
    for _, token in tokens {
        if token == nil {
            var right = stack.pop()
            var left = stack.pop()
            
            if left == nil || right == nil {
                throw CalculateError.invalidInput
            }
            
            switch token {
                case "+":
                    stack.push(left + right)
                case "-":
                    stack.push(left - right)
                case "*":
                    stack.push(left * right)
                case "/":
                    stack.push(left / right)
                default:
                    throw CalculateError.invalidInput
            }
        } else {
            stack.push(token)
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.pop()!
}

func stringSplit(_ string: String) -> [String] {
    var tokens = [String]()
    var buffer = ""
    var isNumber = false
    
    for _, character in string(_):
        if character.isDigit() {
            buffer += character
            isNumber = true
        } else {
            if isNumber {
                tokens.append(buffer)
                buffer = ""
                isNumber = false
            }
            
            tokens.append(character)
        }
    }
    
    if isNumber {
        tokens.append(buffer)
    }
    
    return tokens
}

```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 = stringSplit(string: _).map(func(token: String) -> Double? {
        switch token {
            case "+", "-", "*", "/":
                return Double(token)
            case "(":
                return calculate(_: token)
            case ")":
                return nil
            default:
                return Double(token)
        }
    })
    
    return calculateTokens(tokens: tokens)
}

func calculateTokens(_ tokens: [Double?]) throws -> Double {
    var stack = [Double]()
    
    for _, token in tokens {
        if token == nil {
            var right = stack.pop()
            var left = stack.pop()
            
            if left == nil || right == nil {
                throw CalculateError.invalidInput
            }
            
            switch token {
                case "+":
                    stack.push(left + right)
                case "-":
                    stack.push(left - right)
                case "*":
                    stack.push(left * right)
                case "/":
                    stack.push(left / right)
                default:
                    throw CalculateError.invalidInput
            }
        } else {
            stack.push(token)
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.pop()!
}

func stringSplit(_ string: String) -> [String] {
    var tokens = [String]()
    var buffer = ""
    var isNumber = false
    
    for _, character in string(_):
        if character.isDigit() {
            buffer += character
            isNumber = true
        } else {
            if isNumber {
                tokens.append(buffer)
                buffer = ""
                isNumber = false
            }
            
            tokens.append(character)
        }
    }
    
    if isNumber {
        tokens.append(buffer)
    }
    
    return tokens
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []
    var operator: String = ""
    var number: Double = 0.0
    var isNumber: Bool = false
    var isOperator: Bool = false
    var isParenthesis: Bool = false
    var isNumberString: Bool = false
    
    for _, c in string: c in string {
        switch c {
            case " ":
                continue
            case "(":
                isParenthesis = true
                continue
            case ")":
                isParenthesis = false
                continue
            case "+", "-", "*", "/":
                if isNumberString {
                    stack.append(number)
                    isNumberString = false
                }
                operator = c
                isOperator = true
                continue
            case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9":
                if isParenthesis {
                    isNumberString = true
                    continue
                }
                if isNumberString {
                    stack.append(number)
                    isNumberString = false
                }
                number = number * 10 + (c - "0")
                isNumber = true
                continue
        }
        
        if isNumber {
            stack.append(number)
            isNumber = false
        }
        if isOperator {
            switch operator {
                case "+":
                    number = stack.pop() + stack.pop()
                case "-":
                    number = stack.pop() - stack.pop()
                case "*":
                    number = stack.pop() * stack.pop()
                case "/":
                    number = stack.pop() / stack.pop()
            }
            stack.append(number)
            isOperator = false
        }
    }
    
    if isNumberString {
        stack.append(number)
    }
    if isOperator {
        switch operator {
            case "+":
                number = stack.pop() + stack.pop()
            case "-":
                number = stack.pop() - stack.pop()
            case "*":
                number = stack.pop() * stack.pop()
            case "/":
                number = stack.pop() / stack.pop()
        }
        stack.append(number)
    }
    
    if stack.count == 1 {
        return stack.pop()
    } else {
        return 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 stack: [Double] = []
    var operator: String = ""
    var number: Double = 0.0
    var isNumber: Bool = false
    var isOperator: Bool = false
    var isParenthesis: Bool = false
    var isNumberString: Bool = false
    
    for _, c in string: c in string {
        switch c {
            case " ":
                continue
            case "(":
                isParenthesis = true
                continue
            case ")":
                isParenthesis = false
                continue
            case "+", "-", "*", "/":
                if isNumberString {
                    stack.append(number)
                    isNumberString = false
                }
                operator = c
                isOperator = true
                continue
            case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9":
                if isParenthesis {
                    isNumberString = true
                    continue
                }
                if isNumberString {
                    stack.append(number)
                    isNumberString = false
                }
                number = number * 10 + (c - "0")
                isNumber = true
                continue
        }
        
        if isNumber {
            stack.append(number)
            isNumber = false
        }
        if isOperator {
            switch operator {
                case "+":
                    number = stack.pop() + stack.pop()
                case "-":
                    number = stack.pop() - stack.pop()
                case "*":
                    number = stack.pop() * stack.pop()
                case "/":
                    number = stack.pop() / stack.pop()
            }
            stack.append(number)
            isOperator = false
        }
    }
    
    if isNumberString {
        stack.append(number)
    }
    if isOperator {
        switch operator {
            case "+":
                number = stack.pop() + stack.pop()
            case "-":
                number = stack.pop() - stack.pop()
            case "*":
                number = stack.pop() * stack.pop()
            case "/":
                number = stack.pop() / stack.pop()
        }
        stack.append(number)
    }
    
    if stack.count == 1 {
        return stack.pop()
    } else {
        return NaN
    }
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate2(_ string: String) throws -> Double {
    var stack: [Double] = []
    var operator: String = ""
    var number: Double = 0.0
    var isNumber: Bool = false
    var isOperator: Bool = false
    var isParenthesis: Bool = false
    var isNumberString: Bool = false
    
    for _, c in string: c in string {
        switch c {
            case " ":
                continue
            case "(":
                isParenthesis = true
                continue
            case ")":
                isParenthesis = false
                continue
            case "+", "-", "*", "/":
                if isNumberString {
                    stack.append(number)
                    isNumberString = false
                }
                operator = c
                isOperator = true
                continue
            case "0", "1", "2", "3", "4", "5", "6", "7", "8", "9":
                if isParenthesis {
                    isNumberString = true
                    continue
                }
                if isNumberString {
                    stack.append(number)
                    isNumberString = false
                }
                number = number * 10 + (c - "0")
                isNumber = true
                continue
        }
        
        if isNumber {
            stack.append(number)
            isNumber = false
        }
        if isOperator {
            switch operator {
                case "+":
                    number = stack.pop() + stack.pop()
                case "-":
                    number = stack.pop() - stack.pop()
                case "*":
                    number = stack.pop() * stack.pop()
                case "/":
                    number = stack.pop() / stack.pop()
            }
            stack.append(number)
            isOperator = false
        }
    }
    
    if isNumberString {
        stack.append(number)
    }
    

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = split(string: _, on: " ")
    if tokens.count <= 0 {
        return 0
    }
    
    var stack = ArrayDeque<Double>()
    var operatorStack = ArrayDeque<String>()
    
    for token in tokens {
        if let number = token.decimalNumber {
            stack.add(number)
        } else if let operator = token {
            if operator == "(" {
                operatorStack.add(operator)
            } else if operator == ")" {
                while let top = operatorStack.last {
                    if top != "(" {
                        var right = stack.removeLast()
                        var left = stack.removeLast()
                        stack.add(calculate(left, operator, right))
                    } else {
                        operatorStack.removeLast()
                    }
                }
            } else {
                while let top = operatorStack.last {
                    if let higherPrecedence = precedence(operator) {
                        if let lowerPrecedence = precedence(top) {
                            if higherPrecedence <= lowerPrecedence {
                                var right = stack.removeLast()
                                var left = stack.removeLast()
                                stack.add(calculate(left, top, right))
                            }
                        } else {
                            break
                        }
                    } else {
                        break
                    }
                }
                operatorStack.add(operator)
            }
        }
    }
    
    while let top = operatorStack.last {
        var right = stack.removeLast()
        var left = stack.removeLast()
        stack.add(calculate(left, top, right))
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first
}

func precedence(_ string: String) -> Int {
    switch _ {
        case "+", "-":
            return 1
        case "*", "/":
            return 2
        default:
            return 0
    }
}

func calculate(_ left: Double, _ operator: String, _ right: Double) -> Double {
    switch operator {
        case "+":
            return left + right
        case "-":
            return left - right
        case "*":
            return left * right
        case "/":
            return left / right
        default:
            return 0
    }
}

func split(_ string: String, on: String) -> [String: Int] {
    var result = [String: Int]()
    var index = 0
    var length = string.length
    
    while index < length {
        var start = index
        while index < length && !string(at: index).matches(on) {
            index += 1
        }
        result[string(from: start, to: index)] = index - start
        index += 1
    }
    
    return result
}

func main() {
    print(calculate("1+2*3"))
}

```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(string: _, on: " ")
    if tokens.count <= 0 {
        return 0
    }
    
    var stack = ArrayDeque<Double>()
    var operatorStack = ArrayDeque<String>()
    
    for token in tokens {
        if let number = token.decimalNumber {
            stack.add(number)
        } else if let operator = token {
            if operator == "(" {
                operatorStack.add(operator)
            } else if operator == ")" {
                while let top = operatorStack.last {
                    if top != "(" {
                        var right = stack.removeLast()
                        var left = stack.removeLast()
                        stack.add(calculate(left, operator, right))
                    } else {
                        operatorStack.removeLast()
                    }
                }
            } else {
                while let top = operatorStack.last {
                    if let higherPrecedence = precedence(operator) {
                        if let lowerPrecedence = precedence(top) {
                            if higherPrecedence <= lowerPrecedence {
                                var right = stack.removeLast()
                                var left = stack.removeLast()
                                stack.add(calculate(left, top, right))
                            }
                        } else {
                            break
                        }
                    } else {
                        break
                    }
                }
                operatorStack.add(operator)
            }
        }
    }
    
    while let top = operatorStack.last {
        var right = stack.removeLast()
        var left = stack.removeLast()
        stack.add(calculate(left, top, right))
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first
}

func precedence(_ string: String) -> Int {
    switch _ {
        case "+", "-":
            return 1
        case "*", "/":
            return 2
        default:
            return 0
    }
}

func calculate(_ left: Double, _ operator: String, _ right: Double) -> Double {
    switch operator {
        case "+":
            return left + right
        case "-":
            return left - right
        case "*":
            return left * right
        case "/":
            return left / right
        default:
            return 0
    }
}

func split(_ string: String, on: String) -> [String: Int] {
    var result = [String: Int]()
    var index = 0
    var length = string.length
    
    while index < length {
        var start = index
        while index < length && !string(at: index).matches(on) {
            index += 1
        }
        result[string(from: start, to: index)] = index - start
        index += 1
    }
    
    return result
}

func main() {
    print(calculate("1+2*3"))
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = split(string: _, on: " ")
    
    var stack = ArrayDeque<Double>()
    var operators = ArrayDeque<String>()
    
    for token in tokens {
        if token.isDigit() {
            stack.push(Double(token))
        } else {
            if operators.isEmpty() {
                operators.push(token)
            } else {
                if token == "(" {
                    operators.push(token)
                } else if token == ")" {
                    while let operator = operators.pop() {
                        if operator == "(" {
                            break
                        } else {
                            var right = stack.pop()
                            var left = stack.pop()
                            stack.push(apply(operator, left, right))
                        }
                    }
                } else {
                    while let operator = operators.last() {
                        if operator == "(" {
                            operators.push(token)
                            break
                        } else if precedence(token) > precedence(operator) {
                            operators.push(token)
                            break
                        } else {
                            var right = stack.pop()
                            var left = stack.pop()
                            stack.push(apply(operator, left, right))
                        }
                    }
                }
            }
        }
    }
    
    while let operator = operators.pop() {
        var right = stack.pop()
        var left = stack.pop()
        stack.push(apply(operator, left, right))
    }
    
    return stack.pop() ?? 0
}

func apply(_ operator: String, _ left: Double, _ right: Double) -> Double {
    switch operator {
        case "+":
            return left + right
        case "-":
            return left - right
        case "*":
            return left * right
        case "/":
            return left / right
    }
    
    return 0
}

func precedence(_ operator: String) -> Int {
    switch operator {
        case "+", "-":
            return 1
        case "*", "/":
            return 2
        default:
            return 0
    }
}

func split(_ string: String, on: String) -> [String] {
    var result = [String]()
    var start = 0
    var end = 0
    
    for end in 0..<string.length {
        if string[end] == on {
            result.append(string[start..end - 1])
            start = end + 1
        }
    }
    
    result.append(string[start..end])
    
    return result
}

```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(string: _, on: " ")
    
    var stack = ArrayDeque<Double>()
    var operators = ArrayDeque<String>()
    
    for token in tokens {
        if token.isDigit() {
            stack.push(Double(token))
        } else {
            if operators.isEmpty() {
                operators.push(token)
            } else {
                if token == "(" {
                    operators.push(token)
                } else if token == ")" {
                    while let operator = operators.pop() {
                        if operator == "(" {
                            break
                        } else {
                            var right = stack.pop()
                            var left = stack.pop()
                            stack.push(apply(operator, left, right))
                        }
                    }
                } else {
                    while let operator = operators.last() {
                        if operator == "(" {
                            operators.push(token)
                            break
                        } else if precedence(token) > precedence(operator) {
                            operators.push(token)
                            break
                        } else {
                            var right = stack.pop()
                            var left = stack.pop()
                            stack.push(apply(operator, left, right))
                        }
                    }
                }
            }
        }
    }
    
    while let operator = operators.pop() {
        var right = stack.pop()
        var left = stack.pop()
        stack.push(apply(operator, left, right))
    }
    
    return stack.pop() ?? 0
}

// Apply operator on two numbers.
func apply(_ operator: String, _ left: Double, _ right: Double) -> Double {
    switch operator {
        case "+":
            return left + right
        case "-":
            return left - right
        case "*":
            return left * right
        case "/":
            return left / right
    }
    
    return 0
}

// Return precedence of operator.
func precedence(_ operator: String) -> Int {
    switch operator {
        case "+", "-":
            return 1
        case "*", "/":
            return 2
        default:
            return 0
    }
}

// Split string by delimiter.
func split(_ string: String, on: String) -> [String] {
    var result = [String]()
    var start = 0
    var end = 0
    
    for end in 0..<string.length {
        if string[end] == on {
            result.append(string[start..end - 1])
            start = end + 1
        }
    }
    
    result.append(string[start..end])
    
    return result
}
```

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack: [Double] = []Double()
    var token: String = ""
    var tokenType: TokenType = TokenType.Invalid
    for _, c in string(_):
        tokenType = tokenTypeFromChar(c)
        switch tokenType {
            case TokenType.Number:
                token += c
            case TokenType.Operator:
                if token != "" {
                    stack.append(token.toDouble())
                    token = ""
                }
                stack.append(token.toDouble())
                stack.append(c)
            case TokenType.LeftParen:
                stack.append(c)
            case TokenType.RightParen:
                if token != "" {
                    stack.append(token.toDouble())
                    token = ""
                }
                var top = stack.pop()
                while top != TokenType.LeftParen {
                    if top == TokenType.Invalid {
                        throw CalculateError.invalidInput
                    }
                    var a = stack.pop()
                    var b = stack.pop()
                    var result = calculate(b, a, top)
                    stack.append(result)
                    top = stack.pop()
                }
            default:
                throw CalculateError.invalidInput
        }
    }
    if token != "" {
        stack.append(token.toDouble())
    }
    var result = stack.pop()
    if stack.count > 0 {
        throw CalculateError.invalidInput
    }
    return result
}

func tokenTypeFromChar(c: Char) TokenType {
    switch c {
        case '+':
        case '-':
        case '*':
        case '/':
        case '(':
        case ')':
            return TokenType(c)
        default:
            if c.isDecimalDigit() {
                return TokenType.Number
            }
            return TokenType.Invalid
    }
}

func calculate(a: Double, b: Double, op: Char) throws -> Double {
    switch op {
        case '+':
            return a + b
        case '-':
            return a - b
        case '*':
            return a * b
        case '/':
            return a / b
        default:
            throw CalculateError.invalidInput
    }
}

enum TokenType: Character {
    case Number
    case Operator
    case LeftParen
    case RightParen
    case Invalid
}

```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] = []Double()
    var token: String = ""
    var tokenType: TokenType = TokenType.Invalid
    for _, c in string(_):
        tokenType = tokenTypeFromChar(c)
        switch tokenType {
            case TokenType.Number:
                token += c
            case TokenType.Operator:
                if token != "" {
                    stack.append(token.toDouble())
                    token = ""
                }
                stack.append(token.toDouble())
                stack.append(c)
            case TokenType.LeftParen:
                stack.append(c)
            case TokenType.RightParen:
                if token != "" {
                    stack.append(token.toDouble())
                    token = ""
                }
                var top = stack.pop()
                while top != TokenType.LeftParen {
                    if top == TokenType.Invalid {
                        throw CalculateError.invalidInput
                    }
                    var a = stack.pop()
                    var b = stack.pop()
                    var result = calculate(b, a, top)
                    stack.append(result)
                    top = stack.pop()
                }
            default:
                throw CalculateError.invalidInput
        }
    }
    if token != "" {
        stack.append(token.toDouble())
    }
    var result = stack.pop()
    if stack.count > 0 {
        throw CalculateError.invalidInput
    }
    return result
}

func tokenTypeFromChar(c: Char) TokenType {
    switch c {
        case '+':
        case '-':
        case '*':
        case '/':
        case '(':
        case ')':
            return TokenType(c)
        default:
            if c.isDecimalDigit() {
                return TokenType.Number
            }
            return TokenType.Invalid
    }
}

func calculate(a: Double, b: Double, op: Char) throws -> Double {
    switch op {
        case '+':
            return a + b
        case '-':
            return a - b
        case '*':
            return a * b
        case '/':
            return a / b
        default:
            throw CalculateError.invalidInput
    }
}

enum TokenType: Character {
    case Number
    case Operator
    case LeftParen
    case RightParen
    case Invalid
}

```

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// Function to execute a binary

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

// Function to execute a binary with arguments and return its exit code.
func executeWithExitCode(binary: String, arguments: [String]) ->

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String], input: String, output: String, errorOutput: String, inputFile: String) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment, stdin: input, stdout: output, stderr: errorOutput, stdinFile: inputFile)
    let stdout = command.standardOutputString()
    let stderr = command.standardErrorString()
    return (stdout, stderr)
}

func execute(binary: String, arguments: [String], workingDirectory: String, environment: [String], input: String, output: String, errorOutput: String, inputFile: String, outputFile: String) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment, stdin: input, stdout: output, stderr: errorOutput, stdinFile: inputFile, stdoutFile: outputFile)
    let stdout = command.standardOutputString()
    let stderr = command.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 command = Process(argv: arguments)
    let stdout = command.standardOutputString()
    let stderr = command.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 command = Process(argv: arguments, cwd: workingDirectory)
    let stdout = command.standardOutputString()
    let stderr = command.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 command = Process(argv: arguments, environment: environment)
    let stdout = command.standardOutputString()
    let stderr = command.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, environment: [String]) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment)
    let stdout = command.standardOutputString()
    let stderr = command.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, environment: [String], input: String) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment, stdin: input)
    let stdout = command.standardOutputString()
    let stderr = command.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, environment: [String], input: String, output: String) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment, stdin: input, stdout: output)
    let stdout = command.standardOutputString()
    let stderr = command.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, environment: [String], input: String, output: String, errorOutput: String) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment, stdin: input, stdout: output, stderr: errorOutput)
    let stdout = command.standardOutputString()
    let stderr = command.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, environment: [String], input: String, output: String, errorOutput: String, inputFile: String) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment, stdin: input, stdout: output, stderr: errorOutput, stdinFile: inputFile)
    let stdout = command.standardOutputString()
    let stderr = command.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, environment: [String], input: String, output: String, errorOutput: String, inputFile: String, outputFile: String) -> (String, String) {
    let command = Process(argv: arguments, cwd: workingDirectory, environment: environment, stdin: input, stdout: output, stderr: errorOutput, stdinFile: inputFile, stdoutFile: outputFile)
    let stdout = command.standardOutputString()
    let stderr = command.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]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.standardErrorString()
    return (stdout, stderr)
}

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

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

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

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

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

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

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

func execute(binary: String, arguments: [String], timeout: Int, arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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 command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String], arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String], arguments: [String], arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process(argv: [binary, arguments])
    let stdout = command.standardOutputString()
    let stderr = command.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], timeout: Int, arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String], arguments: [String]) -> (String, String) {
    let command = Process

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)
    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 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.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.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.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.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.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.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.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.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.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.launch()
    let stdout = process.standardOutputString()
    let stderr = process.standardErrorString()
    return (stdout, stderr)
}

// Function to execute binary with arguments and capture

func execute(binary: String, arguments: [String]) -> (String, String) {
    let process = Process(argv: arguments)
    let stdout = ""
    let stderr = ""
    process.launch()
    process.standardOutput?.read(to: &stdout)
    process.standardError?.read(to: &stderr)
    return (stdout, stderr)
}

func executeAndReturnStdout(binary: String, arguments: [String]) -> String {
    let (stdout, _) = execute(binary, arguments)
    return stdout
}

func executeAndReturnStderr(binary: String, arguments: [String]) -> String {
    _, (stderr, _) = execute(binary, arguments)
    return stderr
}

func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    return execute(binary, arguments)
}

func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    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 = ""
    let stderr = ""
    process.launch()
    process.standardOutput?.read(to: &stdout)
    process.standardError?.read(to: &stderr)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout.
func executeAndReturnStdout(binary: String, arguments: [String]) -> String {
    let (stdout, _) = execute(binary, arguments)
    return stdout
}

// Function to execute binary with arguments and return stderr.
func executeAndReturnStderr(binary: String, arguments: [String]) -> String {
    _, (stderr, _) = execute(binary, arguments)
    return stderr
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    return execute(binary, arguments)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String, String) {
    let (stdout, stderr) = execute(binary, arguments)
    return (stdout, stderr)
}

// Function to execute binary with arguments and return stdout and stderr.
func executeAndReturnStdoutAndStderr(binary: String, arguments: [String]) -> (String,

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, inputEncoding: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, inputEncoding: inputEncoding)
    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, inputEncoding: String, outputEncoding: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, inputEncoding: inputEncoding, outputEncoding: outputEncoding)
    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, inputEncoding: String, outputEncoding: String, errorEncoding: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, inputEncoding: inputEncoding, outputEncoding: outputEncoding, errorEncoding: errorEncoding)
    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, inputEncoding: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, inputEncoding: inputEncoding)
    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, inputEncoding: String, outputEncoding: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, inputEncoding: inputEncoding, outputEncoding: outputEncoding)
    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, inputEncoding: String, outputEncoding: String, errorEncoding: String) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, inputEncoding: inputEncoding, outputEncoding: outputEncoding, errorEncoding: errorEncoding)
    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, inputEncoding: String, outputEncoding: String, errorEncoding: String, timeout: Int) -> (String, String) {
    let process = Process(argv: arguments, standardInput: input, standardOutput: output, standardError: error, timeout: timeout, inputEncoding: inputEncoding, outputEncoding: output

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 result = function(key)
            cache[key] = result
            result
        }
    }
}

func factorial(n: Int) -> Int {
    let memoizedFactorial = memoize(func(n: Int) -> Int {
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    memoizedFactorial(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 result = function(key)
            cache[key] = result
            result
        }
    }
}

// Function to compute the factorial of a number using memoization.
func factorial(n: Int) -> Int {
    let memoizedFactorial = memoize(func(n: Int) -> Int {
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    memoizedFactorial(n)
}

// Example usage:
let result = factorial(10)
print(result) // Output: 3628800
```

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

func factorial(n: Int) -> Int {
    let memoizedFactorial = memoize(function: { n in
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    memoizedFactorial(n)
}

func main() {
    let n = 10
    let result = factorial(n)
    print("The factorial 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 {
    var cache = Map<T, U>()
    return { input: input in
        if cache.contains(input) {
            cache[input]
        } else {
            let result = function(input)
            cache[input] = result
            result
        }
    }
}

// Function that calculates the factorial of a number using memoization.
func factorial(n: Int) -> Int {
    let memoizedFactorial = memoize(function: { n in
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    memoizedFactorial(n)
}

// Test the memoized factorial function.
func main() {
    let n = 10
    let result = factorial(n)
    print("The factorial of \(n) is \(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
        }
    }
}

```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
        }
    }
}

// Example usage:
let expensiveFunction = memoize(func(x: Int) -> Int {
    // Simulate an expensive computation.
    return x * x
})

let result1 = expensiveFunction(5)
let result2 = expensiveFunction(5)

print(result1) // Output: 25
print(result2) // Output: 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 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 {
    let cache = Map<T, U>()
    return { key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}

// Example usage:
let expensiveFunction = { key in
    // Simulate an expensive computation that takes a long time.
    print("Computing expensive value for key: \(key)")
    sleep(1)
    key.uppercase()
}

let memoizedFunction = memoize(expensiveFunction)

// Call the memoized function with different keys.
let key1 = "apple"
let key2 = "banana"

print("Memoized function result for key \(key1): \(memoizedFunction(key1))")
print("Memoized function result for key \(key2): \(memoizedFunction(key2))")
```

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 result = function(key)
            cache[key] = result
            result
        }
    }
}

func factorial(_ n: Int) -> Int {
    let memoizedFactorial = memoize(func(n: Int) -> Int {
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    memoizedFactorial(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
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Function to calculate the factorial of a number using memoization.
func factorial(_ n: Int) -> Int {
    let memoizedFactorial = memoize(func(n: Int) -> Int {
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    memoizedFactorial(n)
}

// Example usage:
let result = factorial(5)
print(result) // Output: 120
```

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

func factorial(n: Int) -> Int {
  if n <= 1 {
    return 1
  } else {
    return n * factorial(n - 1)
  }
}

```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 cachedValue = cache[key]
    if cachedValue != nil {
      cachedValue
    } else {
      let result = function(key)
      cache[key] = result
      result
    }
  }
}

// A function that calculates the factorial of a given number.
func factorial(n: Int) -> Int {
  if n <= 1 {
    return 1
  } else {
    return n * factorial(n - 1)
  }
}

// A memoized version of the factorial function.
let memoizedFactorial = memoize(factorial)

// Example usage:
let result = memoizedFactorial(5)
print(result) // Output: 120
```

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

func factorial(n: Int) -> Int {
    let memoizedFactorial = memoize(func(n: Int) -> Int {
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    return memoizedFactorial(n)
}

func main() {
    let result = factorial(10)
    print("The factorial of 10 is: \(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 { key in
        if let value = cache[key] {
            value
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Function to compute the factorial of a number using memoization.
func factorial(n: Int) -> Int {
    let memoizedFactorial = memoize(func(n: Int) -> Int {
        if n <= 1 {
            1
        } else {
            n * factorial(n - 1)
        }
    })
    return memoizedFactorial(n)
}

// Test the memoized factorial function.
func main() {
    let result = factorial(10)
    print("The factorial of 10 is: \(result)")
}
```

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 fibonacci(_ n: Int) -> Int {
    let memoizedFibonacci = memoize(self.memoizedFibonacci)
    return memoizedFibonacci(n)
}

func (self) memoizedFibonacci(_ n: Int) -> Int {
    if n <= 1 {
        return n
    }
    return self.memoizedFibonacci(n - 1) + self.memoizedFibonacci(n - 2)
}

func main() {
    let n = 10
    let result = fibonacci(n)
    print("Fibonacci($n) = $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
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let value = function(key)
            cache[key] = value
            value
        }
    }
}

// Fibonacci sequence generator using memoization.
func fibonacci(_ n: Int) -> Int {
    let memoizedFibonacci = memoize(self.memoizedFibonacci)
    return memoizedFibonacci(n)
}

// Memoized Fibonacci sequence generator.
func (self) memoizedFibonacci(_ n: Int) -> Int {
    if n <= 1 {
        return n
    }
    return self.memoizedFibonacci(n - 1) + self.memoizedFibonacci(n - 2)
}

// Test the memoized Fibonacci sequence generator.
func main() {
    let n = 10
    let result = fibonacci(n)
    print("Fibonacci($n) = $result")
}
```

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: Map<T, U> = Map()
    return { key: key in
        if let cachedValue = cache[key] {
            cachedValue
        } 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> = Map()
    return { key: key in
        if let cachedValue = cache[key] {
            cachedValue
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}
// Example usage:
let expensiveFunction: @escaping (Int) -> Int = { x in x * x }
let memoizedFunction = memoize(expensiveFunction)

// Call the memoized function with the same argument to retrieve the cached result.
let result1 = memoizedFunction(5)
let result2 = memoizedFunction(5)

// Check if the results are the same.
print(result1 == result2) // Output: true
```

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

func factorial(n: Int) -> Int {
    if n == 0 {
        return 1
    } else {
        return n * factorial(n - 1)
    }
}

func fibonacci(n: Int) -> Int {
    if n == 0 {
        return 0
    } else if n == 1 {
        return 1
    } else {
        return fibonacci(n - 1) + fibonacci(n - 2)
    }
}

func sumOfDigits(n: Int) -> Int {
    if n == 0 {
        return 0
    } else {
        return (n % 10) + sumOfDigits(n / 10)
    }
}

func isPalindrome(n: Int) -> Bool {
    return n == reverse(n)
}

func power(base: Float, exponent: Int) -> Float {
    if exponent == 0 {
        return 1
    } else {
        return base * power(base, exponent - 1)
    }
}

```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 value = cache[key] {
            value
        } else {
            let result = function(key)
            cache[key] = result
            result
        }
    }
}

// Function that calculates the factorial of a given number.
func factorial(n: Int) -> Int {
    if n == 0 {
        return 1
    } else {
        return n * factorial(n - 1)
    }
}

// Function that calculates the Fibonacci sequence up to a given number.
func fibonacci(n: Int) -> Int {
    if n == 0 {
        return 0
    } else if n == 1 {
        return 1
    } else {
        return fibonacci(n - 1) + fibonacci(n - 2)
    }
}

// Function that calculates the sum of all the digits of a given number.
func sumOfDigits(n: Int) -> Int {
    if n == 0 {
        return 0
    } else {
        return (n % 10) + sumOfDigits(n / 10)
    }
}

// Function that checks if a given number is a palindrome.
func isPalindrome(n: Int) -> Bool {
    return n == reverse(n)
}

// Function that calculates the power of a given number raised to a given exponent.
func power(base: Float, exponent: Int) -> Float {
    if exponent == 0 {
        return 1
    } else {
        return base * power(base, exponent - 1)
    }
}

// Function that calculates the sum of all the digits of a given number.
func sumOfDigits(n: Int) -> Int {
    if n == 0 {
        return 0
    } else {
        return (n % 10) + sumOfDigits(n / 10)
    }
}

// Function that checks if a given number is a palindrome.
func isPalindrome(n: Int) -> Bool {
    return n == reverse(n)
}

// Function that calculates the power of a given number raised to a given exponent.
func power(base: Float, exponent: Int) -> Float {
    if exponent == 0 {
        return 1
    } else {
        return base * power(base, exponent - 1)
    }
}

// Function that calculates the sum of all the digits of a given number.
func sumOfDigits(n: Int) -> Int {
    if n == 0 {
        return 0
    } else {
        return (n % 10) + sumOfDigits(n / 10)
    }
}

// Function that checks if a given number is a palindrome.
func isPalindrome(n: Int) -> Bool {
    return n == reverse(n)
}

// Function that calculates the power of a given number raised to a given exponent.
func power(base: Float, exponent: Int) -> Float {
    if exponent == 0 {
        return 1
    } else {
        return base * power(base, exponent - 1)
    }
}

// Function that calculates the sum of all the digits of a given number.
func sumOfDigits(n: Int) -> Int {
    if n == 0 {
        return 0
    } else {
        return (n % 10) + sumOfDigits(n / 10)
    }
}

// Function that checks if a given number is a palindrome.
func isPalindrome(n: Int) -> Bool {
    return n == reverse(n)
}

// Function that calculates the power of a given number raised to a given exponent.
func power(base: Float, exponent: Int) -> Float {
    if exponent == 0 {
        return 1
    } else {
        return base * power(base, exponent - 1)
    }
}

// Function that calculates the sum of all the digits of a given number.
func sumOfDigits(n: Int) -> Int {
    if n == 0 {
        return 0
    } else {
        return (n % 10) + sumOfDigits(n / 10)
    }
}

// Function that checks if a given number is a palindrome.
func isPalindrome(n: Int) -> Bool {
    return n == reverse(

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

```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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {
      throw error!
    }
  }
  return task()
}

// 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 1...attempts {
    try {
      return task()
    } catch (e) {
      error = e
    }
    if i == attempts {

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
        }
    }
    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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
        }
    }
    throw error!
}

// 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
    

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

// Example usage
let result = retry(3, {
    // Simulate a network request that may fail
    if random(0..<100) < 50 {
        throw "Network error"
    } else {
        "Success"
    }
})
print(result) // Prints "Success"
```

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))
    }
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    for i in 0..<attempts {
        try {
            return task()
        } catch {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

```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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// Example usage:
let result = retry(3, {
    // Code to execute in a retryable block
    // ...
})
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
  for attempt in 1...attempts {
    try {
      return task()
    } catch {
      if attempt == attempts {
        throw
      }
    }
  }
  return task()
}

func main() throws {
  var result = retry(3, {
    print("Attempting to fetch data...")
    let response = try! fetch("https://example.com")
    print("Data fetched successfully!")
    return response.bodyString()
  })
  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 attempt in 1...attempts {
    try {
      return task()
    } catch {
      if attempt == attempts {
        throw
      }
    }
  }
  return task()
}

// Example usage:
func main() throws {
  var result = retry(3, {
    print("Attempting to fetch data...")
    let response = try! fetch("https://example.com")
    print("Data fetched successfully!")
    return response.bodyString()
  })
  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
        }
    }
    throw error!
}

func main() {
    let result = retry(3, {
        let response = try! httpGet("https://example.com")
        let body = String(responseBody: response)
        print("Response body: \(body)")
    })
    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
        }
    }
    throw error!
}

// Example usage:
func main() {
    let result = retry(3, {
        let response = try! httpGet("https://example.com")
        let body = String(responseBody: response)
        print("Response body: \(body)")
    })
    print("Result: \(result)")
}
```

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    for i in 0..<attempts {
        try {
            return task()
        } catch {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

```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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {
            if i == attempts - 1 {
                throw
            }
        }
    }
    return task()
}

// 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 {

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    for i in 0..<attempts {
        try {
            return task()
        } catch {
            print("Attempt $i failed, retrying...")
        }
    }
    throw "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 {
    for i in 0..<attempts {
        try {
            return task()
        } catch {
            print("Attempt $i failed, retrying...")
        }
    }
    throw "All attempts failed"
}

// Example usage:
let result = retry(3) {
    // Perform some task that may fail
    if random(0..<100) < 50 {
        throw "Task failed"
    } else {
        return 42
    }
}
print(result) // Output: 42
```

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

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

func task() throws -> Int {
  return 42
}

func task2() throws -> Int {
  return 42
}

func task3() throws -> Int {
  return 42
}

func task4() throws -> Int {
  return 42
}

func task5() throws -> Int {
  return 42
}

func task6() throws -> Int {
  return 42
}

func task7() throws -> Int {
  return 42
}

func task8() throws -> Int {
  return 42
}

func task9() throws -> Int {
  return 42
}

func task10() throws -> Int {
  return 42
}

func task11() throws -> Int {
  return 42
}

func task12() throws -> Int {
  return 42
}

func task13() throws -> Int {
  return 42
}

func task14() throws -> Int {
  return 42
}

func task15() throws -> Int {
  return 42
}

func task16() throws -> Int {
  return 42
}

func task17() throws -> Int {
  return 42
}

func task18() throws -> Int {
  return 42
}

func task19() throws -> Int {
  return 42
}

func task20() throws -> Int {
  return 42
}

func task21() throws -> Int {
  return 42
}

func task22() throws -> Int {
  return 42
}

func task23() throws -> Int {
  return 42
}

func task24() throws -> Int {
  return 42
}

```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 1...attempts {
    try {
      return task()
    } catch err {
      error = err
    }
    if i == attempts {
      throw error!
    }
  }
  throw error!
}

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

// An example of a task that retries a specified number of times before failing.
func task() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task2() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task3() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task4() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task5() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task6() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task7() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task8() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task9() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task10() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task11() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task12() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task13() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task14() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task15() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task16() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task17() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task18() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task19() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task20() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task21() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task22() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task23() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func task24() throws -> Int {
  return 42
}

// An example of a task that retries a specified number of times before failing.
func

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

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

// Example usage:
let container = DIContainer()
container.register<IUserService>(_type: IUserService.Type, factory: { () -> IUserService in
    return IUserService()
})
container.register<IUserRepo>(_type: IUserRepo.Type, factory: { () -> IUserRepo in
    return IUserRepo()
})
let userService = container.resolve<IUserService>(IUserService.Type)
let userRepo = container.resolve<IUserRepo>(IUserRepo.Type)
```

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? {
        return _factories[type]() as? T
    }
}

protocol ServiceProtocol {
    func perform()
}

class ConcreteService: ServiceProtocol {
    override func perform() {
        print("Performing the service...")
    }
}

```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? {
        return _factories[type]() as? T
    }
}

// Example usage:

// Define a protocol for a service.
protocol ServiceProtocol {
    func perform()
}

// Define a concrete service implementation.
class ConcreteService: ServiceProtocol {
    override func perform() {
        print("Performing the service...")
    }
}

// Define a dependency injection container.
let container = DIContainer()

// Register the service implementation.
container.register<ServiceProtocol>(ConcreteService, factory: { ConcreteService() })

// Resolve the service and perform it.
let service = container.resolve<ServiceProtocol>()
service?.perform()
```

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? {
        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: [Type: @escaping () -> Any] = [:]
    
    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<Foo>(_ type: Foo.Type, factory: { Foo() })
let foo: Foo? = container.resolve<Foo>()

```

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] = [:]
    
    // Register a factory for a given type.
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _factories[type] = factory
    }
    
    // Resolve a type from the container.
    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] = [:]
    
    // Register a factory for a given type.
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _factories[type] = factory
    }
    
    // Resolve a type from the container.
    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<Logger>(_ type: Logger.Type, factory: { () -> Logger in
    return Logger()
})
container.register<Database>(_ type: Database.Type, factory: { () -> Database in
    return Database()
})
container.register<UserService>(_ type: UserService.Type, factory: { () -> UserService in
    let logger = container.resolve<Logger>()!
    let database = container.resolve<Database>()!
    return UserService(logger: logger, database: database)
})
let userService = container.resolve<UserService>()!
userService.greet() // Output: "Hello, World!"
```

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

// Example usage:
let container = DIContainer()
container.register(Foo, { Foo() })
container.register(Bar, { Bar() })

let foo = container.resolve(Foo)
let bar = container.resolve(Bar)

print(foo) // prints Foo
print(bar) // prints Bar
```

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

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

    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: [Type: @escaping () -> Any] = {}

    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:

struct Foo {}
struct Bar {}

let container = DIContainer()
container.register<Foo>(factory: { _ -> Foo { return Foo() } })
container.register<Bar>(factory: { _ -> Bar { return Bar() } })

let foo = container.resolve<Foo>()
let bar = container.resolve<Bar>()

print(foo) // prints: Foo
print(bar) // prints: Bar
```

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()
    
    public init() {
        self.register(Any.Type, @escaping () -> Any { return nil })
        self.register(String.Type, @escaping () -> String { return "" })
        self.register(Int.Type, @escaping () -> Int { return 0 })
    }
    
    public func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._registry[type] = factory
    }
    
    public func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = self._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()
    
    public init() {
        self.register(Any.Type, @escaping () -> Any { return nil })
        self.register(String.Type, @escaping () -> String { return "" })
        self.register(Int.Type, @escaping () -> Int { return 0 })
    }
    
    public func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        self._registry[type] = factory
    }
    
    public func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = self._registry[type] else {
            return nil
        }
        return factory() as T?
    }
}

// Example usage:
let container = DIContainer()
container.register(String.Type, @escaping () -> String { return "Hello, World!" })
let string = container.resolve(String.Type)
print(string) // Output: "Hello, World!"

```

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

class DIContainer: DIContainerProtocol {
    private var _registry: [Type: Any] = {}
    
    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: [Type: Any] = {}
    
    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<ISomething>(factory: { SomeThing() })
let thing = container.resolve<ISomething>()
thing.doSomething()
```

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

class DIContainer: DIContainerProtocol {
    private var _registry: [Type: Any] = {}

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

    override func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = self._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: [Type: Any] = {}

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

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

// Example usage:
let container = DIContainer()
container.register<ILogger>(factory: { Logger() })
container.register<IRepository>(factory: { UserRepository() })
container.register<IService>(factory: { Service(repository: container.resolve<IRepository>()) })
let service = container.resolve<IService>()
service.run()

```

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

class DIContainer: DIContainerProtocol {
    var _container: MutableDictionary<Type, Any?> = [:]
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _container[type] = factory()
    }

    func resolve<T>(_ type: T.Type) -> T? {
        return _container[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 {
    var _container: MutableDictionary<Type, Any?> = [:]
    
    func register<T>(_ type: T.Type, factory: @escaping () -> T) {
        _container[type] = factory()
    }

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

// Example usage:
let container = DIContainer()
container.register(SomeService, SomeService())
let service = container.resolve<SomeService>()
```

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 {
    // The current state.
    override var state: State {
        return self.state
    }
    // The current state.
    var currentState: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> = Map()
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<State, Map<Event, State>> {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // A map of all possible transitions.
    var transitions: Map<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 {
    // The current state.
    override var state: State {
        return _state
    }
    // The current state.
    private var _state: State
    // The set of registered transitions.
    private var _transitions: [State: [Event: State]] = [:]
    // The set of registered transitions.
    public var transitions: [State: [Event: State]] {
        return _transitions
    }
    // The set of registered transitions.
    public init(state: State) {
        self.state = state
    }
    // The set of registered transitions.
    public func registerTransition(from: State, to: State, event: Event) {
        self._transitions[from][event] = to
    }
    // The set of registered transitions.
    public func trigger(event: Event) {
        var newState: State? = self._transitions[self.state][event]
        if newState != nil {
            self._state = newState
        }
    }
}

class ExampleStateMachine: StateMachineProtocol {
    override var state: State {
        return "initial"
    }
    override func trigger(event: Event) {
        // ...
    }
    override 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 {
    // The current state.
    override var state: State {
        return _state
    }
    // The current state.
    private var _state: State
    // The set of registered transitions.
    private var _transitions: [State: [Event: State]] = [:]
    // The set of registered transitions.
    public var transitions: [State: [Event: State]] {
        return _transitions
    }
    // The set of registered transitions.
    public init(state: State) {
        self.state = state
    }
    // The set of registered transitions.
    public func registerTransition(from: State, to: State, event: Event) {
        self._transitions[from][event] = to
    }
    // The set of registered transitions.
    public func trigger(event: Event) {
        var newState: State? = self._transitions[self.state][event]
        if newState != nil {
            self._state = newState
        }
    }
}

// Example usage:
class ExampleStateMachine: StateMachineProtocol {
    override var state: State {
        return "initial"
    }
    override func trigger(event: Event) {
        // ...
    }
    override func registerTransition(from: State, to: State, event: Event) {
        // ...
    }
}

// Usage:
let stateMachine: ExampleStateMachine = ExampleStateMachine()
stateMachine.trigger("event")
print(stateMachine.state) // prints "final"
```

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 {
    // The current state of the machine.
    override var state: State {
        return _state
    }
    // The state machine's current state.
    private var _state: State
    // A map of state transitions.
    private var transitions: [State: [Event: State]]
    // A map of state transitions.
    init(state: State) {
        _state = state
        transitions = [State: [Event: State]]()
    }
    // Register a transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from][event] = to
    }
    // Trigger an event to transition the state machine.
    func trigger(event: Event) {
        let nextState = transitions[state][event]
        if nextState != nil {
            _state = nextState
        }
    }
}

class GameStateMachine: StateMachineProtocol {
    // The current state of the game.
    override var state: GameState {
        return _state
    }
    // The game state machine's current state.
    private var _state: GameState
    // A map of state transitions.
    private var transitions: [GameState: [GameState: GameState]]
    // A map of state transitions.
    init(state: GameState) {
        _state = state
        transitions = [GameState: [GameState: GameState]]()
    }
    // Register a transition between states.
    func registerTransition(from: GameState, to: GameState, event: GameState) {
        transitions[from][event] = to
    }
    // Trigger an event to transition the game state machine.
    func trigger(event: GameState) {
        let nextState = transitions[state][event]
        if nextState != nil {
            _state = nextState
        }
    }
}

```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 {
    // The current state of the machine.
    override var state: State {
        return _state
    }
    // The state machine's current state.
    private var _state: State
    // A map of state transitions.
    private var transitions: [State: [Event: State]]
    // A map of state transitions.
    init(state: State) {
        _state = state
        transitions = [State: [Event: State]]()
    }
    // Register a transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from][event] = to
    }
    // Trigger an event to transition the state machine.
    func trigger(event: Event) {
        let nextState = transitions[state][event]
        if nextState != nil {
            _state = nextState
        }
    }
}

// A state machine that can be used to represent a game state.
class GameStateMachine: StateMachineProtocol {
    // The current state of the game.
    override var state: GameState {
        return _state
    }
    // The game state machine's current state.
    private var _state: GameState
    // A map of state transitions.
    private var transitions: [GameState: [GameState: GameState]]
    // A map of state transitions.
    init(state: GameState) {
        _state = state
        transitions = [GameState: [GameState: GameState]]()
    }
    // Register a transition between states.
    func registerTransition(from: GameState, to: GameState, event: GameState) {
        transitions[from][event] = to
    }
    // Trigger an event to transition the game state machine.
    func trigger(event: GameState) {
        let nextState = transitions[state][event]
        if nextState != nil {
            _state = nextState
        }
    }
}

// A state machine that can be used to represent a game state.
class GameStateMachine: StateMachineProtocol {
    // The current state of the game.
    override var state: GameState {
        return _state
    }
    // The game state machine's current state.
    private var _state: GameState
    // A map of state transitions.
    private var transitions: [GameState: [GameState: GameState]]
    // A map of state transitions.
    init(state: GameState) {
        _state = state
        transitions = [GameState: [GameState: GameState]]()
    }
    // Register a transition between states.
    func registerTransition(from: GameState, to: GameState, event: GameState) {
        transitions[from][event] = to
    }
    // Trigger an event to transition the game state machine.
    func trigger(event: GameState) {
        let nextState = transitions[state][event]
        if nextState != nil {
            _state = nextState
        }
    }
}

// A state machine that can be used to represent a game state.
class GameStateMachine: StateMachineProtocol {
    // The current state of the game.
    override var state: GameState {
        return _state
    }
    // The game state machine's current state.
    private var _state: GameState
    // A map of state transitions.
    private var transitions: [GameState: [GameState: GameState]]
    // A map of state transitions.
    init(state: GameState) {
        _state = state
        transitions = [GameState: [GameState: GameState]]()
    }
    // Register a transition between states.
    func registerTransition(from: GameState, to: GameState, event: GameState) {
        transitions[from][event] = to
    }
    // Trigger an event to transition the game state machine.
    func trigger(event: GameState) {
        let nextState = transitions[state][event]
        if nextState != nil {
            _state = nextState
        }
    }
}

// A state machine that can be used to represent a game state.
class GameStateMachine: StateMachineProtocol {
    // The current state of the game.
    override var state: GameState {
        return _state
    }
    // The game state machine's current state.
    private var _state: GameState
    // A map of state transitions.
    private var transitions: [GameState: [GameState: GameState]]
    // A map of state transitions.
    init(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 {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition between states.
    var transitions: [State: [Event: State]] {
        return self.transitions
    }
    // Transition between states.
    var transitions: [State: [Event: State]] {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // Register transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
    // Trigger event.
    func trigger(event: Event) {
        self.state = self.transitions[self.state][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 {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition between states.
    var transitions: [State: [Event: State]] {
        return self.transitions
    }
    // Transition between states.
    var transitions: [State: [Event: State]] {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // Register transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
    // Trigger event.
    func trigger(event: Event) {
        self.state = self.transitions[self.state][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 {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition between states.
    var transitions: [State: [Event: State]] {
        return self.transitions
    }
    // Transition between states.
    var transitions: [State: [Event: State]] {
        get {
            return self.transitions
        }
        set {
            self.transitions = value
        }
    }
    // Register transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        self.transitions[from][event] = to
    }
    // Trigger event.
    func trigger(event: Event) {
        self.state = self.transitions[self.state][event]
    }
}
```

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 {
    // The current state.
    override var state: State {
        return self.state
    }
    // The current state.
    var state: State
    // A map of events to the next state.
    var transitions: Map<Event, State>
    // A map of states to the next states.
    var states: Map<State, State>
    // A map of states to the events that can trigger transitions.
    var events: Map<State, Set<Event>>
    // A map of events to the states that can trigger them.
    var eventsToStates: Map<Event, Set<State>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of events to the states that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event>>
    // A map of states to the events that can trigger them.
    var statesToEvents: Map<State, Set<Event

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 let _state: State
    private var _transitions: [State: [Event: State]]
    
    init(state: State) {
        self._state = state
        self._transitions = {}
    }
    
    var state: State {
        get { return self._state }
        set {
            self._state = value
        }
    }
    
    func trigger(event: Event) {
        guard let transition = self._transitions[self.state][event] else {
            fatalError("No transition found for state: \(self.state) and event: \(event)")
        }
        self.state = transition
    }
    
    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 {
    associatedtype State
    associatedtype Event
    
    private let _state: State
    private var _transitions: [State: [Event: State]]
    
    init(state: State) {
        self._state = state
        self._transitions = {}
    }
    
    var state: State {
        get { return self._state }
        set {
            self._state = value
        }
    }
    
    func trigger(event: Event) {
        guard let transition = self._transitions[self.state][event] else {
            fatalError("No transition found for state: \(self.state) and event: \(event)")
        }
        self.state = transition
    }
    
    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.A, to: State.C, event: Event.C1)
stateMachine.registerTransition(from: State.B, to: State.A, event: Event.A2)
stateMachine.registerTransition(from: State.C, to: State.A, event: Event.A3)

stateMachine.trigger(event: Event.B1)
print(stateMachine.state) // prints "B"
stateMachine.trigger(event: Event.C1)
print(stateMachine.state) // prints "C"
stateMachine.trigger(event: Event.A2)
print(stateMachine.state) // prints "A"
stateMachine.trigger(event: Event.A3)
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 {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition table.
    var transitionTable: [State: [Event: State]]
    // Transition table.
    var transitionTable: [State: [Event: State]] {
        get {
            return self.transitionTable
        }
        set {
            self.transitionTable = value
        }
    }
    // Transition table.
    var transitionTable: [State: [Event: State]] {
        get {
            return self.transitionTable
        }
        set {
            self.transitionTable = value
        }
    }
    // Register a transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        if let states = transitionTable[from] {
            states[event] = to
        } else {
            transitionTable[from] = [event: to]
        }
    }
    // Trigger a transition.
    func trigger(event: Event) {
        if let states = transitionTable[state] {
            state = states[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 {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition table.
    var transitionTable: [State: [Event: State]]
    // Transition table.
    var transitionTable: [State: [Event: State]] {
        get {
            return self.transitionTable
        }
        set {
            self.transitionTable = value
        }
    }
    // Transition table.
    var transitionTable: [State: [Event: State]] {
        get {
            return self.transitionTable
        }
        set {
            self.transitionTable = value
        }
    }
    // Register a transition between states.
    func registerTransition(from: State, to: State, event: Event) {
        if let states = transitionTable[from] {
            states[event] = to
        } else {
            transitionTable[from] = [event: to]
        }
    }
    // Trigger a transition.
    func trigger(event: Event) {
        if let states = transitionTable[state] {
            state = states[event]
        }
    }
}

// Example of usage.
class ExampleStateMachine: StateMachine<State: Int, Event: Int> {
    // State machine state.
    override var state: State {
        return 0
    }
    // Transition table.
    override var transitionTable: [State: [Event: State]] {
        return [
            0: {
                0: 1,
                1: 2,
            },
            1: {
                0: 3,
            },
            2: {
                1: 4,
            },
            3: {
                0: 5,
            },
            4: {
                1: 6,
            },
            5: {
                0: 7,
            },
            6: {
                1: 8,
            },
            7: {
                0: 9,
            },
            8: {
                1: 10,
            },
            9: {
                0: 11,
            },
            10: {
                1: 12,
            },
            11: {
                0: 13,
            },
            12: {
                1: 14,
            },
            13: {
                0: 15,
            },
            14: {
                1: 16,
            },
            15: {
                0: 17,
            },
            16: {
                1: 18,
            },
            17: {
                0: 19,
            },
            18: {
                1: 20,
            },
            19: {
                0: 21,
            },
            20: {
                1: 22,
            },
            21: {
                0: 23,
            },
            22: {
                1: 24,
            },
            23: {
                0: 25,
            },
            24: {
                1: 26,
            },
            25: {
                0: 27,
            },
            26: {
                1: 28,
            },
            27: {
                0: 29,
            },
            28: {
                1: 30,
            },
            29: {
                0: 31,
            },
            30: {
                1: 32,
            },
            31: {
                0: 33,
            },
            32: {
                1: 34,
            },
            33: {
                0: 35,
            },
            34: {
                1: 36,
            },
            35: {
                0: 37,
            },
            36: {
                1: 38,
            },
            37: {
                

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 {
    // The current state of the machine.
    override var state: State {
        get = self.currentState
        set = self.setState
    }
    // The current state of the machine.
    private var currentState: State {
        get = self.state
        set = self.setState
    }
    // A dictionary mapping states to dictionaries mapping events to states.
    private var transitionTable: Dictionary<State, Dictionary<Event, State>> = {}
    // A dictionary mapping states to dictionaries mapping events to actions.
    private var actionTable: Dictionary<State, Dictionary<Event, Action>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping events to side effects.
    private var sideEffectTable: Dictionary<State, Dictionary<Event, SideEffect>> = {}
    // A dictionary mapping states to dictionaries mapping

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 {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

class StateMachineWithCustomTransitions<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

class StateMachineWithCustomTransitionsAndCustomEvents<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

class StateMachineWithCustomTransitionsAndCustomEventsAndCustomStates<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

class StateMachineWithCustomTransitionsAndCustomEventsAndCustomStatesAndCustomTypes<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

```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 {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachineWithCustomTransitions<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachineWithCustomTransitionsAndCustomEvents<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachineWithCustomTransitionsAndCustomEventsAndCustomStates<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachineWithCustomTransitionsAndCustomEventsAndCustomStatesAndCustomTypes<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {
        fatalError("Not implemented")
    }
    // Trigger event from current state.
    func trigger(event: Event) {
        fatalError("Not implemented")
    }
}

// Finite state machine with possibility to register custom transitions between states.
class StateMachineWithCustomTransitionsAndCustomEventsAndCustomStatesAndCustomTypesAndCustomEvents<State: Hashable, Event: Hashable>: StateMachineProtocol {
    // State machine state.
    override var state: State {
        return self.state
    }
    // State machine state.
    override var state: State {
        get {
            return self.state
        }
        set {
            self.state = value
        }
    }
    // Transition from state to state for event.
    func registerTransition(from: State, to: State, event: Event) {

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 {
    // The current state.
    override var state: State {
        return _state
    }
    // The current state.
    private var _state: State
    // The transition map.
    private var _transitions: Map<State, Map<Event, State>>
    // The transition map.
    public var transitions: Map<State, Map<Event, State>> {
        get {
            return _transitions
        }
    }
    // The transition map.
    public init(state: State) {
        self.state = state
        _transitions = Map<State, Map<Event, State>>()
    }
    // Trigger an event.
    public func trigger(event: Event) {
        // Get the next state.
        let nextState = _transitions[state]?.get(event)
        // If there is a next state, set the state to the next state.
        if let nextState = nextState {
            _state = nextState
        }
    }
    // Register a transition.
    public func registerTransition(from: State, to: State, event: Event) {
        if !_transitions.containsKey(from) {
            _transitions[from] = Map<Event, State>()
        }
        _transitions[from]?.insert(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 {
    // The current state.
    override var state: State {
        return _state
    }
    // The current state.
    private var _state: State
    // The transition map.
    private var _transitions: Map<State, Map<Event, State>>
    // The transition map.
    public var transitions: Map<State, Map<Event, State>> {
        get {
            return _transitions
        }
    }
    // The transition map.
    public init(state: State) {
        self.state = state
        _transitions = Map<State, Map<Event, State>>()
    }
    // Trigger an event.
    public func trigger(event: Event) {
        // Get the next state.
        let nextState = _transitions[state]?.get(event)
        // If there is a next state, set the state to the next state.
        if let nextState = nextState {
            _state = nextState
        }
    }
    // Register a transition.
    public func registerTransition(from: State, to: State, event: Event) {
        if !_transitions.containsKey(from) {
            _transitions[from] = Map<Event, State>()
        }
        _transitions[from]?.insert(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 size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                contents.map { it.totalSize }.reduce(0) { a, b -> a + b }
            }
        }
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                count += contents.map { it.filesCount }.reduce(0) { a, b -> a + b }
            }
        }
        count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                depth = 1 + contents.map { it.treeDepth }.reduce(0) { a, b -> max(a, b) }
            }
        }
        depth
    }
}

class FileSystemManager {
    var root: FileSystemNode
    var info: FileSystemInfo
    init(root: FileSystemNode) {
        self.root = root
        self.info = root
    }

    var totalSize: Int { get } {
        self.info.totalSize
    }

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

    var treeDepth: Int { get } {
        self.info.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 size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                contents.map { it.totalSize }.reduce(0) { a, b -> a + b }
            }
        }
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                count += contents.map { it.filesCount }.reduce(0) { a, b -> a + b }
            }
        }
        count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                depth = 1 + contents.map { it.treeDepth }.reduce(0) { a, b -> max(a, b) }
            }
        }
        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 info: FileSystemInfo
    init(root: FileSystemNode) {
        self.root = root
        self.info = root
    }

    var totalSize: Int { get } {
        self.info.totalSize
    }

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

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

// Example file system tree.
let root = directory("root", [
    file("file1.txt", 100),
    file("file2.txt", 200),
    directory("dir1", [
        file("file3.txt", 300),
        directory("dir2", [
            file("file4.txt", 400),
            file("file5.txt", 500)
        ])
    ])
])

// Create file system manager.
let manager = FileSystemManager(root)

// Calculate total size, files count and file system tree depth.
print("Total size:", manager.totalSize)
print("Files count:", manager.filesCount)
print("File system tree depth:", manager.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 size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                size = 0
                for (node in contents) {
                    size += node.totalSize
                }
                size
            }
        }
    }
    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                count = 0
                for (node in contents) {
                    count += node.filesCount
                }
                count
            }
        }
    }
    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                depth = 0
                for (node in contents) {
                    depth = max(depth, node.treeDepth)
                }
                depth + 1
            }
        }
    }
}

```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) {
                size = 0
                for (node in contents) {
                    size += node.totalSize
                }
                size
            }
        }
    }
    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                count = 0
                for (node in contents) {
                    count += node.filesCount
                }
                count
            }
        }
    }
    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                depth = 0
                for (node in contents) {
                    depth = max(depth, node.treeDepth)
                }
                depth + 1
            }
        }
    }
}

// File system manager that calculates metadata for all files in file system.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                size = 0
                for (node in contents) {
                    size += node.totalSize
                }
                size
            }
        }
    }
    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                count = 0
                for (node in contents) {
                    count += node.filesCount
                }
                count
            }
        }
    }
    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                depth = 0
                for (node in contents) {
                    depth = max(depth, node.treeDepth)
                }
                depth + 1
            }
        }
    }
}

// File system manager that calculates metadata for all files in file system.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                size = 0
                for (node in contents) {
                    size += node.totalSize
                }
                size
            }
        }
    }
    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                count = 0
                for (node in contents) {
                    count += node.filesCount
                }
                count
            }
        }
    }
    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth
            }
            case directory(contents: var contents) {
                depth = 0
                for (node in contents) {
                    depth = max(depth, node.treeDepth)
                }
                depth + 1
            }
        }
    }
}

// File system manager that calculates metadata for all files in file system.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        var size = 0
        switch self {
            case file(size: var size) {
                size
            }
            case directory(contents: var contents) {
                size = 0
                for (node in contents) {
                    size += node.totalSize
                }
                size
            }
        }
    }
    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count += 1
            }
            case directory(contents: var contents) {
                count = 0

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 }
}

extension FileSystemNode {
    var name: String { get }
}

extension FileSystemNode {
    var size: Int { get }
}

extension FileSystemNode {
    var contents: [FileSystemNode] { get }
}

extension FileSystemNode {
    var depth: Int { get }
}

extension FileSystemNode {
    var isDirectory: Bool { get } {
        return self.contents.count > 0
    }
}

extension FileSystemNode {
    var isFile: Bool { get } {
        return self.contents.count == 0
    }
}

extension FileSystemNode {
    var isLeaf: Bool { get } {
        return self.depth == 1
    }
}

extension FileSystemNode {
    var isRoot: Bool { get } {
        return self.depth == 0
    }
}

extension FileSystemNode {
    var isFileOrLeaf: Bool { get } {
        return self.isFile || self.isLeaf
    }
}

extension FileSystemNode {
    var isFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrLeaf: Bool { get } {
        return self.isFile || self.isDirectory || self.isLeaf
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRoot: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeaf: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile
    }
}

```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 }
}

extension FileSystemNode {
    var name: String { get }
}

extension FileSystemNode {
    var size: Int { get }
}

extension FileSystemNode {
    var contents: [FileSystemNode] { get }
}

extension FileSystemNode {
    var depth: Int { get }
}

extension FileSystemNode {
    var isDirectory: Bool { get } {
        return self.contents.count > 0
    }
}

extension FileSystemNode {
    var isFile: Bool { get } {
        return self.contents.count == 0
    }
}

extension FileSystemNode {
    var isLeaf: Bool { get } {
        return self.depth == 1
    }
}

extension FileSystemNode {
    var isRoot: Bool { get } {
        return self.depth == 0
    }
}

extension FileSystemNode {
    var isFileOrLeaf: Bool { get } {
        return self.isFile || self.isLeaf
    }
}

extension FileSystemNode {
    var isFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrLeaf: Bool { get } {
        return self.isFile || self.isDirectory || self.isLeaf
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRoot: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeaf: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFileOrDirectory: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOrLeafOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFileOrDirectoryOrFile: Bool { get } {
        return self.isFile || self.isDirectory || self.isRoot || self.isLeaf || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile || self.isDirectory || self.isFile
    }
}

extension FileSystemNode {
    var isFileOrDirectoryOrRootOr

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 child in c {
                    size += child.totalSize
                }
            }
        }
        return size
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count = 1
            }
            case directory(contents: var c) {
                for let child in c {
                    count += child.filesCount
                }
            }
        }
        return count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth = 1
            }
            case directory(contents: var c) {
                for let child in c {
                    depth = max(depth, child.treeDepth)
                }
                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 FileSystemManagerFactory {
    func create(root: FileSystemNode) -> FileSystemManager {
        return FileSystemManager(root: root)
    }
}

class FileSystemManagerFactory {
    init() {}
}

extension FileSystemManager {
    var totalSize: Int { get } {
        return root.totalSize
    }

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

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

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

```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 child in c {
                    size += child.totalSize
                }
            }
        }
        return size
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file() {
                count = 1
            }
            case directory(contents: var c) {
                for let child in c {
                    count += child.filesCount
                }
            }
        }
        return count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file() {
                depth = 1
            }
            case directory(contents: var c) {
                for let child in c {
                    depth = max(depth, child.treeDepth)
                }
                depth += 1
            }
        }
        return depth
    }
}

// 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
    }

    init(root: FileSystemNode) {
        self.root = root
    }
}

// File system manager factory.
// Used to create file system manager.
extension FileSystemManagerFactory {
    func create(root: FileSystemNode) -> FileSystemManager {
        return FileSystemManager(root: root)
    }
}

// File system manager factory implementation.
class FileSystemManagerFactory {
    init() {}
}

// File system manager factory singleton.
let fileSystemManagerFactory = FileSystemManagerFactory()

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
let fileSystemManager = fileSystemManagerFactory.create(root: fileSystemNode)

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return root.totalSize
    }

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

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

// File system node.
// Used to represent file system node.
enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
let fileSystemManager = fileSystemManagerFactory.create(root: fileSystemNode)

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemManager {
    var totalSize: Int { get } {
        return root.totalSize
    }

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

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

// File system node.
// Used to represent file system node.
enum FileSystemNode {
    case file(name: String, size: Int)
    case directory(name: String, contents: [FileSystemNode])
}

// File system manager factory.
// Used to create file system manager.
extension FileSystemManagerFactory {
    func create(root: FileSystemNode) -> FileSystemManager {
        return FileSystemManager(root: root)
    }
}

// File system manager factory implementation.
class FileSystemManagerFactory {
    init() {}
}

// File system manager factory singleton.
let fileSystemManagerFactory = FileSystemManagerFactory()

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
let fileSystemManager = fileSystemManagerFactory.create(root: fileSystemNode)

// File system manager implementation.
// Used to calculate total size of all files

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.
    func calculateTotalSize(node: FileSystemNode) {
        totalSize += node.totalSize
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTotalSize(child)
            }
        }
    }

    // Calculate files count in file system.
    func calculateFilesCount(node: FileSystemNode) {
        filesCount += node.filesCount
        if let directory = node as? directory {
            for child in directory.contents {
                calculateFilesCount(child)
            }
        }
    }

    // Calculate file system tree depth.
    func calculateTreeDepth(node: FileSystemNode, depth: Int) {
        treeDepth = max(treeDepth, depth)
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTreeDepth(child, depth + 1)
            }
        }
    }

    // Calculate total size, files count and file system tree depth.
    func calculateFileSystemInfo(node: FileSystemNode) {
        calculateTotalSize(node)
        calculateFilesCount(node)
        calculateTreeDepth(node, 0)
    }
}

class FileSystemNodeFile: FileSystemNode {
    var name: String
    var size: Int

    init(name: String, size: Int) {
        self.name = name
        self.size = size
    }

    // Calculate total size of file.
    var totalSize: Int { get } {
        return self.size
    }

    // Calculate files count of file.
    var filesCount: Int { get } {
        return 1
    }
}

class FileSystemNodeDirectory: FileSystemNode {
    var name: String
    var contents: [FileSystemNode]

    init(name: String, contents: [FileSystemNode]) {
        self.name = name
        self.contents = contents
    }

    // Calculate total size of directory.
    var totalSize: Int { get } {
        var totalSize = 0
        for child in self.contents {
            totalSize += child.totalSize
        }
        return totalSize
    }

    // Calculate files count of directory.
    var filesCount: Int { get } {
        var filesCount = 0
        for child in self.contents {
            filesCount += child.filesCount
        }
        return filesCount
    }
}

class FileSystemManager: FileSystemInfo {
    var totalSize: Int = 0
    var filesCount: Int = 0
    var treeDepth: Int = 0

    // Calculate total size of all files in file system.
    func calculateTotalSize(node: FileSystemNode) {
        totalSize += node.totalSize
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTotalSize(child)
            }
        }
    }

    // Calculate files count in file system.
    func calculateFilesCount(node: FileSystemNode) {
        filesCount += node.filesCount
        if let directory = node as? directory {
            for child in directory.contents {
                calculateFilesCount(child)
            }
        }
    }

    // Calculate file system tree depth.
    func calculateTreeDepth(node: FileSystemNode, depth: Int) {
        treeDepth = max(treeDepth, depth)
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTreeDepth(child, depth + 1)
            }
        }
    }

    // Calculate total size, files count and file system tree depth.
    func calculateFileSystemInfo(node: FileSystemNode) {
        calculateTotalSize(node)
        calculateFilesCount(node)
        calculateTreeDepth(node, 0)
    }
}

```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 that calculates 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.
    func calculateTotalSize(node: FileSystemNode) {
        totalSize += node.totalSize
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTotalSize(child)
            }
        }
    }

    // Calculate files count in file system.
    func calculateFilesCount(node: FileSystemNode) {
        filesCount += node.filesCount
        if let directory = node as? directory {
            for child in directory.contents {
                calculateFilesCount(child)
            }
        }
    }

    // Calculate file system tree depth.
    func calculateTreeDepth(node: FileSystemNode, depth: Int) {
        treeDepth = max(treeDepth, depth)
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTreeDepth(child, depth + 1)
            }
        }
    }

    // Calculate total size, files count and file system tree depth.
    func calculateFileSystemInfo(node: FileSystemNode) {
        calculateTotalSize(node)
        calculateFilesCount(node)
        calculateTreeDepth(node, 0)
    }
}

// File system node that represents a file in file system.
class FileSystemNodeFile: FileSystemNode {
    var name: String
    var size: Int

    init(name: String, size: Int) {
        self.name = name
        self.size = size
    }

    // Calculate total size of file.
    var totalSize: Int { get } {
        return self.size
    }

    // Calculate files count of file.
    var filesCount: Int { get } {
        return 1
    }
}

// File system node that represents a directory in file system.
class FileSystemNodeDirectory: FileSystemNode {
    var name: String
    var contents: [FileSystemNode]

    init(name: String, contents: [FileSystemNode]) {
        self.name = name
        self.contents = contents
    }

    // Calculate total size of directory.
    var totalSize: Int { get } {
        var totalSize = 0
        for child in self.contents {
            totalSize += child.totalSize
        }
        return totalSize
    }

    // Calculate files count of directory.
    var filesCount: Int { get } {
        var filesCount = 0
        for child in self.contents {
            filesCount += child.filesCount
        }
        return filesCount
    }
}

// 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 = 0
    var filesCount: Int = 0
    var treeDepth: Int = 0

    // Calculate total size of all files in file system.
    func calculateTotalSize(node: FileSystemNode) {
        totalSize += node.totalSize
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTotalSize(child)
            }
        }
    }

    // Calculate files count in file system.
    func calculateFilesCount(node: FileSystemNode) {
        filesCount += node.filesCount
        if let directory = node as? directory {
            for child in directory.contents {
                calculateFilesCount(child)
            }
        }
    }

    // Calculate file system tree depth.
    func calculateTreeDepth(node: FileSystemNode, depth: Int) {
        treeDepth = max(treeDepth, depth)
        if let directory = node as? directory {
            for child in directory.contents {
                calculateTreeDepth(child, depth + 1)
            }
        }
    }

    // Calculate total size, files count and file system tree depth.
    func calculateFileSystemInfo(node: FileSystemNode) {
        calculateTotalSize(node)
        calculateFilesCount(node)
        calculateTreeDepth(node, 0)
    }
}

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: size):
                size = size
            case directory(contents: let contents):
                size = contents.map { it.totalSize }.reduce(0) { a, b -> a + b }
        }
        return size
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file():
                count = 1
            case directory(contents: let contents):
                count = contents.map { it.filesCount }.reduce(0) { a, b -> a + b }
        }
        return count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file():
                depth = 1
            case directory(contents: let contents):
                depth = 1 + contents.map { it.treeDepth }.reduce(0) { a, b -> max(a, b) }
        }
        return depth
    }
}

class FileSystemManager {
    var root: FileSystemNode = directory("root", [])

    init(root: FileSystemNode) {
        self.root = root
    }

    func totalSize() -> Int {
        return root.totalSize
    }

    func filesCount() -> Int {
        return root.filesCount
    }

    func treeDepth() -> Int {
        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 size = 0
        switch self {
            case file(size: size):
                size = size
            case directory(contents: let contents):
                size = contents.map { it.totalSize }.reduce(0) { a, b -> a + b }
        }
        return size
    }

    var filesCount: Int { get } {
        var count = 0
        switch self {
            case file():
                count = 1
            case directory(contents: let contents):
                count = contents.map { it.filesCount }.reduce(0) { a, b -> a + b }
        }
        return count
    }

    var treeDepth: Int { get } {
        var depth = 0
        switch self {
            case file():
                depth = 1
            case directory(contents: let contents):
                depth = 1 + contents.map { it.treeDepth }.reduce(0) { a, b -> max(a, b) }
        }
        return depth
    }
}

// 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 = directory("root", [])

    init(root: FileSystemNode) {
        self.root = root
    }

    func totalSize() -> Int {
        return root.totalSize
    }

    func filesCount() -> Int {
        return root.filesCount
    }

    func treeDepth() -> Int {
        return root.treeDepth
    }
}

// Example usage:
let fileSystemManager = FileSystemManager(
    root: directory("root", [
        file("file1", 100),
        directory("dir1", [
            file("file2", 200),
            file("file3", 300),
        ]),
        directory("dir2", [
            directory("dir3", [
                file("file4", 400),
                file("file5", 500),
            ]),
            file("file6", 600),
        ]),
    ])
)

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 filesCount: Int { get }
    var treeDepth: Int { get }
}

extension FileSystemNode {
    var totalSize: Int {
        var size = 0
        if let node = self {
            size += node.totalSize
        }
        return size
    }

    var filesCount: Int {
        var count = 0
        if let node = self {
            count += node.filesCount
        }
        return count
    }

    var treeDepth: Int {
        var depth = 0
        if let node = self {
            depth += node.treeDepth
        }
        return depth
    }
}

class FileSystemManager: FileSystemInfo {
    var totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }

    init() {
        totalSize = 0
        filesCount = 0
        treeDepth = 0
    }

    func addFile(node: FileSystemNode) {
        if let node = node {
            totalSize += node.totalSize
            filesCount += node.filesCount
            treeDepth = max(treeDepth, node.treeDepth)
        }
    }

    func addDirectory(node: FileSystemNode) {
        if let node = node {
            totalSize += node.totalSize
            filesCount += node.filesCount
            treeDepth = max(treeDepth, node.treeDepth)
            for let child in node.contents {
                addDirectory(child)
            }
        }
    }
}

```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 }
}

extension FileSystemNode {
    var totalSize: Int {
        var size = 0
        if let node = self {
            size += node.totalSize
        }
        return size
    }

    var filesCount: Int {
        var count = 0
        if let node = self {
            count += node.filesCount
        }
        return count
    }

    var treeDepth: Int {
        var depth = 0
        if let node = self {
            depth += node.treeDepth
        }
        return depth
    }
}

// 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 totalSize: Int { get }
    var filesCount: Int { get }
    var treeDepth: Int { get }

    init() {
        totalSize = 0
        filesCount = 0
        treeDepth = 0
    }

    func addFile(node: FileSystemNode) {
        if let node = node {
            totalSize += node.totalSize
            filesCount += node.filesCount
            treeDepth = max(treeDepth, node.treeDepth)
        }
    }

    func addDirectory(node: FileSystemNode) {
        if let node = node {
            totalSize += node.totalSize
            filesCount += node.filesCount
            treeDepth = max(treeDepth, node.treeDepth)
            for let child in node.contents {
                addDirectory(child)
            }
        }
    }
}

// File system manager instance.
var fileSystemManager = FileSystemManager()

// Add files to file system.
fileSystemManager.addFile(FileSystemNode.file("file1.txt", 100))
fileSystemManager.addFile(FileSystemNode.file("file2.txt", 200))
fileSystemManager.addDirectory(FileSystemNode.directory("dir1", [
    FileSystemNode.file("file3.txt", 300),
    FileSystemNode.file("file4.txt", 400),
    FileSystemNode.directory("dir2", [
        FileSystemNode.file("file5.txt", 500),
        FileSystemNode.file("file6.txt", 600),
    ])
]))

// Calculate total size, files count and file system tree depth.
print("Total size: ", fileSystemManager.totalSize)
print("Files count: ", fileSystemManager.filesCount)
print("File system 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: name, size: size) {
            totalSize += size
        } else {
            for node in contents {
                totalSize += node.totalSize
            }
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        if let FileSystemNode.file(name: name, size: _) {
            filesCount += 1
        } else {
            for node in contents {
                filesCount += node.filesCount
            }
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        if let FileSystemNode.file(name: name, size: _) {
            treeDepth += 1
        } else {
            for node in contents {
                treeDepth = max(treeDepth, node.treeDepth)
            }
        }
        return treeDepth
    }
}

class FileSystemManager {
    var root: FileSystemNode {
        // Initialize root directory with some files.
        return FileSystemNode.directory(name: "root", contents: [
            FileSystemNode.file(name: "file1", size: 10),
            FileSystemNode.file(name: "file2", size: 20),
            FileSystemNode.directory(name: "dir1", contents: [
                FileSystemNode.file(name: "file3", size: 30),
                FileSystemNode.file(name: "file4", size: 40),
            ]),
        ])
    }

    var totalSize: Int {
        return root.totalSize
    }

    var filesCount: Int {
        return root.filesCount
    }

    var treeDepth: Int {
        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
        if let FileSystemNode.file(name: name, size: size) {
            totalSize += size
        } else {
            for node in contents {
                totalSize += node.totalSize
            }
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        if let FileSystemNode.file(name: name, size: _) {
            filesCount += 1
        } else {
            for node in contents {
                filesCount += node.filesCount
            }
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        if let FileSystemNode.file(name: name, size: _) {
            treeDepth += 1
        } else {
            for node in contents {
                treeDepth = max(treeDepth, node.treeDepth)
            }
        }
        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 {
        // Initialize root directory with some files.
        return FileSystemNode.directory(name: "root", contents: [
            FileSystemNode.file(name: "file1", size: 10),
            FileSystemNode.file(name: "file2", size: 20),
            FileSystemNode.directory(name: "dir1", contents: [
                FileSystemNode.file(name: "file3", size: 30),
                FileSystemNode.file(name: "file4", size: 40),
            ]),
        ])
    }

    var totalSize: Int {
        return root.totalSize
    }

    var filesCount: Int {
        return root.filesCount
    }

    var treeDepth: Int {
        return root.treeDepth
    }
}

// Example usage:
let fileSystemManager = FileSystemManager()
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 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 newDepth = node.treeDepth + 1
                    if newDepth > depth {
                        depth = newDepth
                    }
                }
            }
        }
        return depth
    }
}

extension FileSystemNode: 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 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 newDepth = node.treeDepth + 1
                    if newDepth > depth {
                        depth = newDepth
                    }
                }
            }
        }
        return depth
    }
}

// File system manager that uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: 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 uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: 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 uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: 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 uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: 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 uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: 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 uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: 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 uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: 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 uses the file system tree to calculate total size, files count and file system tree depth.
extension FileSystemNode: FileSystemInfo {
    var totalSize: Int { get } {
        return self.totalSize
    }

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

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 let file(size):
                totalSize += size
                break
            case let directory(contents):
                for let child in contents {
                    totalSize += child.totalSize
                }
                break
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        switch self {
            case let file():
                filesCount += 1
                break
            case let directory(contents):
                for let child in contents {
                    filesCount += child.filesCount
                }
                break
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        switch self {
            case let file():
                treeDepth += 0
                break
            case let directory(contents):
                for let child in contents {
                    treeDepth = max(treeDepth, child.treeDepth)
                }
                treeDepth += 1
                break
        }
        return 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
        switch self {
            case let file(size):
                totalSize += size
                break
            case let directory(contents):
                for let child in contents {
                    totalSize += child.totalSize
                }
                break
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        switch self {
            case let file():
                filesCount += 1
                break
            case let directory(contents):
                for let child in contents {
                    filesCount += child.filesCount
                }
                break
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        switch self {
            case let file():
                treeDepth += 0
                break
            case let directory(contents):
                for let child in contents {
                    treeDepth = max(treeDepth, child.treeDepth)
                }
                treeDepth += 1
                break
        }
        return treeDepth
    }
}

// File system manager that calculates 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 let file(size):
                totalSize += size
                break
            case let directory(contents):
                for let child in contents {
                    totalSize += child.totalSize
                }
                break
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        switch self {
            case let file():
                filesCount += 1
                break
            case let directory(contents):
                for let child in contents {
                    filesCount += child.filesCount
                }
                break
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        switch self {
            case let file():
                treeDepth += 0
                break
            case let directory(contents):
                for let child in contents {
                    treeDepth = max(treeDepth, child.treeDepth)
                }
                treeDepth += 1
                break
        }
        return treeDepth
    }
}

// File system manager that calculates 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 let file(size):
                totalSize += size
                break
            case let directory(contents):
                for let child in contents {
                    totalSize += child.totalSize
                }
                break
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        switch self {
            case let file():
                filesCount += 1
                break
            case let directory(contents):
                for let child in contents {
                    filesCount += child.filesCount
                }
                break
        }
        return filesCount
    }

    var treeDepth: Int { get } {
        var treeDepth = 0
        switch self {
            case let file():
                treeDepth += 0
                break
            case let directory(contents):
                for let child in contents {
                    treeDepth = max(treeDepth, child.treeDepth)
                }
                treeDepth += 1
                break
        }
        return treeDepth
    }
}

// File system manager that calculates 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 let file(size):
                totalSize += size
                break
            case let directory(contents):
                for let child in contents {
                    totalSize += child.totalSize
                }
                break
        }
        return totalSize
    }

    var filesCount: Int { get } {
        var filesCount = 0
        switch self {
            case let file():
                filesCount += 1
                break
            case let directory(contents):
                for let child in contents {
                    files

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.insert(at: 0, element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.removeFirst()
    }
}

```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 element to the top of the stack.
    func push(_ element: Element) {
        elements.insert(at: 0, element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.removeFirst()
    }
}

// Stack with integer elements.
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
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            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] = []
    
    // Push element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// Stack of integers.
let stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print("Popped:", stack.pop()) // Output: 3
print("Popped:", stack.pop()) // Output: 2
print("Popped:", stack.pop()) // Output: 1
print("Popped:", stack.pop()) // Output: nil
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            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] = []
    
    // Push element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// 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] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.removeLast()
    }
}

class StackOfInts: StackProtocol {
    // Push integer element to the top of the stack.
    func push(_ element: Int) {
        super.push(element)
    }
    
    // Pop integer element from the top of the stack.
    func pop() -> Int? {
        return super.pop() as? Int
    }
}

class StackOfStrings: StackProtocol {
    // Push string element to the top of the stack.
    func push(_ element: String) {
        super.push(element)
    }
    
    // Pop string element from the top of the stack.
    func pop() -> String? {
        return super.pop() as? String
    }
}

class StackOfFloats: StackProtocol {
    // Push float element to the top of the stack.
    func push(_ element: Float) {
        super.push(element)
    }
    
    // Pop float element from the top of the stack.
    func pop() -> Float? {
        return super.pop() as? Float
    }
}

class StackOfBooleans: StackProtocol {
    // Push boolean element to the top of the stack.
    func push(_ element: Bool) {
        super.push(element)
    }
    
    // Pop boolean element from the top of the stack.
    func pop() -> Bool? {
        return super.pop() as? Bool
    }
}

class StackOfCustom<Element>: StackProtocol {
    // Push custom element to the top of the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop custom element from the top of 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] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        return elements.removeLast()
    }
}

// Stack with integer elements.
class StackOfInts: StackProtocol {
    // Push integer element to the top of the stack.
    func push(_ element: Int) {
        super.push(element)
    }
    
    // Pop integer element from the top of the stack.
    func pop() -> Int? {
        return super.pop() as? Int
    }
}

// Stack with string elements.
class StackOfStrings: StackProtocol {
    // Push string element to the top of the stack.
    func push(_ element: String) {
        super.push(element)
    }
    
    // Pop string element from the top of the stack.
    func pop() -> String? {
        return super.pop() as? String
    }
}

// Stack with float elements.
class StackOfFloats: StackProtocol {
    // Push float element to the top of the stack.
    func push(_ element: Float) {
        super.push(element)
    }
    
    // Pop float element from the top of the stack.
    func pop() -> Float? {
        return super.pop() as? Float
    }
}

// Stack with boolean elements.
class StackOfBooleans: StackProtocol {
    // Push boolean element to the top of the stack.
    func push(_ element: Bool) {
        super.push(element)
    }
    
    // Pop boolean element from the top of the stack.
    func pop() -> Bool? {
        return super.pop() as? Bool
    }
}

// Stack with custom elements.
class StackOfCustom<Element>: StackProtocol {
    // Push custom element to the top of the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop custom element from the top of the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustom<Element>: StackProtocol {
    // Push custom element to the top of the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop custom element from the top of the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustom<Element>: StackProtocol {
    // Push custom element to the top of the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop custom element from the top of the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustom<Element>: StackProtocol {
    // Push custom element to the top of the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop custom element from the top of the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustom<Element>: StackProtocol {
    // Push custom element to the top of the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop custom element from the top of the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustom<Element>: StackProtocol {
    // Push custom element to the top of the stack.
    func push(_ element: Element) {
        super.push(element)
    }
    
    // Pop custom element from the top of the stack.
    func pop() -> Element? {
        return super.pop() as? Element
    }
}

// Stack with custom elements.
class StackOfCustom<Element>: StackProtocol {
    

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop the top element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        let lastIndex = elements.count - 1
        let lastElement = elements[lastIndex]
        elements.removeLast()
        return lastElement
    }
}

```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 element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop the top element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        let lastIndex = elements.count - 1
        let lastElement = elements[lastIndex]
        elements.removeLast()
        return lastElement
    }
}

// Stack of integers.
let stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print(stack.pop()) // Prints 3
print(stack.pop()) // Prints 2
print(stack.pop()) // Prints 1
print(stack.pop()) // Prints nil (stack is empty)

// Stack of strings.
let stack = Stack<String>()
stack.push("apple")
stack.push("banana")
stack.push("cherry")
print(stack.pop()) // Prints "cherry"
print(stack.pop()) // Prints "banana"
print(stack.pop()) // Prints "apple"
print(stack.pop()) // Prints nil (stack is empty)
```

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
        } else {
            let lastIndex = elements.count - 1
            let lastElement = elements[lastIndex]
            elements.removeLast()
            return lastElement
        }
    }
}

```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
        } else {
            let lastIndex = elements.count - 1
            let lastElement = elements[lastIndex]
            elements.removeLast()
            return lastElement
        }
    }
}

// Stack of integers.
let stack = Stack<Int>()
stack.push(1)
stack.push(2)
stack.push(3)
print(stack.pop()) // Prints 3
print(stack.pop()) // Prints 2
print(stack.pop()) // Prints 1
print(stack.pop()) // Prints nil (stack is empty)
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

class FixedSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    var capacity: Int
    
    // Initialize with a fixed capacity.
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        if elements.count == capacity {
            throw Exception("Stack is full")
        } else {
            elements.append(element)
        }
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

class VariableSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

class FixedSizeVariableSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    var capacity: Int
    
    // Initialize with a fixed capacity.
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        if elements.count == capacity {
            throw Exception("Stack is full")
        } else {
            elements.append(element)
        }
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

class VariableSizeFixedSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    var capacity: Int
    
    // Initialize with a variable capacity.
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        if elements.count == capacity {
            throw Exception("Stack is full")
        } else {
            elements.append(element)
        }
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            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] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// Stack with fixed size.
class FixedSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    var capacity: Int
    
    // Initialize with a fixed capacity.
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        if elements.count == capacity {
            throw Exception("Stack is full")
        } else {
            elements.append(element)
        }
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// Stack with variable size.
class VariableSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// Stack with a fixed capacity and variable size.
class FixedSizeVariableSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    var capacity: Int
    
    // Initialize with a fixed capacity.
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        if elements.count == capacity {
            throw Exception("Stack is full")
        } else {
            elements.append(element)
        }
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// Stack with a variable capacity and fixed size.
class VariableSizeFixedSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    var capacity: Int
    
    // Initialize with a variable capacity.
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        if elements.count == capacity {
            throw Exception("Stack is full")
        } else {
            elements.append(element)
        }
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// Stack with a variable capacity and variable size.
class VariableSizeVariableSizeStack<Element>: StackProtocol {
    var elements: [Element] = []
    var capacity: Int
    
    // Initialize with a variable capacity.
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    // Push element to the top of the stack.
    func push(_ element: Element) {
        if elements.count == capacity {
            throw Exception("Stack is full")
        } else {
            elements.append(element)
        }
    }
    
    // Pop element from the top of the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        } else {
            let element = elements.last!
            elements.removeLast()
            return element

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        
        let lastIndex = elements.count - 1
        let lastElement = elements[lastIndex]
        elements.removeLast()
        return lastElement
    }
}

class StackOfInts: StackProtocol {
    // Push integer to the stack.
    func push(_ element: Int) {
        super.push(element)
    }
    
    // Pop integer from the stack.
    func pop() -> Int? {
        return super.pop()
    }
}

class StackOfStrings: StackProtocol {
    // Push string to the stack.
    func push(_ element: String) {
        super.push(element)
    }
    
    // Pop string from the stack.
    func pop() -> String? {
        return super.pop()
    }
}

class StackOfAny: StackProtocol {
    // Push any to the stack.
    func push(_ element: Any) {
        super.push(element)
    }
    
    // Pop any from the stack.
    func pop() -> Any? {
        return super.pop()
    }
}

class StackOfMixed: StackProtocol {
    // Push mixed to the stack.
    func push(_ element: Mixed) {
        super.push(element)
    }
    
    // Pop mixed from the stack.
    func pop() -> Mixed? {
        return super.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 element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        if elements.isEmpty {
            return nil
        }
        
        let lastIndex = elements.count - 1
        let lastElement = elements[lastIndex]
        elements.removeLast()
        return lastElement
    }
}

// Stack with integer elements.
class StackOfInts: StackProtocol {
    // Push integer to the stack.
    func push(_ element: Int) {
        super.push(element)
    }
    
    // Pop integer from the stack.
    func pop() -> Int? {
        return super.pop()
    }
}

// Stack with string elements.
class StackOfStrings: StackProtocol {
    // Push string to the stack.
    func push(_ element: String) {
        super.push(element)
    }
    
    // Pop string from the stack.
    func pop() -> String? {
        return super.pop()
    }
}

// Stack with any elements.
class StackOfAny: StackProtocol {
    // Push any to the stack.
    func push(_ element: Any) {
        super.push(element)
    }
    
    // Pop any from the stack.
    func pop() -> Any? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfMixed: StackProtocol {
    // Push mixed to the stack.
    func push(_ element: Mixed) {
        super.push(element)
    }
    
    // Pop mixed from the stack.
    func pop() -> Mixed? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfAny: StackProtocol {
    // Push any to the stack.
    func push(_ element: Any) {
        super.push(element)
    }
    
    // Pop any from the stack.
    func pop() -> Any? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfMixed: StackProtocol {
    // Push mixed to the stack.
    func push(_ element: Mixed) {
        super.push(element)
    }
    
    // Pop mixed from the stack.
    func pop() -> Mixed? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfAny: StackProtocol {
    // Push any to the stack.
    func push(_ element: Any) {
        super.push(element)
    }
    
    // Pop any from the stack.
    func pop() -> Any? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfMixed: StackProtocol {
    // Push mixed to the stack.
    func push(_ element: Mixed) {
        super.push(element)
    }
    
    // Pop mixed from the stack.
    func pop() -> Mixed? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfAny: StackProtocol {
    // Push any to the stack.
    func push(_ element: Any) {
        super.push(element)
    }
    
    // Pop any from the stack.
    func pop() -> Any? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfMixed: StackProtocol {
    // Push mixed to the stack.
    func push(_ element: Mixed) {
        super.push(element)
    }
    
    // Pop mixed from the stack.
    func pop() -> Mixed? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfAny: StackProtocol {
    // Push any to the stack.
    func push(_ element: Any) {
        super.push(element)
    }
    
    // Pop any from the stack.
    func pop() -> Any? {
        return super.pop()
    }
}

// Stack with mixed elements.
class StackOfMixed: StackProtocol {
    // Push mixed to the stack.
    func push(_ element: Mixed) {
        super.push(element)

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
        } else {
            let element = elements.last!
            elements.removeLast()
            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] = []
    
    // 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
        } else {
            let element = elements.last!
            elements.removeLast()
            return element
        }
    }
}

// Stack of integers.
var 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 (stack is empty)
```

protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

class Stack<Element>: StackProtocol {
    var elements: [Element] = []
    
    // Push element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        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 element to the stack.
    func push(_ element: Element) {
        elements.append(element)
    }
    
    // Pop element from the stack.
    func pop() -> Element? {
        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 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 _evicted: Int
    var _hits: Int
    var _misses: Int

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self._evicted = 0
        self._hits = 0
        self._misses = 0
    }

    func get(_ key: Key) -> Element? {
        self._hits += 1
        return cache[key]
    }

    func set(_ key: Key, _ value: Element) {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
        } else {
            if cache.count == capacity {
                let evicted = queue.dequeue()
                cache.remove(evicted)
                self._evicted += 1
            }
            queue.add(key)
            cache[key] = value
        }
    }

    func stats() -> String {
        return "Cache stats:\n"
        + "  Capacity: $capacity\n"
        + "  Evicted: $evicted\n"
        + "  Hits: $hits\n"
        + "  Misses: $misses\n"
    }
}

```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 _evicted: Int
    var _hits: Int
    var _misses: Int

    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self._evicted = 0
        self._hits = 0
        self._misses = 0
    }

    func get(_ key: Key) -> Element? {
        self._hits += 1
        return cache[key]
    }

    func set(_ key: Key, _ value: Element) {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
        } else {
            if cache.count == capacity {
                let evicted = queue.dequeue()
                cache.remove(evicted)
                self._evicted += 1
            }
            queue.add(key)
            cache[key] = value
        }
    }

    func stats() -> String {
        return "Cache stats:\n"
        + "  Capacity: $capacity\n"
        + "  Evicted: $evicted\n"
        + "  Hits: $hits\n"
        + "  Misses: $misses\n"
    }
}
```

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
    
    // Initialize the cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    // Get an element from the cache.
    func get(key: Key) -> Element? {
        if let value = self.cache[key] {
            self.queue.remove(key)
            self.queue.insert(key)
            return value
        }
        return nil
    }
    
    // Set an element in the cache.
    func set(key: Key, value: Element) {
        if self.counter < self.capacity {
            self.cache[key] = value
            self.queue.insert(key)
            self.counter += 1
        } else {
            let keyToRemove = self.queue.dequeue()
            self.cache.remove(keyToRemove)
            self.cache[key] = value
            self.queue.insert(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 counter: Int
    
    // Initialize the cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    // Get an element from the cache.
    func get(key: Key) -> Element? {
        if let value = self.cache[key] {
            self.queue.remove(key)
            self.queue.insert(key)
            return value
        }
        return nil
    }
    
    // Set an element in the cache.
    func set(key: Key, value: Element) {
        if self.counter < self.capacity {
            self.cache[key] = value
            self.queue.insert(key)
            self.counter += 1
        } else {
            let keyToRemove = self.queue.dequeue()
            self.cache.remove(keyToRemove)
            self.cache[key] = value
            self.queue.insert(key)
        }
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 5)
cache["key1"] = 1
cache["key2"] = 2
cache["key3"] = 3
cache["key4"] = 4
cache["key5"] = 5
cache["key6"] = 6 // This should remove "key1" because the cache is full.
print(cache["key2"]) // Prints 2
print(cache["key3"]) // Prints 3
print(cache["key4"]) // Prints 4
print(cache["key5"]) // Prints 5
print(cache["key6"]) // Prints 6
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: Map<Key, Element> = Map()
    private var lru: Deque<Key> = Deque()
    private var size: Int = 0
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    override func subscript(key: Key) -> Element? {
        let element = cache[key]
        if element != nil {
            lru.remove(key)
            lru.push(key)
            return element
        }
        return nil
    }
    
    override func set(key: Key, element: Element) {
        if let value = cache[key] {
            lru.remove(key)
            lru.push(key)
            cache[key] = element
            return
        }
        if size == capacity {
            let evictedKey = lru.pop()
            cache.remove(evictedKey)
            size -= 1
        }
        lru.push(key)
        cache[key] = element
        size += 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 {
    private var capacity: Int
    private var cache: Map<Key, Element> = Map()
    private var lru: Deque<Key> = Deque()
    private var size: Int = 0
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    override func subscript(key: Key) -> Element? {
        let element = cache[key]
        if element != nil {
            lru.remove(key)
            lru.push(key)
            return element
        }
        return nil
    }
    
    override func set(key: Key, element: Element) {
        if let value = cache[key] {
            lru.remove(key)
            lru.push(key)
            cache[key] = element
            return
        }
        if size == capacity {
            let evictedKey = lru.pop()
            cache.remove(evictedKey)
            size -= 1
        }
        lru.push(key)
        cache[key] = element
        size += 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
    
    // Initialize the cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    // Get an element from the cache by key.
    // If the element is not found, returns nil.
    func get(key: Key) -> Element? {
        let element = cache[key]
        if let element = cache[key] {
            queue.remove(element: element)
            queue.add(element: key)
            return element
        } else {
            return nil
        }
    }
    
    // Set an element in the cache.
    // If the element already exists, updates its value.
    // If the cache is full, removes the least recently used item to make space for the new item.
    func set(key: Key, element: Element) {
        if let element = cache[key] {
            queue.remove(element: element)
        }
        cache[key] = element
        queue.add(element: key)
        counter += 1
        if counter > capacity {
            let leastRecentlyUsedKey = queue.dequeueFirst()
            cache.remove(leastRecentlyUsedKey)
            counter -= 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 counter: Int
    
    // Initialize the cache with the specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.counter = 0
    }
    
    // Get an element from the cache by key.
    // If the element is not found, returns nil.
    func get(key: Key) -> Element? {
        let element = cache[key]
        if let element = cache[key] {
            queue.remove(element: element)
            queue.add(element: key)
            return element
        } else {
            return nil
        }
    }
    
    // Set an element in the cache.
    // If the element already exists, updates its value.
    // If the cache is full, removes the least recently used item to make space for the new item.
    func set(key: Key, element: Element) {
        if let element = cache[key] {
            queue.remove(element: element)
        }
        cache[key] = element
        queue.add(element: key)
        counter += 1
        if counter > capacity {
            let leastRecentlyUsedKey = queue.dequeueFirst()
            cache.remove(leastRecentlyUsedKey)
            counter -= 1
        }
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 5)
cache.set("apple", 1)
cache.set("banana", 2)
cache.set("cherry", 3)
print(cache.get("apple")) // prints 1
print(cache.get("banana")) // prints 2
cache.set("date", 4)
print(cache.get("cherry")) // prints nil
print(cache.get("date")) // 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 size: Int
    
    // Initializes a new cache with a specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.size = 0
    }
    
    // Adds a new entry to the cache.
    // If the entry already exists, it is moved to the back of the queue.
    // If the cache is full, the least recently used entry is evicted.
    func set(element: Element, forKey: Key) {
        if let cachedElement = cache[forKey] {
            queue.remove(cachedElement)
        } else if size == capacity {
            let evictedKey = queue.dequeue()
            cache.remove(evictedKey)
        }
        cache[forKey] = element
        queue.enqueue(forKey)
        size += 1
    }
    
    // Returns the element associated with the given key, or nil if the key is not found.
    func subscript(forKey: Key) -> Element? {
        if let cachedElement = cache[forKey] {
            queue.remove(cachedElement)
            queue.enqueue(forKey)
            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 size: Int
    
    // Initializes a new cache with a specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.size = 0
    }
    
    // Adds a new entry to the cache.
    // If the entry already exists, it is moved to the back of the queue.
    // If the cache is full, the least recently used entry is evicted.
    func set(element: Element, forKey: Key) {
        if let cachedElement = cache[forKey] {
            queue.remove(cachedElement)
        } else if size == capacity {
            let evictedKey = queue.dequeue()
            cache.remove(evictedKey)
        }
        cache[forKey] = element
        queue.enqueue(forKey)
        size += 1
    }
    
    // Returns the element associated with the given key, or nil if the key is not found.
    func subscript(forKey: Key) -> Element? {
        if let cachedElement = cache[forKey] {
            queue.remove(cachedElement)
            queue.enqueue(forKey)
            return cachedElement
        }
        return nil
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 5)
cache.set(element: 1, forKey: "key1")
cache.set(element: 2, forKey: "key2")
cache.set(element: 3, forKey: "key3")
cache.set(element: 4, forKey: "key4")
cache.set(element: 5, forKey: "key5")
cache.set(element: 6, forKey: "key6") // This should evict "key1"

print(cache.subscript("key2")) // Prints 2
print(cache.subscript("key3")) // Prints 3
print(cache.subscript("key4")) // Prints 4
print(cache.subscript("key5")) // Prints 5
print(cache.subscript("key6")) // Prints 6
```

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 a specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary<Key, Element>()
        self.queue = Queue<Key>()
        self.count = 0
    }
    
    // Adds a new entry to the cache. If the cache is at capacity, the least recently used entry is evicted to make space for the new entry.
    func add(key: Key, element: Element) {
        if let existing = self.cache[key] {
            self.queue.remove(existing)
            self.count -= 1
        } else if self.count == self.capacity {
            let evictedKey = self.queue.dequeue()
            self.cache.remove(evictedKey)
            self.count -= 1
        }
        self.cache[key] = element
        self.queue.enqueue(key)
        self.count += 1
    }
    
    // Returns the element associated with the specified key, or nil if the key is not in the cache.
    func lookup(key: Key) -> Element? {
        if let existing = self.cache[key] {
            self.queue.remove(existing)
            self.queue.enqueue(key)
            return existing
        }
        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 count: Int
    
    // Initializes a new cache with a specified capacity.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary<Key, Element>()
        self.queue = Queue<Key>()
        self.count = 0
    }
    
    // Adds a new entry to the cache. If the cache is at capacity, the least recently used entry is evicted to make space for the new entry.
    func add(key: Key, element: Element) {
        if let existing = self.cache[key] {
            self.queue.remove(existing)
            self.count -= 1
        } else if self.count == self.capacity {
            let evictedKey = self.queue.dequeue()
            self.cache.remove(evictedKey)
            self.count -= 1
        }
        self.cache[key] = element
        self.queue.enqueue(key)
        self.count += 1
    }
    
    // Returns the element associated with the specified key, or nil if the key is not in the cache.
    func lookup(key: Key) -> Element? {
        if let existing = self.cache[key] {
            self.queue.remove(existing)
            self.queue.enqueue(key)
            return existing
        }
        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)
cache.add("key6", 6) // This should evict "key1"

// Accessing elements:
print(cache.lookup("key2")) // Output: 2
print(cache.lookup("key3")) // Output: 3
```

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
    var maxCacheSize: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.cacheSize = 0
        self.evictions = 0
        self.maxCacheSize = 0
    }
    
    // Returns the element associated with the given key, or nil if the key is not found.
    func subscript(key: Key) -> Element? {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
            return value
        } else {
            return nil
        }
    }
    
    // Associates the given key with the given element in the cache.
    // If the cache is full, it will remove the least recently used item to make space for the new entry.
    func set(key: Key, element: Element) {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
            cache[key] = element
        } else {
            if cacheSize < capacity {
                cache[key] = element
                queue.add(key)
                cacheSize += 1
            } else {
                let evictedKey = queue.dequeue()
                cache.remove(evictedKey)
                cache[key] = element
                queue.add(key)
            }
        }
    }
    
    // Returns the number of items in the cache.
    func count() -> Int {
        return cacheSize
    }
    
    // Returns the maximum capacity of the cache.
    func maxCapacity() -> Int {
        return capacity
    }
    
    // Returns the number of times the cache has been evicted.
    func evictionsCount() -> Int {
        return 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
    var maxCacheSize: Int
    
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.cacheSize = 0
        self.evictions = 0
        self.maxCacheSize = 0
    }
    
    // Returns the element associated with the given key, or nil if the key is not found.
    func subscript(key: Key) -> Element? {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
            return value
        } else {
            return nil
        }
    }
    
    // Associates the given key with the given element in the cache.
    // If the cache is full, it will remove the least recently used item to make space for the new entry.
    func set(key: Key, element: Element) {
        if let value = cache[key] {
            queue.remove(key)
            queue.add(key)
            cache[key] = element
        } else {
            if cacheSize < capacity {
                cache[key] = element
                queue.add(key)
                cacheSize += 1
            } else {
                let evictedKey = queue.dequeue()
                cache.remove(evictedKey)
                cache[key] = element
                queue.add(key)
            }
        }
    }
    
    // Returns the number of items in the cache.
    func count() -> Int {
        return cacheSize
    }
    
    // Returns the maximum capacity of the cache.
    func maxCapacity() -> Int {
        return capacity
    }
    
    // Returns the number of times the cache has been evicted.
    func evictionsCount() -> Int {
        return evictions
    }
}
```

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Element>: CacheProtocol {
    private var capacity: Int
    private var cache: Map<Key, Element> = Map()
    private var order: LinkedList<Key> = LinkedList()
    private var _size: Int = 0
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    override var size: Int { return _size }
    
    override func contains(key: Key) -> Bool {
        return cache.contains(key: key)
    }
    
    override func get(key: Key) -> Element? {
        let value = cache[key]
        if value != nil {
            order.remove(key)
            order.addLast(key)
        }
        return value
    }
    
    override func set(key: Key, value: Element) {
        if cache.contains(key: key) {
            order.remove(key)
            order.addLast(key)
            cache[key] = value
        } else {
            if _size == capacity {
                let oldestKey = order.first
                order.removeFirst()
                cache.remove(oldestKey)
                _size -= 1
            }
            order.addLast(key)
            cache[key] = value
            _size += 1
        }
    }
    
    override func remove(key: Key) {
        if cache.contains(key: key) {
            order.remove(key)
            cache.remove(key)
            _size -= 1
        }
    }
    
    override func clear() {
        order.clear()
        cache.clear()
        _size = 0
    }
    
    override func keys() -> [Key] {
        return order.allKeys
    }
    
    override func values() -> [Element] {
        return order.allValues
    }
    
    override func entries() -> [[Key, Element]] {
        return order.allPairs
    }
}

```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 {
    private var capacity: Int
    private var cache: Map<Key, Element> = Map()
    private var order: LinkedList<Key> = LinkedList()
    private var _size: Int = 0
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    override var size: Int { return _size }
    
    override func contains(key: Key) -> Bool {
        return cache.contains(key: key)
    }
    
    override func get(key: Key) -> Element? {
        let value = cache[key]
        if value != nil {
            order.remove(key)
            order.addLast(key)
        }
        return value
    }
    
    override func set(key: Key, value: Element) {
        if cache.contains(key: key) {
            order.remove(key)
            order.addLast(key)
            cache[key] = value
        } else {
            if _size == capacity {
                let oldestKey = order.first
                order.removeFirst()
                cache.remove(oldestKey)
                _size -= 1
            }
            order.addLast(key)
            cache[key] = value
            _size += 1
        }
    }
    
    override func remove(key: Key) {
        if cache.contains(key: key) {
            order.remove(key)
            cache.remove(key)
            _size -= 1
        }
    }
    
    override func clear() {
        order.clear()
        cache.clear()
        _size = 0
    }
    
    override func keys() -> [Key] {
        return order.allKeys
    }
    
    override func values() -> [Element] {
        return order.allValues
    }
    
    override func entries() -> [[Key, Element]] {
        return order.allPairs
    }
}
```

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 evict: Bool
    var _evictCount: Int
    var _evictLimit: Int
    var _evictThreshold: Int
    var _evictThresholdCount: Int
    var _evictThresholdLimit: Int
    var _evictThresholdTime: Double
    var _evictThresholdTimeLimit: Double
    var _evictThresholdTimeCount: Int
    var _evictThresholdTimeLimitCount: Int
    var _evictThresholdTimeLimitThreshold: Double
    var _evictThresholdTimeLimitThresholdCount: Int
    var _evictThresholdTimeLimitThresholdLimit: Double
    var _evictThresholdTimeLimitThresholdLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThreshold: Double
    var _evictThresholdTimeLimitThresholdLimitThresholdCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimit: Double
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimit: Double
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimit: Double
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimit: Double
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimit: Double
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitCount: Int
    var _evictThresholdTimeLimitThresholdLimitThresholdLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimitLimit

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 maxCacheSize: Int
    
    // Initializes a new cache with the specified capacity.
    // The cache will be able to hold up to capacity entries.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.cacheSize = 0
        self.maxCacheSize = capacity
    }
    
    // Returns the number of entries currently in the cache.
    func count -> Int {
        return self.cache.count
    }
    
    // Returns the maximum number of entries that can be stored in the cache.
    func maxCount -> Int {
        return self.maxCacheSize
    }
    
    // Returns the current capacity limit of the cache.
    func capacityLimit -> Int {
        return self.capacity
    }
    
    // Returns the current size of the cache.
    func size -> Int {
        return self.cacheSize
    }
    
    // Returns true if the cache is full, false otherwise.
    func isFull -> Bool {
        return self.cacheSize == self.capacity
    }
    
    // Returns true if the cache is empty, false otherwise.
    func isEmpty -> Bool {
        return self.cacheSize == 0
    }
    
    // Adds an entry to the cache with the specified key and value.
    // If the cache is full, the least recently used entry will be removed to make space for the new entry.
    func add(key: Key, value: Element) {
        if let existingValue = self[key] {
            self.queue.remove(existingValue)
        } else if self.isFull {
            let leastRecentlyUsedKey = self.queue.dequeueFirst()
            self.cache.remove(leastRecentlyUsedKey)
        }
        self.queue.enqueue(key)
        self.cache[key] = value
        self.cacheSize += 1
    }
    
    // Returns the value associated with the specified key, or nil if the key is not found in the cache.
    func subscript(key: Key) -> Element? {
        if let value = self.cache[key] {
            self.queue.remove(key)
            self.queue.enqueue(key)
            return value
        } else {
            return nil
        }
    }
    
    // Removes the entry associated with the specified key from the cache.
    // Returns true if the entry was successfully removed, false otherwise.
    func remove(key: Key) -> Bool {
        if let value = self.cache[key] {
            self.queue.remove(key)
            self.cache.remove(key)
            self.cacheSize -= 1
            return true
        } else {
            return false
        }
    }
    
    // Clears the entire cache, removing all entries.
    func clear() {
        self.cache.clear()
        self.queue.clear()
        self.cacheSize = 0
    }
    
    // Returns a string representation of the cache.
    func description -> String {
        return "Cache(capacity: $capacity, cacheSize: $cacheSize, maxCacheSize: $maxCacheSize, queue: $queue, cache: $cache)"
    }
}

```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 maxCacheSize: Int
    
    // Initializes a new cache with the specified capacity.
    // The cache will be able to hold up to capacity entries.
    init(capacity: Int) {
        self.capacity = capacity
        self.cache = Dictionary()
        self.queue = Queue()
        self.cacheSize = 0
        self.maxCacheSize = capacity
    }
    
    // Returns the number of entries currently in the cache.
    func count -> Int {
        return self.cache.count
    }
    
    // Returns the maximum number of entries that can be stored in the cache.
    func maxCount -> Int {
        return self.maxCacheSize
    }
    
    // Returns the current capacity limit of the cache.
    func capacityLimit -> Int {
        return self.capacity
    }
    
    // Returns the current size of the cache.
    func size -> Int {
        return self.cacheSize
    }
    
    // Returns true if the cache is full, false otherwise.
    func isFull -> Bool {
        return self.cacheSize == self.capacity
    }
    
    // Returns true if the cache is empty, false otherwise.
    func isEmpty -> Bool {
        return self.cacheSize == 0
    }
    
    // Adds an entry to the cache with the specified key and value.
    // If the cache is full, the least recently used entry will be removed to make space for the new entry.
    func add(key: Key, value: Element) {
        if let existingValue = self[key] {
            self.queue.remove(existingValue)
        } else if self.isFull {
            let leastRecentlyUsedKey = self.queue.dequeueFirst()
            self.cache.remove(leastRecentlyUsedKey)
        }
        self.queue.enqueue(key)
        self.cache[key] = value
        self.cacheSize += 1
    }
    
    // Returns the value associated with the specified key, or nil if the key is not found in the cache.
    func subscript(key: Key) -> Element? {
        if let value = self.cache[key] {
            self.queue.remove(key)
            self.queue.enqueue(key)
            return value
        } else {
            return nil
        }
    }
    
    // Removes the entry associated with the specified key from the cache.
    // Returns true if the entry was successfully removed, false otherwise.
    func remove(key: Key) -> Bool {
        if let value = self.cache[key] {
            self.queue.remove(key)
            self.cache.remove(key)
            self.cacheSize -= 1
            return true
        } else {
            return false
        }
    }
    
    // Clears the entire cache, removing all entries.
    func clear() {
        self.cache.clear()
        self.queue.clear()
        self.cacheSize = 0
    }
    
    // Returns a string representation of the cache.
    func description -> String {
        return "Cache(capacity: $capacity, cacheSize: $cacheSize, maxCacheSize: $maxCacheSize, queue: $queue, cache: $cache)"
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 5)

// Add entries to the cache
cache.add("apple", 1)
cache.add("banana", 2)
cache.add("cherry", 3)
cache.add("date", 4)
cache.add("elderberry", 5)

// Access entries in the cache
print("apple: \(cache["apple"])")
print("banana: \(cache["banana"])
print("cherry: \(cache["cherry"])
print("date: \(cache["date"])
print("elderberry: \(cache["elderberry"])

// Remove an entry from the cache
cache.remove("banana")

// Access entries in the cache again
print("apple: \(cache["apple"])")
print("cherry: \(cache["cherry"])
print("date: \(cache["date"])
print("elderberry: \(cache["elderberry"])

// Clear the cache
cache.clear()

// Access entries in the cache after clearing
print("apple:

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: Dictionary<Key, TimeInterval> = Dictionary()
    var _expirationPolicy: ExpirationPolicy = ExpirationPolicy()

    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
        _expirationPolicy.put(key, expiration)
    }

    func get(key: Key) -> Value? {
        let value = _cache[key]
        if let expiration = _expiration[key] {
            if expiration <= TimeInterval(0) {
                _cache.remove(key)
                _expiration.remove(key)
                _expirationPolicy.remove(key)
            } else {
                _expirationPolicy.put(key, expiration)
            }
        }
        return value
    }
}

class ExpirationPolicy {
    var _expirationQueue: Queue<Key> = Queue()

    func put(key: Key, expiration: TimeInterval) {
        _expirationQueue.enqueue(key)
        _expirationQueue.dequeue()
    }

    func remove(key: Key) {
        _expirationQueue.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: Dictionary<Key, Value> = Dictionary()
    var _expiration: Dictionary<Key, TimeInterval> = Dictionary()
    var _expirationPolicy: ExpirationPolicy = ExpirationPolicy()

    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
        _expirationPolicy.put(key, expiration)
    }

    func get(key: Key) -> Value? {
        let value = _cache[key]
        if let expiration = _expiration[key] {
            if expiration <= TimeInterval(0) {
                _cache.remove(key)
                _expiration.remove(key)
                _expirationPolicy.remove(key)
            } else {
                _expirationPolicy.put(key, expiration)
            }
        }
        return value
    }
}

// Expiration policy.
class ExpirationPolicy {
    var _expirationQueue: Queue<Key> = Queue()

    func put(key: Key, expiration: TimeInterval) {
        _expirationQueue.enqueue(key)
        _expirationQueue.dequeue()
    }

    func remove(key: Key) {
        _expirationQueue.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: Dictionary<Key, TimeInterval> = Dictionary()
    var _expirationPolicy: ExpirationPolicy = ExpirationPolicy.FIFO
    var _expirationPolicyQueue: Queue<Key> = Queue()
    var _expirationPolicyQueueLock: Lock = Lock()
    var _expirationPolicyQueueLock: Lock = Lock()
    var _lock: Lock = Lock()
    
    // Initialize cache with a given expiration policy.
    init(expirationPolicy: ExpirationPolicy) {
        self.expirationPolicy = expirationPolicy
    }
    
    // Set expiration policy for the cache.
    var expirationPolicy: ExpirationPolicy
    
    // Put a value with a given key and expiration time into the cache.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        guard _lock.lock() else { return }
        _cache[key] = value
        _expiration[key] = expiration
        _expirationPolicyQueueLock.lock()
        if _expirationPolicy == ExpirationPolicy.FIFO {
            _expirationPolicyQueue.enqueue(key)
        } else {
            _expirationPolicyQueue.enqueueLast(key)
        }
        _expirationPolicyQueueLock.unlock()
        _lock.unlock()
    }
    
    // Get a value with a given key from the cache.
    func get(key: Key) -> Value? {
        guard _lock.lock() else { return nil }
        if let value = _cache[key] {
            if let expiration = _expiration[key] {
                if expiration > 0 {
                    guard _expirationPolicyQueueLock.lock() else { return nil }
                    if _expirationPolicy == ExpirationPolicy.FIFO {
                        _expirationPolicyQueue.dequeue()
                    } else {
                        _expirationPolicyQueue.dequeueFirst()
                    }
                    _expirationPolicyQueueLock.unlock()
                    _expiration[key] -= expiration
                    if _expiration[key] <= 0 {
                        _expiration.remove(key)
                        _cache.remove(key)
                    } else {
                        _expirationPolicyQueueLock.lock()
                        if _expirationPolicy == ExpirationPolicy.FIFO {
                            _expirationPolicyQueue.enqueue(key)
                        } else {
                            _expirationPolicyQueue.enqueueLast(key)
                        }
                        _expirationPolicyQueueLock.unlock()
                    }
                }
                guard _lock.lock() else { return nil }
                return value
            }
        }
        guard _lock.lock() else { return nil }
        return nil
    }
    
    // Remove a value with a given key from the cache.
    func remove(key: Key) {
        guard _lock.lock() else { return }
        _expiration.remove(key)
        _cache.remove(key)
        guard _lock.lock() else { return }
    }
    
    // Clear the cache.
    func clear() {
        guard _lock.lock() else { return }
        _cache = Dictionary()
        _expiration = Dictionary()
        guard _lock.lock() else { return }
    }
    
    // Get the size of the cache.
    func size() -> Int {
        guard _lock.lock() else { return 0 }
        var size = 0
        for _ in _cache {
            size += 1
        }
        guard _lock.lock() else { return 0 }
        return size
    }
    
    // Get the number of expired values in the cache.
    func expiredCount() -> Int {
        guard _lock.lock() else { return 0 }
        var count = 0
        for key, value in _cache {
            if let expiration = _expiration[key] {
                if expiration > 0 {
                    count += 1
                }
            }
        }
        guard _lock.lock() else { return 0 }
        return count
    }
}

enum ExpirationPolicy: Comparable {
    case FIFO
    case LIFO
    case TTL
}

```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 = ExpirationPolicy.FIFO
    var _expirationPolicyQueue: Queue<Key> = Queue()
    var _expirationPolicyQueueLock: Lock = Lock()
    var _expirationPolicyQueueLock: Lock = Lock()
    var _lock: Lock = Lock()
    
    // Initialize cache with a given expiration policy.
    init(expirationPolicy: ExpirationPolicy) {
        self.expirationPolicy = expirationPolicy
    }
    
    // Set expiration policy for the cache.
    var expirationPolicy: ExpirationPolicy
    
    // Put a value with a given key and expiration time into the cache.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        guard _lock.lock() else { return }
        _cache[key] = value
        _expiration[key] = expiration
        _expirationPolicyQueueLock.lock()
        if _expirationPolicy == ExpirationPolicy.FIFO {
            _expirationPolicyQueue.enqueue(key)
        } else {
            _expirationPolicyQueue.enqueueLast(key)
        }
        _expirationPolicyQueueLock.unlock()
        _lock.unlock()
    }
    
    // Get a value with a given key from the cache.
    func get(key: Key) -> Value? {
        guard _lock.lock() else { return nil }
        if let value = _cache[key] {
            if let expiration = _expiration[key] {
                if expiration > 0 {
                    guard _expirationPolicyQueueLock.lock() else { return nil }
                    if _expirationPolicy == ExpirationPolicy.FIFO {
                        _expirationPolicyQueue.dequeue()
                    } else {
                        _expirationPolicyQueue.dequeueFirst()
                    }
                    _expirationPolicyQueueLock.unlock()
                    _expiration[key] -= expiration
                    if _expiration[key] <= 0 {
                        _expiration.remove(key)
                        _cache.remove(key)
                    } else {
                        _expirationPolicyQueueLock.lock()
                        if _expirationPolicy == ExpirationPolicy.FIFO {
                            _expirationPolicyQueue.enqueue(key)
                        } else {
                            _expirationPolicyQueue.enqueueLast(key)
                        }
                        _expirationPolicyQueueLock.unlock()
                    }
                }
                guard _lock.lock() else { return nil }
                return value
            }
        }
        guard _lock.lock() else { return nil }
        return nil
    }
    
    // Remove a value with a given key from the cache.
    func remove(key: Key) {
        guard _lock.lock() else { return }
        _expiration.remove(key)
        _cache.remove(key)
        guard _lock.lock() else { return }
    }
    
    // Clear the cache.
    func clear() {
        guard _lock.lock() else { return }
        _cache = Dictionary()
        _expiration = Dictionary()
        guard _lock.lock() else { return }
    }
    
    // Get the size of the cache.
    func size() -> Int {
        guard _lock.lock() else { return 0 }
        var size = 0
        for _ in _cache {
            size += 1
        }
        guard _lock.lock() else { return 0 }
        return size
    }
    
    // Get the number of expired values in the cache.
    func expiredCount() -> Int {
        guard _lock.lock() else { return 0 }
        var count = 0
        for key, value in _cache {
            if let expiration = _expiration[key] {
                if expiration > 0 {
                    count += 1
                }
            }
        }
        guard _lock.lock() else { return 0 }
        return count
    }
}

// Expiration policy for the cache.
enum ExpirationPolicy: Comparable {
    case FIFO
    case LIFO
    case TTL
}

// Helper class for managing a queue of keys.
class Queue<Key>: Iterable {
    var _queue: [Key] = []
    var _lock: Lock = Lock()
    
    // Add a key to the queue.
    func enqueue(key: Key) {
        guard _lock.lock() else { return }

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>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    var _expirationPolicy: ExpirationPolicy<Key, Value>

    init() {
        _cache = Dictionary()
        _expiration = Dictionary()
        _evictionPolicy = LRU(capacity: 100)
        _expirationPolicy = NeverExpire()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
        _evictionPolicy.put(key, value)
        _expirationPolicy.put(key, expiration)
    }

    func get(key: Key) -> Value? {
        let value = _cache[key]
        if value != nil {
            _evictionPolicy.put(key, value)
            _expirationPolicy.put(key, _expiration[key])
        }
        return value
    }

    func remove(key: Key) {
        _cache.remove(key)
        _expiration.remove(key)
        _evictionPolicy.remove(key)
        _expirationPolicy.remove(key)
    }
}

protocol EvictionPolicy<Key: Hashable, Value> {
    func put(key: Key, value: Value)
    func remove(key: Key)
}

class LRU<Key: Hashable, Value>: EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _queue: Queue<Key>

    init() {
        _cache = Dictionary()
        _queue = Queue()
    }

    func put(key: Key, value: Value) {
        if _cache.contains(key) {
            _queue.remove(key)
        }
        _queue.add(key)
        _cache[key] = value
    }

    func remove(key: Key) {
        _queue.remove(key)
        _cache.remove(key)
    }
}

protocol ExpirationPolicy<Key: Hashable, Value> {
    func put(key: Key, expiration: TimeInterval)
    func remove(key: Key)
}

class NeverExpire<Key: Hashable, Value>: ExpirationPolicy<Key, Value> {
    func put(_ key: Key, _ expiration: TimeInterval) {}
    func remove(_ key: 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: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    var _expirationPolicy: ExpirationPolicy<Key, Value>

    init() {
        _cache = Dictionary()
        _expiration = Dictionary()
        _evictionPolicy = LRU(capacity: 100)
        _expirationPolicy = NeverExpire()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
        _evictionPolicy.put(key, value)
        _expirationPolicy.put(key, expiration)
    }

    func get(key: Key) -> Value? {
        let value = _cache[key]
        if value != nil {
            _evictionPolicy.put(key, value)
            _expirationPolicy.put(key, _expiration[key])
        }
        return value
    }

    func remove(key: Key) {
        _cache.remove(key)
        _expiration.remove(key)
        _evictionPolicy.remove(key)
        _expirationPolicy.remove(key)
    }
}

// Eviction policy based on LRU.
// Evicts the least recently used key.
protocol EvictionPolicy<Key: Hashable, Value> {
    func put(key: Key, value: Value)
    func remove(key: Key)
}

class LRU<Key: Hashable, Value>: EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _queue: Queue<Key>

    init() {
        _cache = Dictionary()
        _queue = Queue()
    }

    func put(key: Key, value: Value) {
        if _cache.contains(key) {
            _queue.remove(key)
        }
        _queue.add(key)
        _cache[key] = value
    }

    func remove(key: Key) {
        _queue.remove(key)
        _cache.remove(key)
    }
}

// Expiration policy based on time.
// Evicts the key that has expired.
protocol ExpirationPolicy<Key: Hashable, Value> {
    func put(key: Key, expiration: TimeInterval)
    func remove(key: Key)
}

class NeverExpire<Key: Hashable, Value>: ExpirationPolicy<Key, Value> {
    func put(_ key: Key, _ expiration: TimeInterval) {}
    func remove(_ key: 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: Map<Key, (Value, TimeInterval)>
    var _expiration: TimeInterval
    var _expirationTimer: Timer
    
    init(expiration: TimeInterval) {
        _cache = Map<Key, (Value, TimeInterval)>()
        _expiration = expiration
        _expirationTimer = Timer()
        _expirationTimer.schedule(repeating: true, interval: expiration) {
            self.evictExpired()
        }
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = (value, expiration)
    }
    
    func get(key: Key) -> Value? {
        guard let value = _cache[key] else { return nil }
        if value.1 > 0 {
            _cache[key] = (value.1, value.2 - expiration)
        }
        return value.0
    }
    
    func evictExpired() {
        let expiredKeys = _cache.keys.filter { key in _cache[key].1 <= 0 }
        for key in expiredKeys {
            _cache.remove(_cache[key].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: Map<Key, (Value, TimeInterval)>
    var _expiration: TimeInterval
    var _expirationTimer: Timer
    
    init(expiration: TimeInterval) {
        _cache = Map<Key, (Value, TimeInterval)>()
        _expiration = expiration
        _expirationTimer = Timer()
        _expirationTimer.schedule(repeating: true, interval: expiration) {
            self.evictExpired()
        }
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = (value, expiration)
    }
    
    func get(key: Key) -> Value? {
        guard let value = _cache[key] else { return nil }
        if value.1 > 0 {
            _cache[key] = (value.1, value.2 - expiration)
        }
        return value.0
    }
    
    func evictExpired() {
        let expiredKeys = _cache.keys.filter { key in _cache[key].1 <= 0 }
        for key in expiredKeys {
            _cache.remove(_cache[key].1)
        }
    }
}
```

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 {
    
    // Map of key to value.
    // Keys are hashed to ensure uniqueness.
    var cache: Map<Key, Value>
    
    // Map of key to expiration time.
    // Keys are hashed to ensure uniqueness.
    var expirationMap: Map<Key, TimeInterval>
    
    // Maximum number of entries to keep in the cache.
    var maxSize: Int
    
    // Constructor.
    init(maxSize: Int = 100) {
        self.cache = Map<Key, Value>()
        self.expirationMap = Map<Key, TimeInterval>()
        self.maxSize = maxSize
    }
    
    // Puts a value in the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        // Remove the key from the expiration map if it exists.
        if let expirationTime = expirationMap[key] {
            expirationMap.remove(key: key)
        }
        
        // Remove the key from the cache if it exists.
        if let cachedValue = cache[key] {
            cache.remove(key: key)
        }
        
        // Add the key to the cache.
        cache[key] = value
        
        // Add the key to the expiration map.
        expirationMap[key] = expiration
    }
    
    // Gets a value from the cache.
    func get(key: Key) -> Value? {
        // Get the expiration time for the key.
        let expirationTime = expirationMap[key]
        
        // Check if the key is expired.
        if expirationTime != nil && expirationTime < TimeInterval.now {
            // Remove the key from the cache.
            cache.remove(key: key)
            
            // Remove the key from the expiration map.
            expirationMap.remove(key: key)
            
            // Return nil.
            return nil
        }
        
        // Return the value for the key.
        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 {
    
    // Map of key to value.
    // Keys are hashed to ensure uniqueness.
    var cache: Map<Key, Value>
    
    // Map of key to expiration time.
    // Keys are hashed to ensure uniqueness.
    var expirationMap: Map<Key, TimeInterval>
    
    // Maximum number of entries to keep in the cache.
    var maxSize: Int
    
    // Constructor.
    init(maxSize: Int = 100) {
        self.cache = Map<Key, Value>()
        self.expirationMap = Map<Key, TimeInterval>()
        self.maxSize = maxSize
    }
    
    // Puts a value in the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        // Remove the key from the expiration map if it exists.
        if let expirationTime = expirationMap[key] {
            expirationMap.remove(key: key)
        }
        
        // Remove the key from the cache if it exists.
        if let cachedValue = cache[key] {
            cache.remove(key: key)
        }
        
        // Add the key to the cache.
        cache[key] = value
        
        // Add the key to the expiration map.
        expirationMap[key] = expiration
    }
    
    // Gets a value from the cache.
    func get(key: Key) -> Value? {
        // Get the expiration time for the key.
        let expirationTime = expirationMap[key]
        
        // Check if the key is expired.
        if expirationTime != nil && expirationTime < TimeInterval.now {
            // Remove the key from the cache.
            cache.remove(key: key)
            
            // Remove the key from the expiration map.
            expirationMap.remove(key: key)
            
            // Return nil.
            return nil
        }
        
        // Return the value for the key.
        return cache[key]
    }
}

// Example usage:
let cache = ExpirableCache<String, Int>()
cache.put(value: 1, key: "key1", expiration: 10)
print(cache.get("key1")) // Prints 1
print(cache.get("key2")) // Prints 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 {
    
    // The maximum number of entries to keep in the cache.
    // If the cache grows beyond this limit, the oldest entries will be evicted.
    var maxEntries: Int
    
    // The maximum time to keep entries in the cache.
    // If an entry has not been accessed for this long, it will be evicted.
    var maxAge: TimeInterval
    
    // The underlying storage for the cache.
    // The keys are used as indices to the storage.
    var storage: Dictionary<Key, Value>
    
    // The list of keys that are currently in the cache.
    // The oldest keys are at the end of the list.
    var keys: [Key]
    
    // The number of entries in the cache.
    var count: Int
    
    // The time at which the cache was last updated.
    var lastUpdate: TimeInterval
    
    // Initializes a new ExpirableCache with the given parameters.
    init(maxEntries: Int = 1000, maxAge: TimeInterval = 60) {
        self.maxEntries = maxEntries
        self.maxAge = maxAge
        self.storage = Dictionary()
        self.keys = []
        self.count = 0
        self.lastUpdate = TimeInterval(0)
    }
    
    // Returns the value associated with the given key, or nil if the key is not in the cache.
    func get(key: Key) -> Value? {
        let value = storage[key]
        if value != nil {
            // Update the last access time for the key.
            let index = keys.index(of: key)
            keys.remove(at: index)
            keys.insert(at: index, at: key)
            lastUpdate = TimeInterval(0)
        }
        return value
    }
    
    // Puts the given value with the given key in the cache.
    // If the cache is full, the oldest entries will be evicted.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        if count >= maxEntries {
            // Evict the oldest entry.
            let oldestKey = keys.first()
            storage.remove(at: oldestKey)
            keys.remove(at: oldestKey)
            count -= 1
        }
        
        // Add the new entry to the cache.
        storage[key] = value
        keys.insert(at: count, at: key)
        count += 1
        lastUpdate = TimeInterval(0)
    }
    
    // Evicts all entries from the cache.
    func clear() {
        storage = Dictionary()
        keys = []
        count = 0
        lastUpdate = TimeInterval(0)
    }
}

```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 maximum number of entries to keep in the cache.
    // If the cache grows beyond this limit, the oldest entries will be evicted.
    var maxEntries: Int
    
    // The maximum time to keep entries in the cache.
    // If an entry has not been accessed for this long, it will be evicted.
    var maxAge: TimeInterval
    
    // The underlying storage for the cache.
    // The keys are used as indices to the storage.
    var storage: Dictionary<Key, Value>
    
    // The list of keys that are currently in the cache.
    // The oldest keys are at the end of the list.
    var keys: [Key]
    
    // The number of entries in the cache.
    var count: Int
    
    // The time at which the cache was last updated.
    var lastUpdate: TimeInterval
    
    // Initializes a new ExpirableCache with the given parameters.
    init(maxEntries: Int = 1000, maxAge: TimeInterval = 60) {
        self.maxEntries = maxEntries
        self.maxAge = maxAge
        self.storage = Dictionary()
        self.keys = []
        self.count = 0
        self.lastUpdate = TimeInterval(0)
    }
    
    // Returns the value associated with the given key, or nil if the key is not in the cache.
    func get(key: Key) -> Value? {
        let value = storage[key]
        if value != nil {
            // Update the last access time for the key.
            let index = keys.index(of: key)
            keys.remove(at: index)
            keys.insert(at: index, at: key)
            lastUpdate = TimeInterval(0)
        }
        return value
    }
    
    // Puts the given value with the given key in the cache.
    // If the cache is full, the oldest entries will be evicted.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        if count >= maxEntries {
            // Evict the oldest entry.
            let oldestKey = keys.first()
            storage.remove(at: oldestKey)
            keys.remove(at: oldestKey)
            count -= 1
        }
        
        // Add the new entry to the cache.
        storage[key] = value
        keys.insert(at: count, at: key)
        count += 1
        lastUpdate = TimeInterval(0)
    }
    
    // Evicts all entries from the cache.
    func clear() {
        storage = Dictionary()
        keys = []
        count = 0
        lastUpdate = TimeInterval(0)
    }
}
```

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> where Value: ExpirableCacheProtocol {
    private var cache: Dictionary<Key, Value> = Dictionary()
    private var expiration: Dictionary<Key, TimeInterval> = Dictionary()

    public init(capacity: Int = 100) {
        self.init(capacity: capacity, expirationPolicy: DefaultExpirationPolicy())
    }

    public init(capacity: Int = 100, expirationPolicy: ExpirationPolicy<Key, Value>) {
        self.init(capacity: capacity, expirationPolicy: expirationPolicy, evictionPolicy: DefaultEvictionPolicy())
    }

    public init(capacity: Int = 100, expirationPolicy: ExpirationPolicy<Key, Value>, evictionPolicy: EvictionPolicy<Key, Value>) {
        self.init(capacity: capacity, expirationPolicy: expirationPolicy, evictionPolicy: evictionPolicy, keyGenerator: DefaultKeyGenerator())
    }

    public init(capacity: Int = 100, expirationPolicy: ExpirationPolicy<Key, Value>, evictionPolicy: EvictionPolicy<Key, Value>, keyGenerator: KeyGenerator<Key, Value>) {
        self.init(capacity: capacity, expirationPolicy: expirationPolicy, evictionPolicy: evictionPolicy, keyGenerator: keyGenerator, cache: Dictionary(), expiration: Dictionary())
    }

    public init(capacity: Int = 100, expirationPolicy: ExpirationPolicy<Key, Value>, evictionPolicy: EvictionPolicy<Key, Value>, keyGenerator: KeyGenerator<Key, Value>, cache: Dictionary<Key, Value>, expiration: Dictionary<Key, TimeInterval>) {
        self.init(capacity: capacity, expirationPolicy: expirationPolicy, evictionPolicy: evictionPolicy, keyGenerator: keyGenerator, cache: cache, expiration: expiration)
    }

    public func put(value: Value, key: Key, expiration: TimeInterval) {
        self.put(value: value, key: key, expiration: expiration, expirationPolicy: expirationPolicy, evictionPolicy: evictionPolicy, keyGenerator: keyGenerator)
    }

    public func put(value: Value, key: Key, expiration: TimeInterval, expirationPolicy: ExpirationPolicy<Key, Value>, evictionPolicy: EvictionPolicy<Key, Value>, keyGenerator: KeyGenerator<Key, Value>) {
        if let cachedValue = self[key] {
            expiration[key] = expiration
            return
        }

        if let cachedValue = cache[key] {
            expiration[key] = expiration
            return
        }

        if cache.count == capacity {
            let expiredKey = expiration.keys.first(<|fim_suffix|>
            cache.remove(expiredKey)
        }

        cache[key] = value
        expiration[key] = expiration
    }

    public func get(key: Key) -> Value? {
        if let cachedValue = self[key] {
            return cachedValue
        }

        if let cachedValue = cache[key] {
            return cachedValue
        }

        return nil
    }

    public func remove(key: Key) {
        cache.remove(key)
        expiration.remove(key)
    }

    public func clear() {
        cache.clear()
        expiration.clear()
    }

    public func count() -> Int {
        return cache.count
    }

    public func capacity() -> Int {
        return capacity
    }

    public func contains(key: Key) -> Bool {
        return cache.contains(key) || expiration.contains(key)
    }

    public func keys() -> [Key] {
        return cache.keys.union(expiration.keys)
    }

    public func values() -> [Value] {
        return cache.values.union(expiration.values)
    }

    public func items() -> [(Key, Value)] {
        return cache.items.union(expiration.items)
    }

    public func[key: Key] -> Value? {
        return self.get(key: key)
    }

    public func[key: Key] = value {
        self.put(value: value, key: key)
    }

    public func remove(key: Key) {
        self.remove(key: key)
    }

    public func clear() {
        self.clear()
    }

    public func count() -> Int {
        return self.count()
    }

    public func capacity() -> Int {
        return self.capacity()
    }

    public func contains(key: Key) -> Bool {
        return self.contains(key: key)

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 {
    
    // Map of key to value.
    // Keys are used as indices to the map.
    // Values are used as values in the map.
    // Keys are not allowed to be nil.
    // Values are allowed to be nil.
    // Keys must be unique.
    // Values must be unique.
    // Keys must be hashable.
    // Values must be hashable.
    private var map: Map<Key, Value>
    
    // Expiration time for each key.
    // Keys are used as indices to the map.
    // Values are used as values in the map.
    // Keys are not allowed to be nil.
    // Values are allowed to be nil.
    // Keys must be hashable.
    // Values must be hashable.
    private var expiration: Map<Key, TimeInterval>
    
    // Creates a new ExpirableCache.
    // The default expiration time is 1 day.
    // The default capacity is 10.
    init()
    {
        self.map = Map<Key, Value>()
        self.expiration = Map<Key, TimeInterval>()
    }
    
    // Creates a new ExpirableCache.
    // The expiration time is set to the specified value.
    // The default capacity is 10.
    init(expiration: TimeInterval)
    {
        self.expiration = Map<Key, TimeInterval>()
        self.expiration[Key] = expiration
    }
    
    // Creates a new ExpirableCache.
    // The expiration time is set to the specified value.
    // The capacity is set to the specified value.
    init(expiration: TimeInterval, capacity: Int)
    {
        self.expiration = Map<Key, TimeInterval>()
        self.expiration[Key] = expiration
        self.map = Map<Key, Value>(capacity: capacity)
    }
    
    // Puts a value into the cache.
    // The value is stored for the specified amount of time.
    // The value is not allowed to be nil.
    // The key must be hashable.
    func put(value: Value, key: Key, expiration: TimeInterval)
    {
        self.map[key] = value
        self.expiration[key] = expiration
    }
    
    // Gets a value from the cache.
    // The value is not allowed to be nil.
    // The key must be hashable.
    func get(key: Key) -> Value?
    {
        if let value = self.map[key] {
            if let expiration = self.expiration[key] {
                if expiration > 0 {
                    if expiration < Date.now.timeIntervalSinceDate {
                        self.map.remove(key)
                        self.expiration.remove(key)
                        return nil
                    }
                }
            }
            return value
        }
        return nil
    }
    
    // Gets a value from the cache.
    // The value is not allowed to be nil.
    // The key must be hashable.
    func subscript(key: Key) -> Value
    {
        return self.get(key)!
    }
    
    // Removes a value from the cache.
    // The key must be hashable.
    func remove(key: Key)
    {
        self.map.remove(key)
        self.expiration.remove(key)
    }
    
    // Clears the cache.
    func clear()
    {
        self.map.clear()
        self.expiration.clear()
    }
    
    // Returns the number of elements in the cache.
    func count() -> Int
    {
        return self.map.count
    }
    
    // Returns true if the cache is empty.
    func is_empty() -> Bool
    {
        return self.map.is_empty
    }
    
    // Returns the capacity of the cache.
    func capacity() -> Int
    {
        return self.map.capacity
    }
    
    // Returns the number of elements in the cache.
    func capacity_used() -> Int
    {
        return self.map.count
    }
    
    // Returns the expiration time for the specified key.
    // The key must be hashable.
    func expiration_time(key: Key) -> TimeInterval
    {
        return self.expiration[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>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the cache with an eviction policy.
    init(evictionPolicy: EvictionPolicy<Key, Value>) {
        _cache = Dictionary()
        _expiration = Dictionary()
        _evictionPolicy = evictionPolicy
    }
    
    // Putting a value in the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
    }
    
    // Getting a value from the cache.
    func get(key: Key) -> Value? {
        if let value = _cache[key] {
            if let expiration = _expiration[key] {
                if expiration > 0 {
                    if expiration <= TimeInterval(seconds: 0) {
                        _cache.remove(key)
                        _expiration.remove(key)
                        return nil
                    } else {
                        _expiration[key] = expiration - TimeInterval(seconds: 0)
                    }
                }
            }
            return value
        }
        return nil
    }
    
    // Eviction policy for the cache.
    associatedtype EvictionPolicy<Key: Hashable, Value> {
        func evict(key: Key, value: Value) -> Bool {
            return _evictionPolicy.evict(key, value)
        }
    }
}

struct LRU<Key: Hashable, Value>: ExpirableCacheProtocol.EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the eviction policy with a cache.
    init(cache: ExpirableCache<Key, Value>) {
        _cache = cache._cache
        _expiration = cache._expiration
        _evictionPolicy = cache._evictionPolicy
    }
    
    // Eviction policy for the cache.
    func evict(key: Key, value: Value) -> Bool {
        _cache.remove(key)
        _expiration.remove(key)
        return true
    }
}

struct FIFO<Key: Hashable, Value>: ExpirableCacheProtocol.EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the eviction policy with a cache.
    init(cache: ExpirableCache<Key, Value>) {
        _cache = cache._cache
        _expiration = cache._expiration
        _evictionPolicy = cache._evictionPolicy
    }
    
    // Eviction policy for the cache.
    func evict(key: Key, value: Value) -> Bool {
        _cache.remove(key)
        _expiration.remove(key)
        return true
    }
}

struct Random<Key: Hashable, Value>: ExpirableCacheProtocol.EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the eviction policy with a cache.
    init(cache: ExpirableCache<Key, Value>) {
        _cache = cache._cache
        _expiration = cache._expiration
        _evictionPolicy = cache._evictionPolicy
    }
    
    // Eviction policy for the cache.
    func evict(key: Key, value: Value) -> Bool {
        let keys = _cache.keys
        let index = Int.random(in: 0..<keys.count)
        _cache.remove(keys[index])
        _expiration.remove(keys[index])
        return true
    }
}

```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>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the cache with an eviction policy.
    init(evictionPolicy: EvictionPolicy<Key, Value>) {
        _cache = Dictionary()
        _expiration = Dictionary()
        _evictionPolicy = evictionPolicy
    }
    
    // Putting a value in the cache with an expiration time.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
    }
    
    // Getting a value from the cache.
    func get(key: Key) -> Value? {
        if let value = _cache[key] {
            if let expiration = _expiration[key] {
                if expiration > 0 {
                    if expiration <= TimeInterval(seconds: 0) {
                        _cache.remove(key)
                        _expiration.remove(key)
                        return nil
                    } else {
                        _expiration[key] = expiration - TimeInterval(seconds: 0)
                    }
                }
            }
            return value
        }
        return nil
    }
    
    // Eviction policy for the cache.
    associatedtype EvictionPolicy<Key: Hashable, Value> {
        func evict(key: Key, value: Value) -> Bool {
            return _evictionPolicy.evict(key, value)
        }
    }
}

// Eviction policy for the cache.
struct LRU<Key: Hashable, Value>: ExpirableCacheProtocol.EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the eviction policy with a cache.
    init(cache: ExpirableCache<Key, Value>) {
        _cache = cache._cache
        _expiration = cache._expiration
        _evictionPolicy = cache._evictionPolicy
    }
    
    // Eviction policy for the cache.
    func evict(key: Key, value: Value) -> Bool {
        _cache.remove(key)
        _expiration.remove(key)
        return true
    }
}

// Eviction policy for the cache.
struct FIFO<Key: Hashable, Value>: ExpirableCacheProtocol.EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the eviction policy with a cache.
    init(cache: ExpirableCache<Key, Value>) {
        _cache = cache._cache
        _expiration = cache._expiration
        _evictionPolicy = cache._evictionPolicy
    }
    
    // Eviction policy for the cache.
    func evict(key: Key, value: Value) -> Bool {
        _cache.remove(key)
        _expiration.remove(key)
        return true
    }
}

// Eviction policy for the cache.
struct Random<Key: Hashable, Value>: ExpirableCacheProtocol.EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    // Initializing the eviction policy with a cache.
    init(cache: ExpirableCache<Key, Value>) {
        _cache = cache._cache
        _expiration = cache._expiration
        _evictionPolicy = cache._evictionPolicy
    }
    
    // Eviction policy for the cache.
    func evict(key: Key, value: Value) -> Bool {
        let keys = _cache.keys
        let index = Int.random(in: 0..<keys.count)
        _cache.remove(keys[index])
        _expiration.remove(keys[index])
        return true
    }
}

// Eviction policy for the cache.
struct LFU<Key: Hashable, Value>: ExpirableCacheProtocol.EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value

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>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    init(evictionPolicy: EvictionPolicy<Key, Value>) {
        _cache = Dictionary()
        _expiration = Dictionary()
        _evictionPolicy = evictionPolicy
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
        _evictionPolicy.put(key, value, expiration)
    }
    
    func get(key: Key) -> Value? {
        var value = _cache[key]
        if value == nil {
            return nil
        }
        
        var expiration = _expiration[key]
        if expiration == 0 {
            return value
        }
        
        var now = TimeInterval(Date().timeIntervalSince1970)
        if expiration < now {
            _evictionPolicy.remove(key)
            return nil
        }
        
        return value
    }
}

protocol EvictionPolicy<Key: Hashable, Value> {
    func put(key: Key, value: Value, expiration: TimeInterval)
    func remove(key: Key)
}

class LruEvictionPolicy<Key: Hashable, Value>: EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _keys: LinkedList<Key>
    var _capacity: Int
    
    init(capacity: Int) {
        _cache = Dictionary()
        _keys = LinkedList()
        _capacity = capacity
    }
    
    func put(key: Key, value: Value, expiration: TimeInterval) {
        if _cache.contains(key) {
            _keys.remove(_cache[key])
        } else if _keys.count >= _capacity {
            var keyToRemove = _keys.first!
            _keys.remove(keyToRemove)
            _cache.remove(keyToRemove)
        }
        
        _keys.append(key)
        _cache[key] = value
    }
    
    func remove(key: Key) {
        _keys.remove(_cache[key])
        _cache.remove(key)
    }
}

class LfuEvictionPolicy<Key: Hashable, Value>: EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _frequencies: Dictionary<Key, Int>
    var _keys: LinkedList<Key>
    var _capacity: Int
    
    init(capacity: Int) {
        _cache = Dictionary()
        _frequencies = Dictionary()
        _keys = LinkedList()
        _capacity = capacity
    }
    
    func put(key: Key, value: Value, expiration: TimeInterval) {
        if _cache.contains(key) {
            _keys.remove(_cache[key])
            _frequencies[key]++
        } else if _keys.count >= _capacity {
            var keyToRemove = _keys.first!
            _keys.remove(keyToRemove)
            _cache.remove(keyToRemove)
            _frequencies.remove(keyToRemove)
        }
        
        _keys.append(key)
        _cache[key] = value
        _frequencies[key] = 1
    }
    
    func remove(key: Key) {
        _keys.remove(_cache[key])
        _cache.remove(key)
        _frequencies.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: Dictionary<Key, Value>
    var _expiration: Dictionary<Key, TimeInterval>
    var _evictionPolicy: EvictionPolicy<Key, Value>
    
    init(evictionPolicy: EvictionPolicy<Key, Value>) {
        _cache = Dictionary()
        _expiration = Dictionary()
        _evictionPolicy = evictionPolicy
    }
    
    func put(value: Value, key: Key, expiration: TimeInterval) {
        _cache[key] = value
        _expiration[key] = expiration
        _evictionPolicy.put(key, value, expiration)
    }
    
    func get(key: Key) -> Value? {
        var value = _cache[key]
        if value == nil {
            return nil
        }
        
        var expiration = _expiration[key]
        if expiration == 0 {
            return value
        }
        
        var now = TimeInterval(Date().timeIntervalSince1970)
        if expiration < now {
            _evictionPolicy.remove(key)
            return nil
        }
        
        return value
    }
}

// Eviction policy for expiring cache entries.
protocol EvictionPolicy<Key: Hashable, Value> {
    func put(key: Key, value: Value, expiration: TimeInterval)
    func remove(key: Key)
}

// LRU eviction policy.
class LruEvictionPolicy<Key: Hashable, Value>: EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _keys: LinkedList<Key>
    var _capacity: Int
    
    init(capacity: Int) {
        _cache = Dictionary()
        _keys = LinkedList()
        _capacity = capacity
    }
    
    func put(key: Key, value: Value, expiration: TimeInterval) {
        if _cache.contains(key) {
            _keys.remove(_cache[key])
        } else if _keys.count >= _capacity {
            var keyToRemove = _keys.first!
            _keys.remove(keyToRemove)
            _cache.remove(keyToRemove)
        }
        
        _keys.append(key)
        _cache[key] = value
    }
    
    func remove(key: Key) {
        _keys.remove(_cache[key])
        _cache.remove(key)
    }
}

// LFU eviction policy.
class LfuEvictionPolicy<Key: Hashable, Value>: EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _frequencies: Dictionary<Key, Int>
    var _keys: LinkedList<Key>
    var _capacity: Int
    
    init(capacity: Int) {
        _cache = Dictionary()
        _frequencies = Dictionary()
        _keys = LinkedList()
        _capacity = capacity
    }
    
    func put(key: Key, value: Value, expiration: TimeInterval) {
        if _cache.contains(key) {
            _keys.remove(_cache[key])
            _frequencies[key]++
        } else if _keys.count >= _capacity {
            var keyToRemove = _keys.first!
            _keys.remove(keyToRemove)
            _cache.remove(keyToRemove)
            _frequencies.remove(keyToRemove)
        }
        
        _keys.append(key)
        _cache[key] = value
        _frequencies[key] = 1
    }
    
    func remove(key: Key) {
        _keys.remove(_cache[key])
        _cache.remove(key)
        _frequencies.remove(key)
    }
}

// LRU eviction policy with custom expiration.
class LruEvictionPolicyWithExpiration<Key: Hashable, Value>: EvictionPolicy<Key, Value> {
    var _cache: Dictionary<Key, Value>
    var _keys: LinkedList<Key>
    var _capacity: Int
    var _expiration: Dictionary<Key, TimeInterval>
    
    init(capacity: Int, expiration: Dictionary<Key, TimeInterval>) {
        _cache = Dictionary()
        _keys = LinkedList()
        _capacity = capacity
        _expiration = expiration
    }
    
    func put(key: Key, value: Value, expiration: TimeInterval) {
        

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(length: string.length)
        for i in 0..<string.length {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.length]
            encryptedData[i] = encryptedChar
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString = ""
        for i in 0..<data.length {
            var encryptedChar = data[i]
            var decryptedChar = encryptedChar ^ key[i % key.length]
            decryptedString += String(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(length: string.length)
        for i in 0..<string.length {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.length]
            encryptedData[i] = encryptedChar
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString = ""
        for i in 0..<data.length {
            var encryptedChar = data[i]
            var decryptedChar = encryptedChar ^ key[i % key.length]
            decryptedString += String(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 Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = Data(length: string.length)
        for i in 0..<string.length {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.length]
            encryptedData[i] = encryptedChar
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString = ""
        for i in 0..<data.length {
            var encryptedChar = data[i]
            var decryptedChar = encryptedChar ^ key[i % key.length]
            decryptedString += String(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 Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = Data(length: string.length)
        for i in 0..<string.length {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.length]
            encryptedData[i] = encryptedChar
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString = ""
        for i in 0..<data.length {
            var encryptedChar = data[i]
            var decryptedChar = encryptedChar ^ key[i % key.length]
            decryptedString += String(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 Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = Data(length: string.length)
        for i in 0..<string.length {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.length]
            encryptedData[i] = encryptedChar
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString = ""
        for i in 0..<data.length {
            var encryptedChar = data[i]
            var decryptedChar = encryptedChar ^ key[i % key.length]
            decryptedString += String(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 Encryptor: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = Data(length: string.length)
        for i in 0..<string.length {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.length]
            encryptedData[i] = encryptedChar
        }
        return encryptedData
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedString = ""
        for i in 0..<data.length {
            var encryptedChar = data[i]
            var decryptedChar = encryptedChar ^ key[i % key.length]
            

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
    var keyIndex: Int
    var keyBytes: [UInt8]
    var keyBytesLength: Int
    var keyBytesIndex: Int
    var keyBytesBytes: [UInt8]
    var keyBytesBytesLength: Int
    var keyBytesBytesIndex: Int
    var keyBytesBytesBytes: [UInt8]
    var keyBytesBytesBytesLength: Int
    var keyBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytes: [UInt8]
    var keyBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytesBytesBytesBytesIndex: Int
    var keyBytesBytesBytesBytesBytesLength: Int
    var keyBytesBytes

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(length: string.length)
        for i in 0 ..< string.length {
            let char = string[i]
            let keyChar = key[i % key.length]
            let encryptedChar = char ^ keyChar
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }
    
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = String()
        for i in 0 ..< data.length {
            let encryptedChar = data[i]
            let keyChar = key[i % key.length]
            let decryptedChar = encryptedChar ^ keyChar
            decryptedData.append(decryptedChar)
        }
        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(length: string.length)
        for i in 0 ..< string.length {
            let char = string[i]
            let keyChar = key[i % key.length]
            let encryptedChar = char ^ keyChar
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }
    
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = String()
        for i in 0 ..< data.length {
            let encryptedChar = data[i]
            let keyChar = key[i % key.length]
            let decryptedChar = encryptedChar ^ keyChar
            decryptedData.append(decryptedChar)
        }
        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(length: string.length)
        for i in 0 ..< string.length {
            let char = string[i]
            let keyChar = key[i % key.length]
            let encryptedChar = char ^ keyChar
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }
    
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = String()
        for i in 0 ..< data.length {
            let encryptedChar = data[i]
            let keyChar = key[i % key.length]
            let decryptedChar = encryptedChar ^ keyChar
            decryptedData.append(decryptedChar)
        }
        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(length: string.length)
        for i in 0 ..< string.length {
            let char = string[i]
            let keyChar = key[i % key.length]
            let encryptedChar = char ^ keyChar
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }
    
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = String()
        for i in 0 ..< data.length {
            let encryptedChar = data[i]
            let keyChar = key[i % key.length]
            let decryptedChar = encryptedChar ^ keyChar
            decryptedData.append(decryptedChar)
        }
        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(length: string.length)
        for i in 0 ..< string.length {
            let char = string[i]
            let keyChar = key[i % key.length]
            let encryptedChar = char ^ keyChar
            encryptedData.append(encryptedChar)
        }
        return encryptedData
    }
    
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = String()
        for i in 0 ..< data.length {
            let encryptedChar = data[i]
            let keyChar = key[i % key.length]
            let decryptedChar = encryptedChar ^ keyChar
            decryptedData.append(decryptedChar)
        }
        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(length: string.length)
        for i in 0 ..< string.length {
            let char = string[i]
            let keyChar = key[i % key.length]
            let encrypted

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 keyArray: [String] = [""]
    var keyArrayIndex: Int = 0
    var keyArrayLength: Int = 0
    var keyArrayIndexLength: Int = 0
    var keyArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndex: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexLength: Int = 0
    var keyArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArrayIndexArray: [[String]] = [[""]]
    var key

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 = ""
    
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        let keyBytes = key.map(_: Char)
        let stringBytes = string.utf8CodePoints
        let encryptedBytes = stringBytes.map(_: Int)
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protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    var key: String = ""
    
    func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for i in 0 ..< string.count {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.count]
            encryptedData += String(character: encryptedChar, encoding: .utf8)
        }
        return Data(encryptedData)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for i in 0 ..< data.count {
            var char = data[i]
            var decryptedChar = char ^ key[i % key.count]
            decryptedData += String(character: decryptedChar, encoding: .utf8)
        }
        return decryptedData
    }
}

class Decryptor: EncryptorProtocol {
    var key: String = ""
    
    func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for i in 0 ..< string.count {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.count]
            encryptedData += String(character: encryptedChar, encoding: .utf8)
        }
        return Data(encryptedData)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for i in 0 ..< data.count {
            var char = data[i]
            var decryptedChar = char ^ key[i % key.count]
            decryptedData += String(character: decryptedChar, 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 {
    var key: String = ""
    
    func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for i in 0 ..< string.count {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.count]
            encryptedData += String(character: encryptedChar, encoding: .utf8)
        }
        return Data(encryptedData)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for i in 0 ..< data.count {
            var char = data[i]
            var decryptedChar = char ^ key[i % key.count]
            decryptedData += String(character: decryptedChar, 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 Decryptor: EncryptorProtocol {
    var key: String = ""
    
    func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for i in 0 ..< string.count {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.count]
            encryptedData += String(character: encryptedChar, encoding: .utf8)
        }
        return Data(encryptedData)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for i in 0 ..< data.count {
            var char = data[i]
            var decryptedChar = char ^ key[i % key.count]
            decryptedData += String(character: decryptedChar, 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 {
    var key: String = ""
    
    func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for i in 0 ..< string.count {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.count]
            encryptedData += String(character: encryptedChar, encoding: .utf8)
        }
        return Data(encryptedData)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for i in 0 ..< data.count {
            var char = data[i]
            var decryptedChar = char ^ key[i % key.count]
            decryptedData += String(character: decryptedChar, 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 Decryptor: EncryptorProtocol {
    var key: String = ""
    
    func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for i in 0 ..< string.count {
            var char = string[i]
            var encryptedChar = char ^ key[i % key.count]
            encryptedData += String(character: encryptedChar, encoding: .utf8)
        }
        return Data(encryptedData)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for i in 0 ..< data.count {
            var char = data[i]
            var decryptedChar = char ^ key[i % key.count]
            decryptedData += String(character: decryptedChar, 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 {
    var key: String = ""
    
    func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for i in 0 ..< string.count {
            var char = string[i]
            var encryptedChar = char ^ key[

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    var key: String
    var keyBytes: [Byte]
    var keyLength: Int
    
    init(key: String) {
        self.key = key
        self.keyBytes = self.key.map { (it as Byte) }
        self.keyLength = self.keyBytes.count
    }
    
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyBytes = key.map { (it as Byte) }
        let keyLength = keyBytes.count
        let stringBytes = string.map { (it as Byte) }
        let stringLength = stringBytes.count
        
        guard let encryptedData = Data(length: stringLength) else {
            return nil!
        }
        
        for i in 0..<stringLength {
            let encryptedByte = stringBytes[i] ^ keyBytes[i % keyLength]
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyBytes = key.map { (it as Byte) }
        let keyLength = keyBytes.count
        let dataBytes = data.map { (it as Byte) }
        let dataLength = dataBytes.count
        
        guard let decryptedString = String(length: dataLength) else {
            return nil!
        }
        
        for i in 0..<dataLength {
            let decryptedByte = dataBytes[i] ^ keyBytes[i % keyLength]
            decryptedString.append(decryptedByte)
        }
        
        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
    var keyBytes: [Byte]
    var keyLength: Int
    
    init(key: String) {
        self.key = key
        self.keyBytes = self.key.map { (it as Byte) }
        self.keyLength = self.keyBytes.count
    }
    
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyBytes = key.map { (it as Byte) }
        let keyLength = keyBytes.count
        let stringBytes = string.map { (it as Byte) }
        let stringLength = stringBytes.count
        
        guard let encryptedData = Data(length: stringLength) else {
            return nil!
        }
        
        for i in 0..<stringLength {
            let encryptedByte = stringBytes[i] ^ keyBytes[i % keyLength]
            encryptedData.append(encryptedByte)
        }
        
        return encryptedData
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyBytes = key.map { (it as Byte) }
        let keyLength = keyBytes.count
        let dataBytes = data.map { (it as Byte) }
        let dataLength = dataBytes.count
        
        guard let decryptedString = String(length: dataLength) else {
            return nil!
        }
        
        for i in 0..<dataLength {
            let decryptedByte = dataBytes[i] ^ keyBytes[i % keyLength]
            decryptedString.append(decryptedByte)
        }
        
        return decryptedString
    }
}
```

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    var key: String = ""
    
    func encrypt(_ string: String, key: String) -> Data {
        var encryptedString: String = ""
        for i in 0..<string.count {
            encryptedString += (string[i] ^ key[i % key.count])
        }
        return Data(encryptedString)
    }
    
    func decrypt(_ data: Data, key: String) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            decryptedString += (data[i] ^ key[i % key.count])
        }
        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 = ""
    
    func encrypt(_ string: String, key: String) -> Data {
        var encryptedString: String = ""
        for i in 0..<string.count {
            encryptedString += (string[i] ^ key[i % key.count])
        }
        return Data(encryptedString)
    }
    
    func decrypt(_ data: Data, key: String) -> String {
        var decryptedString: String = ""
        for i in 0..<data.count {
            decryptedString += (data[i] ^ key[i % key.count])
        }
        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 {
        let encryptedData = String(contents: string: string)
        .map(
            {
                let binaryString = String(data: String(string: $0).binaryString, encoding: .hex)
                let keyBinaryString = String(data: String(string: _key).binaryString, encoding: .hex)
                let encryptedBinaryString = binaryString.mapIndexed(
                    { index, binaryString in
                        let keyBinaryString = keyBinaryString[index % keyBinaryString.length]
                        binaryString.binaryString(bitwise: .xor(keyBinaryString))
                    }
                )
                encryptedBinaryString.join("")
            }
        )
        .join("")
        return Data(contents: encryptedData)
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = String(contents: data.contents)
        .map(
            {
                let binaryString = String(data: String(string: $0).binaryString, encoding: .hex)
                let keyBinaryString = String(data: String(string: _key).binaryString, encoding: .hex)
                let decryptedBinaryString = binaryString.mapIndexed(
                    { index, binaryString in
                        let keyBinaryString = keyBinaryString[index % keyBinaryString.length]
                        binaryString.binaryString(bitwise: .xor(keyBinaryString))
                    }
                )
                decryptedBinaryString.join("")
            }
        )
        .join("")
        return String(data: decryptedData, encoding: .utf8)
    }
}

```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 {
        let encryptedData = String(contents: string: string)
        .map(
            {
                let binaryString = String(data: String(string: $0).binaryString, encoding: .hex)
                let keyBinaryString = String(data: String(string: _key).binaryString, encoding: .hex)
                let encryptedBinaryString = binaryString.mapIndexed(
                    { index, binaryString in
                        let keyBinaryString = keyBinaryString[index % keyBinaryString.length]
                        binaryString.binaryString(bitwise: .xor(keyBinaryString))
                    }
                )
                encryptedBinaryString.join("")
            }
        )
        .join("")
        return Data(contents: encryptedData)
    }

    override func decrypt(_ data: Data, _ key: String) -> String {
        let decryptedData = String(contents: data.contents)
        .map(
            {
                let binaryString = String(data: String(string: $0).binaryString, encoding: .hex)
                let keyBinaryString = String(data: String(string: _key).binaryString, encoding: .hex)
                let decryptedBinaryString = binaryString.mapIndexed(
                    { index, binaryString in
                        let keyBinaryString = keyBinaryString[index % keyBinaryString.length]
                        binaryString.binaryString(bitwise: .xor(keyBinaryString))
                    }
                )
                decryptedBinaryString.join("")
            }
        )
        .join("")
        return String(data: decryptedData, encoding: .utf8)
    }
}
```

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 = ""
        for char in string: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let encryptedCharCode = charCode ^ keyCharCode
            encryptedData += String(contents: String(contents: String(character: Char(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return Data(contents: encryptedData, encoding: .utf8)
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for char in data.contents: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let decryptedCharCode = charCode ^ keyCharCode
            decryptedData += String(contents: String(contents: String(character: Char(charCode: decryptedCharCode)), encoding: .utf8))
        }
        return decryptedData
    }
}

class Encryptor2: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for char in string: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let encryptedCharCode = charCode ^ keyCharCode
            encryptedData += String(contents: String(contents: String(character: Char(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return Data(contents: encryptedData, encoding: .utf8)
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for char in data.contents: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let decryptedCharCode = charCode ^ keyCharCode
            decryptedData += String(contents: String(contents: String(character: Char(charCode: decryptedCharCode)), encoding: .utf8))
        }
        return decryptedData
    }
}

class Encryptor3: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for char in string: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let encryptedCharCode = charCode ^ keyCharCode
            encryptedData += String(contents: String(contents: String(character: Char(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return Data(contents: encryptedData, encoding: .utf8)
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for char in data.contents: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let decryptedCharCode = charCode ^ keyCharCode
            decryptedData += String(contents: String(contents: String(character: Char(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 = ""
        for char in string: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let encryptedCharCode = charCode ^ keyCharCode
            encryptedData += String(contents: String(contents: String(character: Char(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return Data(contents: encryptedData, encoding: .utf8)
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for char in data.contents: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let decryptedCharCode = charCode ^ keyCharCode
            decryptedData += String(contents: String(contents: String(character: Char(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 Encryptor2: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for char in string: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let encryptedCharCode = charCode ^ keyCharCode
            encryptedData += String(contents: String(contents: String(character: Char(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return Data(contents: encryptedData, encoding: .utf8)
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for char in data.contents: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let decryptedCharCode = charCode ^ keyCharCode
            decryptedData += String(contents: String(contents: String(character: Char(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 Encryptor3: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for char in string: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let encryptedCharCode = charCode ^ keyCharCode
            encryptedData += String(contents: String(contents: String(character: Char(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return Data(contents: encryptedData, encoding: .utf8)
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for char in data.contents: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let decryptedCharCode = charCode ^ keyCharCode
            decryptedData += String(contents: String(contents: String(character: Char(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 Encryptor4: EncryptorProtocol {
    override func encrypt(_ string: String, _ key: String) -> Data {
        var encryptedData = ""
        for char in string: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0)
            let encryptedCharCode = charCode ^ keyCharCode
            encryptedData += String(contents: String(contents: String(character: Char(charCode: encryptedCharCode)), encoding: .utf8))
        }
        return Data(contents: encryptedData, encoding: .utf8)
    }
    override func decrypt(_ data: Data, _ key: String) -> String {
        var decryptedData = ""
        for char in data.contents: {
            let charCode = char.codePointAt!()
            let keyCharCode = key.codePointAt!(0

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 = Date.timeIntervalSince1970
    }
    
    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 = Date.timeIntervalSince1970
        var elapsedTime = now - lastRequestTime
        if elapsedTime < timeInterval {
            return false
        }
        
        if requestCount < maxRequests {
            requestCount += 1
            lastRequestTime = now
            return true
        }
        
        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 _requestCount: Int
    private var _lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = Date.timeIntervalSince1970
    }
    
    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 = Date.timeIntervalSince1970
        var elapsedTime = now - lastRequestTime
        if elapsedTime < timeInterval {
            return false
        }
        
        if requestCount < maxRequests {
            requestCount += 1
            lastRequestTime = now
            return true
        }
        
        return false
    }
}
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    // The maximum number of requests allowed within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests is allowed.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The timestamp of the last request made within the defined time interval.
    private var lastRequestTime: Double
    
    // Initializer for the rate limiter.
    // @param maxRequests The maximum number of requests allowed within the defined time interval.
    // @param timeInterval The time interval in which the maximum number of requests is allowed.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = 0.0
    }
    
    // Method to determine if a new request can be made within the defined limits.
    // @return True if a new request can be made within the defined limits, false otherwise.
    func allowRequest() -> Bool {
        // Check if the maximum number of requests has been reached.
        if self.requestCount >= self.maxRequests {
            // Check if the time interval has elapsed since the last request.
            if (Date.now.timeIntervalSinceDate(self.lastRequestTime) >= self.timeInterval) {
                // Reset the request count and the last request time.
                self.requestCount = 0
                self.lastRequestTime = Date.now.timeIntervalSinceDate(0)
                return true
            } else {
                // Return false if the time interval has not elapsed since the last request.
                return false
            }
        } else {
            // Increment the request count and the last request time.
            self.requestCount += 1
            self.lastRequestTime = Date.now.timeIntervalSinceDate(0)
            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 {
    // The maximum number of requests allowed within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests is allowed.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The timestamp of the last request made within the defined time interval.
    private var lastRequestTime: Double
    
    // Initializer for the rate limiter.
    // @param maxRequests The maximum number of requests allowed within the defined time interval.
    // @param timeInterval The time interval in which the maximum number of requests is allowed.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = 0.0
    }
    
    // Method to determine if a new request can be made within the defined limits.
    // @return True if a new request can be made within the defined limits, false otherwise.
    func allowRequest() -> Bool {
        // Check if the maximum number of requests has been reached.
        if self.requestCount >= self.maxRequests {
            // Check if the time interval has elapsed since the last request.
            if (Date.now.timeIntervalSinceDate(self.lastRequestTime) >= self.timeInterval) {
                // Reset the request count and the last request time.
                self.requestCount = 0
                self.lastRequestTime = Date.now.timeIntervalSinceDate(0)
                return true
            } else {
                // Return false if the time interval has not elapsed since the last request.
                return false
            }
        } else {
            // Increment the request count and the last request time.
            self.requestCount += 1
            self.lastRequestTime = Date.now.timeIntervalSinceDate(0)
            return true
        }
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    // The maximum number of requests that can be made within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests can be made.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The timestamp of the last request made within the defined time interval.
    private var lastRequestTime: TimeInterval
    
    // Initializes the rate limiter with the maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined time interval.
    func allowRequest() -> Bool {
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {
            return false
        }
        
        // If the time interval has passed, reset the request count and last request time.
        if TimeInterval(self.lastRequestTime) + self.timeInterval <= TimeInterval() {
            self.requestCount = 0
            self.lastRequestTime = TimeInterval()
        }
        
        // Increment the request count and return true.
        self.requestCount += 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 {
    // The maximum number of requests that can be made within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests can be made.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The timestamp of the last request made within the defined time interval.
    private var lastRequestTime: TimeInterval
    
    // Initializes the rate limiter with the maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined time interval.
    func allowRequest() -> Bool {
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {
            return false
        }
        
        // If the time interval has passed, reset the request count and last request time.
        if TimeInterval(self.lastRequestTime) + self.timeInterval <= TimeInterval() {
            self.requestCount = 0
            self.lastRequestTime = TimeInterval()
        }
        
        // Increment the request count and return true.
        self.requestCount += 1
        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 {
    // The maximum number of requests that can be made within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests can be made.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The timestamp of the last request made within the defined time interval.
    private var lastRequestTime: TimeInterval
    
    // Initializes the rate limiter with the maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined time interval.
    func allowRequest() -> Bool {
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {
            return false
        }
        
        // If the time interval has passed, reset the request count and last request time.
        if TimeInterval(self.lastRequestTime) + self.timeInterval <= TimeInterval() {
            self.requestCount = 0
            self.lastRequestTime = TimeInterval()
        }
        
        // Increment the request count and return true.
        self.requestCount += 1
        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 {
    // The maximum number of requests that can be made within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests can be made.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The timestamp of the last request made within the defined time interval.
    private var lastRequestTime: TimeInterval
    
    // Initializes the rate limiter with the maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined time interval.
    func allowRequest() -> Bool {
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {

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) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = TimeInterval(0)
        self.requestCount = 0
    }
    
    func allowRequest() -> Bool {
        var currentTime = TimeInterval(Date.now.timeIntervalSinceDate(self.lastRequestTime))
        if currentTime > self.timeInterval {
            self.lastRequestTime = TimeInterval(Date.now)
            self.requestCount = 1
            return true
        } else if self.requestCount < self.maxRequests {
            self.requestCount += 1
            return true
        }
        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 lastRequestTime: TimeInterval
    private var requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = TimeInterval(0)
        self.requestCount = 0
    }
    
    func allowRequest() -> Bool {
        var currentTime = TimeInterval(Date.now.timeIntervalSinceDate(self.lastRequestTime))
        if currentTime > self.timeInterval {
            self.lastRequestTime = TimeInterval(Date.now)
            self.requestCount = 1
            return true
        } else if self.requestCount < self.maxRequests {
            self.requestCount += 1
            return true
        }
        return false
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    // Maximum number of requests allowed within the time interval.
    var maxRequests: Int
    // Time interval for which the rate limit applies.
    var timeInterval: TimeInterval
    // Timestamp of the last request made.
    var lastRequestTime: Timestamp
    // Number of requests made within the time interval.
    var requestCount: Int

    // Initializes the rate limiter with the maximum number of requests and the time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = 0
        self.requestCount = 0
    }

    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        // If the time interval has passed, reset the request count.
        if Date.now.timeIntervalSinceDate(self.lastRequestTime) >= self.timeInterval {
            self.requestCount = 0
            self.lastRequestTime = Date.now
        }
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {
            return false
        }
        // Increment the request count.
        self.requestCount += 1
        // Return true to indicate that a new request can be made.
        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 {
    // Maximum number of requests allowed within the time interval.
    var maxRequests: Int
    // Time interval for which the rate limit applies.
    var timeInterval: TimeInterval
    // Timestamp of the last request made.
    var lastRequestTime: Timestamp
    // Number of requests made within the time interval.
    var requestCount: Int

    // Initializes the rate limiter with the maximum number of requests and the time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = 0
        self.requestCount = 0
    }

    // Determines if a new request can be made within the defined limits.
    func allowRequest() -> Bool {
        // If the time interval has passed, reset the request count.
        if Date.now.timeIntervalSinceDate(self.lastRequestTime) >= self.timeInterval {
            self.requestCount = 0
            self.lastRequestTime = Date.now
        }
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {
            return false
        }
        // Increment the request count.
        self.requestCount += 1
        // Return true to indicate that a new request can be made.
        return true
    }
}
```

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
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestsMade = 0
        self._lastRequestTime = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        if self._requestsMade >= self._maxRequests {
            if (TimeInterval.now - self._lastRequestTime) < self._timeInterval {
                return false
            }
        }
        self._requestsMade += 1
        self._lastRequestTime = TimeInterval.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 _requestsMade: Int
    private var _lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestsMade = 0
        self._lastRequestTime = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        if self._requestsMade >= self._maxRequests {
            if (TimeInterval.now - self._lastRequestTime) < self._timeInterval {
                return false
            }
        }
        self._requestsMade += 1
        self._lastRequestTime = TimeInterval.now
        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 _requestsMade: Int
    private var _lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestsMade = 0
        self._lastRequestTime = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        if self._requestsMade >= self._maxRequests {
            if (TimeInterval.now - self._lastRequestTime) < self._timeInterval {
                return false
            }
        }
        self._requestsMade += 1
        self._lastRequestTime = TimeInterval.now
        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 _requestsMade: Int
    private var _lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestsMade = 0
        self._lastRequestTime = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        if self._requestsMade >= self._maxRequests {
            if (TimeInterval.now - self._lastRequestTime) < self._timeInterval {
                return false
            }
        }
        self._requestsMade += 1
        self._lastRequestTime = TimeInterval.now
        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 _requestsMade: Int
    private var _lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._timeInterval = timeInterval
        self._requestsMade = 0
        self._lastRequestTime = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        if self._requestsMade >= self._maxRequests {
            if (TimeInterval.now - self._lastRequestTime) < self._timeInterval {
                return false
            }
        }
        self._requestsMade += 1
        self._lastRequestTime = TimeInterval.now
        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 _requestsMade: Int
    private var _lastRequestTime: TimeInterval
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self._maxRequests = maxRequests
        self._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) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = TimeInterval(0)
        self.requestCount = 0
    }
    
    func allowRequest() -> Bool {
        if TimeInterval(0) - self.lastRequestTime > self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = TimeInterval(0)
            return true
        } else if self.requestCount < self.maxRequests {
            self.requestCount += 1
            self.lastRequestTime = TimeInterval(0)
            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 {
    private var maxRequests: Int
    private var timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval
    private var requestCount: Int
    
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
        self.lastRequestTime = TimeInterval(0)
        self.requestCount = 0
    }
    
    func allowRequest() -> Bool {
        if TimeInterval(0) - self.lastRequestTime > self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = TimeInterval(0)
            return true
        } else if self.requestCount < self.maxRequests {
            self.requestCount += 1
            self.lastRequestTime = TimeInterval(0)
            return true
        } else {
            return false
        }
    }
}
```

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    // The maximum number of requests allowed within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests is allowed.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The last time a request was made within the defined time interval.
    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.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined time interval.
    func allowRequest() -> Bool {
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {
            return false
        }
        // If the time interval has passed, reset the request count and last request time.
        if TimeInterval(self.lastRequestTime) + self.timeInterval < TimeInterval(Date()) {
            self.requestCount = 0
            self.lastRequestTime = TimeInterval(Date())
        }
        // Increment the request count and return true.
        self.requestCount += 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 {
    // The maximum number of requests allowed within the defined time interval.
    private var maxRequests: Int
    // The time interval in which the maximum number of requests is allowed.
    private var timeInterval: TimeInterval
    // The number of requests made within the defined time interval.
    private var requestCount: Int
    // The last time a request was made within the defined time interval.
    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.requestCount = 0
        self.lastRequestTime = TimeInterval(0)
    }
    
    // Determines if a new request can be made within the defined time interval.
    func allowRequest() -> Bool {
        // If the maximum number of requests has been reached, return false.
        if self.requestCount >= self.maxRequests {
            return false
        }
        // If the time interval has passed, reset the request count and last request time.
        if TimeInterval(self.lastRequestTime) + self.timeInterval < TimeInterval(Date()) {
            self.requestCount = 0
            self.lastRequestTime = TimeInterval(Date())
        }
        // Increment the request count and return true.
        self.requestCount += 1
        return true
    }
}
```

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 {
        var currentTime = TimeInterval()
        var elapsedTime = currentTime - self.lastRequestTime
        
        if elapsedTime >= self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = currentTime
            return true
        }
        
        if self.requestCount < self.maxRequests {
            self.requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }
        
        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 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 {
        var currentTime = TimeInterval()
        var elapsedTime = currentTime - self.lastRequestTime
        
        if elapsedTime >= self.timeInterval {
            self.requestCount = 1
            self.lastRequestTime = currentTime
            return true
        }
        
        if self.requestCount < self.maxRequests {
            self.requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }
        
        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 allowRequest() -> Bool {
        if self._requestCount >= self._maxRequests {
            if TimeInterval.now - self._lastRequestTime < self._timeInterval {
                return false
            }
        }
        self._requestCount += 1
        self._lastRequestTime = TimeInterval.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 = TimeInterval(0)
    }
    
    func allowRequest() -> Bool {
        if self._requestCount >= self._maxRequests {
            if TimeInterval.now - self._lastRequestTime < self._timeInterval {
                return false
            }
        }
        self._requestCount += 1
        self._lastRequestTime = TimeInterval.now
        return true
    }
}
```

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        return self.value
    }
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        guard let lock = self.lock else {
            return
        }
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        guard let lock = self.lock else {
            return 0
        }
        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 the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        return self.value
    }
}

// A thread-safe counter that can be accessed by multiple threads.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        guard let lock = self.lock else {
            return
        }
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        guard let lock = self.lock else {
            return 0
        }
        return self.value
    }
}

// A thread-safe counter that can be accessed by multiple threads.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        guard let lock = self.lock else {
            return
        }
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        guard let lock = self.lock else {
            return 0
        }
        return self.value
    }
}

// A thread-safe counter that can be accessed by multiple threads.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        guard let lock = self.lock else {
            return
        }
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        guard let lock = self.lock else {
            return 0
        }
        return self.value
    }
}

// A thread-safe counter that can be accessed by multiple threads.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        guard let lock = self.lock else {
            return
        }
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        guard let lock = self.lock else {
            return 0
        }
        return self.value
    }
}

// A thread-safe counter that can be accessed by multiple threads.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        guard let lock = self.lock else {
            return
        }
        self.value += 1
    }
    // Get the current value of the counter.
    func currentValue() -> Int {
        guard let lock = self.lock else {
            return 0
        }
        return self.value
    }
}

// A thread-safe counter that can be accessed by multiple threads.
class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Current value of the counter.
    var value: Int
    // Create a new counter with the initial value.
    init(value: Int) {
        self.value = value
    }
    // Increment the counter by one.
    func increment() {
        guard let lock = self.lock else {
            return

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        value += 1
    }

    // Return current value of counter.
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Lock for read and write operations.
    private var lock: Lock

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.lock = Lock()
    }

    // Increment counter.
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        lock.lock()
        var result = value
        lock.unlock()
        return result
    }
}

class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Semaphore for read and write operations.
    private var semaphore: Semaphore

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.semaphore = Semaphore(count: 1)
    }

    // Increment counter.
    func increment() {
        semaphore.wait()
        value += 1
        semaphore.signal()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        semaphore.wait()
        var result = value
        semaphore.signal()
        return result
    }
}

class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Barrier for read and write operations.
    private var barrier: Barrier

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.barrier = Barrier(count: 2)
    }

    // Increment counter.
    func increment() {
        barrier.wait()
        value += 1
        barrier.signal()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        barrier.wait()
        var result = value
        barrier.signal()
        return result
    }
}

class ThreadSafeCounterWithBarrierAndLock: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Barrier for read and write operations.
    private var barrier: Barrier
    // Lock for read and write operations.
    private var lock: Lock

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.barrier = Barrier(count: 2)
        self.lock = Lock()
    }

    // Increment counter.
    func increment() {
        lock.lock()
        barrier.wait()
        value += 1
        barrier.signal()
        lock.unlock()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        lock.lock()
        var result = value
        lock.unlock()
        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 {
    // Value of counter.
    private var value: Int

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
    }

    // Increment counter.
    func increment() {
        value += 1
    }

    // Return current value of counter.
    func currentValue() -> Int {
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Lock for read and write operations.
    private var lock: Lock

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.lock = Lock()
    }

    // Increment counter.
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        lock.lock()
        var result = value
        lock.unlock()
        return result
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Semaphore for read and write operations.
    private var semaphore: Semaphore

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.semaphore = Semaphore(count: 1)
    }

    // Increment counter.
    func increment() {
        semaphore.wait()
        value += 1
        semaphore.signal()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        semaphore.wait()
        var result = value
        semaphore.signal()
        return result
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Barrier for read and write operations.
    private var barrier: Barrier

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.barrier = Barrier(count: 2)
    }

    // Increment counter.
    func increment() {
        barrier.wait()
        value += 1
        barrier.signal()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        barrier.wait()
        var result = value
        barrier.signal()
        return result
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrierAndLock: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Barrier for read and write operations.
    private var barrier: Barrier
    // Lock for read and write operations.
    private var lock: Lock

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.barrier = Barrier(count: 2)
        self.lock = Lock()
    }

    // Increment counter.
    func increment() {
        lock.lock()
        barrier.wait()
        value += 1
        barrier.signal()
        lock.unlock()
    }

    // Return current value of counter.
    func currentValue() -> Int {
        lock.lock()
        var result = value
        lock.unlock()
        return result
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrierAndSemaphore: ThreadSafeCounterProtocol {
    // Value of counter.
    private var value: Int
    // Barrier for read and write operations.
    private var barrier: Barrier
    // Semaphore for read and write operations.
    private var semaphore: Semaphore

    // Initialize counter with initial value.
    init(value: Int) {
        self.value = value
        self.barrier = Barrier(count: 2)
        self.semaphore = Semaphore(count:

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        _lock.lock()
        _value += 1
        _lock.unlock()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

class LimitedConcurrentCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, concurrencyLimit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(concurrencyLimit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return 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 {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        _lock.lock()
        _value += 1
        _lock.unlock()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Counter with limited number of concurrent increments.
// Thread-safe for read and write operations.
class LimitedConcurrentCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, concurrencyLimit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(concurrencyLimit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Counter with limited number of concurrent increments.
// Thread-safe for read and write operations.
class LimitedConcurrentCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, concurrencyLimit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(concurrencyLimit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Counter with limited number of concurrent increments.
// Thread-safe for read and write operations.
class LimitedConcurrentCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, concurrencyLimit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(concurrencyLimit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Counter with limited number of concurrent increments.
// Thread-safe for read and write operations.
class LimitedConcurrentCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, concurrencyLimit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(concurrencyLimit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Counter with limited number of concurrent increments.
// Thread-safe for read and write operations.
class LimitedConcurrentCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, concurrencyLimit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(concurrencyLimit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Counter with limited number of concurrent increments.
// Thread-safe for read and write operations.
class LimitedConcurrentCounter: ThreadSafeCounterProtocol

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        self._value += 1
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _lock: Lock = Lock()
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _lock.lock()
        self._value += 1
        _lock.unlock()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _semaphore: Semaphore = Semaphore(0)
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _semaphore.wait()
        self._value += 1
        _semaphore.signal()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _barrier: Barrier = Barrier(0)
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _barrier.wait()
        self._value += 1
        _barrier.signal()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _condition: Condition = Condition()
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _condition.wait()
        self._value += 1
        _condition.signal()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _barrier: Barrier = Barrier(0)
    private var _condition: Condition = Condition()
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _barrier.wait()
        self._value += 1
        _condition.signal()
        _barrier.signal()
    }
    
    // Get current value.
    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 {
    private var _value: Int = 0
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        self._value += 1
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _lock: Lock = Lock()
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _lock.lock()
        self._value += 1
        _lock.unlock()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _semaphore: Semaphore = Semaphore(0)
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _semaphore.wait()
        self._value += 1
        _semaphore.signal()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _barrier: Barrier = Barrier(0)
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _barrier.wait()
        self._value += 1
        _barrier.signal()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _condition: Condition = Condition()
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _condition.wait()
        self._value += 1
        _condition.signal()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _barrier: Barrier = Barrier(0)
    private var _condition: Condition = Condition()
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {
        _barrier.wait()
        self._value += 1
        _condition.signal()
        _barrier.signal()
    }
    
    // Get current value.
    func currentValue() -> Int {
        return self._value
    }
}

// Basic number counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLockAndCondition: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    private var _lock: Lock = Lock()
    private var _condition: Condition = Condition()
    
    // Init with initial value.
    init(value: Int) {
        self._value = value
    }
    
    // Increment counter.
    func increment() {

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment() {
        self._value += 1
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterBy: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment(by: Int) {
        self._value += by
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterByFloat: ThreadSafeCounterProtocol {
    private var _value: Float = 0.0
    
    init(value: Float) {
        self._value = value
    }
    
    func increment(by: Float) {
        self._value += by
    }
    
    func currentValue() -> Float {
        return self._value
    }
}

class ThreadSafeCounterByFloatBy: ThreadSafeCounterProtocol {
    private var _value: Float = 0.0
    
    init(value: Float) {
        self._value = value
    }
    
    func increment(by: Float) {
        self._value += by
    }
    
    func currentValue() -> Float {
        return self._value
    }
}

class ThreadSafeCounterByInt: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment(by: Int) {
        self._value += by
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterByIntBy: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment(by: Int) {
        self._value += by
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterByDouble: ThreadSafeCounterProtocol {
    private var _value: Double = 0.0
    
    init(value: Double) {
        self._value = value
    }
    
    func increment(by: Double) {
        self._value += by
    }
    
    func currentValue() -> Double {
        return self._value
    }
}

class ThreadSafeCounterByDoubleBy: ThreadSafeCounterProtocol {
    private var _value: Double = 0.0
    
    init(value: Double) {
        self._value = value
    }
    
    func increment(by: Double) {
        self._value += by
    }
    
    func currentValue() -> Double {
        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 {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment() {
        self._value += 1
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterBy: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment(by: Int) {
        self._value += by
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByFloat: ThreadSafeCounterProtocol {
    private var _value: Float = 0.0
    
    init(value: Float) {
        self._value = value
    }
    
    func increment(by: Float) {
        self._value += by
    }
    
    func currentValue() -> Float {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByFloatBy: ThreadSafeCounterProtocol {
    private var _value: Float = 0.0
    
    init(value: Float) {
        self._value = value
    }
    
    func increment(by: Float) {
        self._value += by
    }
    
    func currentValue() -> Float {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByInt: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment(by: Int) {
        self._value += by
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByIntBy: ThreadSafeCounterProtocol {
    private var _value: Int = 0
    
    init(value: Int) {
        self._value = value
    }
    
    func increment(by: Int) {
        self._value += by
    }
    
    func currentValue() -> Int {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByDouble: ThreadSafeCounterProtocol {
    private var _value: Double = 0.0
    
    init(value: Double) {
        self._value = value
    }
    
    func increment(by: Double) {
        self._value += by
    }
    
    func currentValue() -> Double {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByDoubleBy: ThreadSafeCounterProtocol {
    private var _value: Double = 0.0
    
    init(value: Double) {
        self._value = value
    }
    
    func increment(by: Double) {
        self._value += by
    }
    
    func currentValue() -> Double {
        return self._value
    }
}

// Thread-safe counter with possibility to increment counter by a given number and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterByLong: ThreadSafeCounterProtocol {
    private var _value: Long = 0
    
    init(value: Long) {
        self._value = value
    }
    
    func increment(by: Long) {
        self._value += by
    }
    
    func currentValue() -> Long {

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

class ThreadSafeCounterWithMultipleThreads: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

class ThreadSafeCounterWithMultipleThreadsWithLocking: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

class ThreadSafeCounterWithMultipleThreadsWithLockingAndCondition: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _condition: Condition

    init(value: Int) {
        _value = value
        _lock = Lock()
        _condition = Condition()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
            _condition.broadcast()
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            while (_value == 0) {
                _condition.wait(_lock)
            }
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

class ThreadSafeCounterWithMultipleThreadsWithLockingAndConditionAndBarrier: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _condition: Condition
    var _barrier: Barrier

    init(value: Int) {
        _value = value
        _lock = Lock()
        _condition = Condition()
        _barrier = Barrier(count: 2)
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
            _barrier.wait()
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            while (_value == 0) {
                _condition.wait(_lock)
            }
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

```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 {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

// A counter that can be incremented and decremented by multiple threads.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithMultipleThreads: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

// A counter that can be incremented and decremented by multiple threads.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithMultipleThreadsWithLocking: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

// A counter that can be incremented and decremented by multiple threads.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithMultipleThreadsWithLockingAndCondition: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _condition: Condition

    init(value: Int) {
        _value = value
        _lock = Lock()
        _condition = Condition()
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
            _condition.broadcast()
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            while (_value == 0) {
                _condition.wait(_lock)
            }
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

// A counter that can be incremented and decremented by multiple threads.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithMultipleThreadsWithLockingAndConditionAndBarrier: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _condition: Condition
    var _barrier: Barrier

    init(value: Int) {
        _value = value
        _lock = Lock()
        _condition = Condition()
        _barrier = Barrier(count: 2)
    }

    func increment() {
        guard(_lock.tryLock()) {
            _value += 1
            _barrier.wait()
        } else {
            print("Failed to acquire lock")
        }
    }

    func currentValue() -> Int {
        guard(_lock.tryLock()) {
            while (_value == 0) {
                _condition.wait(_lock)
            }
            return _value
        } else {
            print("Failed to acquire lock")
            return 0
        }
    }
}

// A counter that can be incremented and decremented by multiple threads.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithMultipleThreadsWithLockingAndConditionAndBarrierAndSemaphore: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _condition: Condition
    var _barrier: Barrier
    var _semaphore

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    var counter: Int
    
    init(value: Int) {
        self.counter = value
    }
    
    func increment() {
        self.counter += 1
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    var counter: Int
    var lock: Lock
    
    init(value: Int) {
        self.counter = value
        self.lock = Lock()
    }
    
    func increment() {
        lock.lock()
        self.counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    var counter: Int
    var semaphore: Semaphore
    
    init(value: Int) {
        self.counter = value
        self.semaphore = Semaphore(count: 1)
    }
    
    func increment() {
        semaphore.wait()
        self.counter += 1
        semaphore.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    var counter: Int
    var barrier: Barrier
    
    init(value: Int) {
        self.counter = value
        self.barrier = Barrier(count: 1)
    }
    
    func increment() {
        barrier.wait()
        self.counter += 1
        barrier.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    var counter: Int
    var condition: Condition
    
    init(value: Int) {
        self.counter = value
        self.condition = Condition()
    }
    
    func increment() {
        condition.wait(in: self)
        self.counter += 1
        condition.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

class ThreadSafeCounterWithSemaphoreAndCondition: ThreadSafeCounterProtocol {
    var counter: Int
    var semaphore: Semaphore
    var condition: Condition
    
    init(value: Int) {
        self.counter = value
        self.semaphore = Semaphore(count: 1)
        self.condition = Condition()
    }
    
    func increment() {
        semaphore.wait()
        self.counter += 1
        condition.signal()
        semaphore.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    var counter: Int
    var barrier: Barrier
    var condition: Condition
    
    init(value: Int) {
        self.counter = value
        self.barrier = Barrier(count: 1)
        self.condition = Condition()
    }
    
    func increment() {
        barrier.wait()
        self.counter += 1
        condition.signal()
        barrier.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

```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 {
    var counter: Int
    
    init(value: Int) {
        self.counter = value
    }
    
    func increment() {
        self.counter += 1
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    var counter: Int
    var lock: Lock
    
    init(value: Int) {
        self.counter = value
        self.lock = Lock()
    }
    
    func increment() {
        lock.lock()
        self.counter += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    var counter: Int
    var semaphore: Semaphore
    
    init(value: Int) {
        self.counter = value
        self.semaphore = Semaphore(count: 1)
    }
    
    func increment() {
        semaphore.wait()
        self.counter += 1
        semaphore.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    var counter: Int
    var barrier: Barrier
    
    init(value: Int) {
        self.counter = value
        self.barrier = Barrier(count: 1)
    }
    
    func increment() {
        barrier.wait()
        self.counter += 1
        barrier.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    var counter: Int
    var condition: Condition
    
    init(value: Int) {
        self.counter = value
        self.condition = Condition()
    }
    
    func increment() {
        condition.wait(in: self)
        self.counter += 1
        condition.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphoreAndCondition: ThreadSafeCounterProtocol {
    var counter: Int
    var semaphore: Semaphore
    var condition: Condition
    
    init(value: Int) {
        self.counter = value
        self.semaphore = Semaphore(count: 1)
        self.condition = Condition()
    }
    
    func increment() {
        semaphore.wait()
        self.counter += 1
        condition.signal()
        semaphore.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    var counter: Int
    var barrier: Barrier
    var condition: Condition
    
    init(value: Int) {
        self.counter = value
        self.barrier = Barrier(count: 1)
        self.condition = Condition()
    }
    
    func increment() {
        barrier.wait()
        self.counter += 1
        condition.signal()
        barrier.signal()
    }
    
    func currentValue() -> Int {
        return self.counter
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithConditionAndSemaphore: ThreadSafeCounterProtocol {
    var counter: Int
    var condition: Condition
    var semaphore: Semaphore
    
    init(value: Int) {
        self.counter = value
        self.condition = Condition()
        self.semaphore = Semaphore(count: 1)
    }
    

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var _value: Int
    
    init(value: Int) {
        _value = value
    }
    
    func increment() {
        _value += 1
    }
    
    func currentValue() -> Int {
        return _value
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _lock: Lock
    
    init(value: Int) {
        _value = value
        _lock = Lock()
    }
    
    func increment() {
        _lock.lock()
        _value += 1
        _lock.unlock()
    }
    
    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _semaphore: Semaphore
    
    init(value: Int) {
        _value = value
        _semaphore = Semaphore(count: 1)
    }
    
    func increment() {
        _semaphore.wait()
        _value += 1
        _semaphore.signal()
    }
    
    func currentValue() -> Int {
        _semaphore.wait()
        let value = _value
        _semaphore.signal()
        return value
    }
}

class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _barrier: Barrier
    
    init(value: Int) {
        _value = value
        _barrier = Barrier(count: 2)
    }
    
    func increment() {
        _barrier.wait()
        _value += 1
        _barrier.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        let value = _value
        _barrier.signal()
        return value
    }
}

class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _condition: Condition
    
    init(value: Int) {
        _value = value
        _condition = Condition()
    }
    
    func increment() {
        _condition.wait()
        _value += 1
        _condition.signal()
    }
    
    func currentValue() -> Int {
        _condition.wait()
        let value = _value
        _condition.signal()
        return value
    }
}

class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _barrier: Barrier
    private var _condition: Condition
    
    init(value: Int) {
        _value = value
        _barrier = Barrier(count: 2)
        _condition = Condition()
    }
    
    func increment() {
        _barrier.wait()
        _value += 1
        _barrier.signal()
        _condition.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        let value = _value
        _barrier.signal()
        _condition.wait()
        return 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 {
    private var _value: Int
    
    init(value: Int) {
        _value = value
    }
    
    func increment() {
        _value += 1
    }
    
    func currentValue() -> Int {
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _lock: Lock
    
    init(value: Int) {
        _value = value
        _lock = Lock()
    }
    
    func increment() {
        _lock.lock()
        _value += 1
        _lock.unlock()
    }
    
    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithSemaphore: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _semaphore: Semaphore
    
    init(value: Int) {
        _value = value
        _semaphore = Semaphore(count: 1)
    }
    
    func increment() {
        _semaphore.wait()
        _value += 1
        _semaphore.signal()
    }
    
    func currentValue() -> Int {
        _semaphore.wait()
        let value = _value
        _semaphore.signal()
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrier: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _barrier: Barrier
    
    init(value: Int) {
        _value = value
        _barrier = Barrier(count: 2)
    }
    
    func increment() {
        _barrier.wait()
        _value += 1
        _barrier.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        let value = _value
        _barrier.signal()
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithCondition: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _condition: Condition
    
    init(value: Int) {
        _value = value
        _condition = Condition()
    }
    
    func increment() {
        _condition.wait()
        _value += 1
        _condition.signal()
    }
    
    func currentValue() -> Int {
        _condition.wait()
        let value = _value
        _condition.signal()
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrierAndCondition: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _barrier: Barrier
    private var _condition: Condition
    
    init(value: Int) {
        _value = value
        _barrier = Barrier(count: 2)
        _condition = Condition()
    }
    
    func increment() {
        _barrier.wait()
        _value += 1
        _barrier.signal()
        _condition.signal()
    }
    
    func currentValue() -> Int {
        _barrier.wait()
        let value = _value
        _barrier.signal()
        _condition.wait()
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterWithBarrierAndConditionAndSemaphore: ThreadSafeCounterProtocol {
    private var _value: Int
    private var _barrier: Barrier
    private var _condition: Condition
    private var _semaphore: Semaphore
    
    init(value: Int) {
        _value = value
        _barrier = Barrier(count: 2)
        _condition = Condition()
        _semaphore = Semaphore(count: 1)
    }
    
    func

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        _lock.lock()
        _value += 1
        _lock.unlock()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

class ThreadSafeLimitedCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, limit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(count: limit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return 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 {
    var _value: Int
    var _lock: Lock

    init(value: Int) {
        _value = value
        _lock = Lock()
    }

    func increment() {
        _lock.lock()
        _value += 1
        _lock.unlock()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Thread-safe counter with limited number of concurrent threads.
// Thread-safe for read and write operations.
class ThreadSafeLimitedCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, limit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(count: limit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Thread-safe counter with limited number of concurrent threads.
// Thread-safe for read and write operations.
class ThreadSafeLimitedCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, limit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(count: limit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Thread-safe counter with limited number of concurrent threads.
// Thread-safe for read and write operations.
class ThreadSafeLimitedCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, limit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(count: limit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Thread-safe counter with limited number of concurrent threads.
// Thread-safe for read and write operations.
class ThreadSafeLimitedCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, limit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(count: limit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Thread-safe counter with limited number of concurrent threads.
// Thread-safe for read and write operations.
class ThreadSafeLimitedCounter: ThreadSafeCounterProtocol {
    var _value: Int
    var _lock: Lock
    var _semaphore: Semaphore

    init(value: Int, limit: Int) {
        _value = value
        _lock = Lock()
        _semaphore = Semaphore(count: limit)
    }

    func increment() {
        _semaphore.wait()
        _lock.lock()
        _value += 1
        _lock.unlock()
        _semaphore.signal()
    }

    func currentValue() -> Int {
        _lock.lock()
        let value = _value
        _lock.unlock()
        return value
    }
}

// Thread-safe counter with limited number of concurrent

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        self._value += 1
    }
    
    // Accessing current counter value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithLock: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithLockAndCondition: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithLockAndConditionAndSemaphore: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithLockAndConditionAndSemaphoreAndBarrier: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    func currentValue() -> Int {
        return self._value
    }
}

class ThreadSafeCounterWithLockAndConditionAndSemaphoreAndBarrierAndBarrier: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    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 {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        self._value += 1
    }
    
    // Accessing current counter value.
    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 {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    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 {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    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 ThreadSafeCounterWithLockAndConditionAndSemaphore: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    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 ThreadSafeCounterWithLockAndConditionAndSemaphoreAndBarrier: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    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 ThreadSafeCounterWithLockAndConditionAndSemaphoreAndBarrierAndBarrier: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing counter.
    func increment() {
        // Acquiring lock.
        lock {
            self._value += 1
        }
    }
    
    // Accessing current counter value.
    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 ThreadSafeCounterWithLockAndConditionAndSemaphoreAndBarrierAndBarrierAndSemaphore: ThreadSafeCounterProtocol {
    // Thread-safe counter value.
    private var _value: Int = 0
    
    // Initializing constructor.
    init(value: Int) {
        self._value = value
    }
    
    // Incrementing 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 of the pipeline
    var value: Output
    
    // Initializer
    init(value: Output) {
        self.value = value
    }
    
    // Transformation function
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let next = transform(self.value)
        return Pipeline<U>(value: next)
    }
    
    // Execute the pipeline
    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>: PipelineProtocol {
    associatedtype Output
    
    // Initial value of the pipeline
    var value: Output
    
    // Initializer
    init(value: Output) {
        self.value = value
    }
    
    // Transformation function
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let next = transform(self.value)
        return Pipeline<U>(value: next)
    }
    
    // Execute the pipeline
    func execute() -> Output {
        return self.value
    }
}

// Example usage
let pipeline = Pipeline<Int>(value: 1)
    .pipe(transform: { $0 + 1 })
    .pipe(transform: { $0 * 2 })
    .pipe(transform: { $0 - 3 })
    .pipe(transform: { $0 / 2 })
    .execute()

print(pipeline) // Output: 0
```

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> {
        let transformedValue = transform(self.value)
        return Pipeline<U>(transformedValue)
    }
    
    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>: PipelineProtocol {
    associatedtype Output
    var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let transformedValue = transform(self.value)
        return Pipeline<U>(transformedValue)
    }
    
    func execute() -> Output {
        return self.value
    }
}

// Example usage:
let pipeline = Pipeline<Int>(10)
    .pipe(transform1)
    .pipe(transform2)
    .pipe(transform3)
    .pipe(transform4)
    .pipe(transform5)
    .pipe(transform6)
    .pipe(transform7)
    .pipe(transform8)
    .pipe(transform9)
    .pipe(transform10)
    .pipe(transform11)
    .pipe(transform12)
    .pipe(transform13)
    .pipe(transform14)
    .pipe(transform15)
    .pipe(transform16)
    .pipe(transform17)
    .pipe(transform18)
    .pipe(transform19)
    .pipe(transform20)
    .pipe(transform21)
    .pipe(transform22)
    .pipe(transform23)
    .pipe(transform24)
    .pipe(transform25)
    .pipe(transform26)
    .pipe(transform27)
    .pipe(transform28)
    .pipe(transform29)
    .pipe(transform30)
    .pipe(transform31)
    .pipe(transform32)
    .pipe(transform33)
    .pipe(transform34)
    .pipe(transform35)
    .pipe(transform36)
    .pipe(transform37)
    .pipe(transform38)
    .pipe(transform39)
    .pipe(transform40)
    .pipe(transform41)
    .pipe(transform42)
    .pipe(transform43)
    .pipe(transform44)
    .pipe(transform45)
    .pipe(transform46)
    .pipe(transform47)
    .pipe(transform48)
    .pipe(transform49)
    .pipe(transform50)
    .pipe(transform51)
    .pipe(transform52)
    .pipe(transform53)
    .pipe(transform54)
    .pipe(transform55)
    .pipe(transform56)
    .pipe(transform57)
    .pipe(transform58)
    .pipe(transform59)
    .pipe(transform60)
    .pipe(transform61)
    .pipe(transform62)
    .pipe(transform63)
    .pipe(transform64)
    .pipe(transform65)
    .pipe(transform66)
    .pipe(transform67)
    .pipe(transform68)
    .pipe(transform69)
    .pipe(transform70)
    .pipe(transform71)
    .pipe(transform72)
    .pipe(transform73)
    .pipe(transform74)
    .pipe(transform75)
    .pipe(transform76)
    .pipe(transform77)
    .pipe(transform78)
    .pipe(transform79)
    .pipe(transform80)
    .pipe(transform81)
    .pipe(transform82)
    .pipe(transform83)
    .pipe(transform84)
    .pipe(transform85)
    .pipe(transform86)
    .pipe(transform87)
    .pipe(transform88)
    .pipe(transform89)
    .pipe(transform90)
    .pipe(transform91)
    .pipe(transform92)
    .pipe(transform93)
    .pipe(transform94)
    .pipe(transform95)
    .pipe(transform96)
    .pipe(transform97)
    .pipe(transform98)
    .pipe(transform99)
    .pipe(transform100)
    .execute()
```

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 for the pipeline.
    private var _value: Output
    
    // Initial value for the pipeline.
    init(value: Output) {
        _value = value
    }
    
    // Apply a transformation to the pipeline.
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let transformedValue = transform(_value)
        return Pipeline<U>(_value: transformedValue)
    }
    
    // Execute the pipeline and return 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 for the pipeline.
    private var _value: Output
    
    // Initial value for the pipeline.
    init(value: Output) {
        _value = value
    }
    
    // Apply a transformation to the pipeline.
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let transformedValue = transform(_value)
        return Pipeline<U>(_value: transformedValue)
    }
    
    // Execute the pipeline and return the final output.
    func execute() -> Output {
        return _value
    }
}
```

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 of the pipeline
    private var value: Output
    
    // Initializer
    init(value: Output) {
        self.value = value
    }
    
    // Transformation method
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let pipeline = Pipeline<U>(transform(value))
        pipeline.value = value
        return pipeline
    }
    
    // Execution method
    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 of the pipeline
    private var value: Output
    
    // Initializer
    init(value: Output) {
        self.value = value
    }
    
    // Transformation method
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let pipeline = Pipeline<U>(transform(value))
        pipeline.value = value
        return pipeline
    }
    
    // Execution method
    func execute() -> Output {
        return value
    }
}

// Example usage
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> {
        let newPipeline = Pipeline<U>(transform(value))
        newPipeline.value = transform(value)
        return newPipeline
    }
    
    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> {
        let newPipeline = Pipeline<U>(transform(value))
        newPipeline.value = transform(value)
        return newPipeline
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(10)
    .pipe(x -> x * 2)
    .pipe(x -> x + 1)
    .pipe(x -> x.toString())
    .execute()

print(pipeline) // Output: "12"
```

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> {
        let transformedValue = transform(self.value)
        return Pipeline<U>(transformedValue)
    }
    
    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> {
        let transformedValue = transform(self.value)
        return Pipeline<U>(transformedValue)
    }
    
    func execute() -> Output {
        return value
    }
}
```

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 initialValue: Output
    var transformations: [@escaping (Output) -> Output]
    
    init(initialValue: Output, transformations: [@escaping (Output) -> Output]) {
        self.initialValue = initialValue
        self.transformations = transformations
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newTransformations = self.transformations + [transform]
        return Pipeline<U>(initialValue: self.execute(), transformations: newTransformations)
    }
    
    func execute() -> Output {
        var output = self.initialValue
        for transform in self.transformations {
            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 {
    var initialValue: Output
    var transformations: [@escaping (Output) -> Output]
    
    init(initialValue: Output, transformations: [@escaping (Output) -> Output]) {
        self.initialValue = initialValue
        self.transformations = transformations
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        let newTransformations = self.transformations + [transform]
        return Pipeline<U>(initialValue: self.execute(), transformations: newTransformations)
    }
    
    func execute() -> Output {
        var output = self.initialValue
        for transform in self.transformations {
            output = transform(output)
        }
        return output
    }
}

// Example usage
let result = Pipeline(initialValue: 1, transformations: [
    { |x| x + 1 },
    { |x| x * 2 },
    { |x| x - 1 }
]).pipe(
    { |x| x / 2 }
).pipe(
    { |x| x * 5 }
).execute()

print(result) // Output: 10
```

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
    }
    
    // Pipe a function to transform the output of the pipeline.
    // The function should take the output of the previous transformation and return the transformed output.
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(transform(self.value))
    }
    
    // Execute the pipeline, returning the final output.
    func execute() -> Output {
        return value
    }
}

func multiplyBy2(x: Int) -> Int {
    return x * 2
}

func add5(x: Int) -> Int {
    return x + 5
}

func multiplyBy3(x: Int) -> Int {
    return x * 3
}

```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
    }
    
    // Pipe a function to transform the output of the pipeline.
    // The function should take the output of the previous transformation and return the transformed output.
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(transform(self.value))
    }
    
    // Execute the pipeline, returning the final output.
    func execute() -> Output {
        return value
    }
}

// Example usage
let pipeline = Pipeline<Int>(10)
    .pipe(multiplyBy2)
    .pipe(add5)
    .pipe(multiplyBy3)
    .execute()
print(pipeline) // Output: 30

// Function to multiply a number by 2
func multiplyBy2(x: Int) -> Int {
    return x * 2
}

// Function to add 5 to a number
func add5(x: Int) -> Int {
    return x + 5
}

// Function to multiply a number by 3
func multiplyBy3(x: Int) -> Int {
    return x * 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> {
        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 U
    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 pipeline builder for the first step of a pipeline.
// The first step in the pipeline is the initial value.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the pipeline.
// The initial value is the output of the first step of the 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 {
    associatedtype U
    
    var initialValue: Output
    var transforms: [@escaping (Output) -> U]
    
    init(_ initialValue: Output) {
        self.initialValue = initialValue
        self.transforms = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        self.transforms.append(transform)
        return self
    }
    
    func execute() -> Output {
        var value = self.initialValue
        for transform in self.transforms {
            value = transform(value)
        }
        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 initialValue: Output
    var transforms: [@escaping (Output) -> U]
    
    init(_ initialValue: Output) {
        self.initialValue = initialValue
        self.transforms = []
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        self.transforms.append(transform)
        return self
    }
    
    func execute() -> Output {
        var value = self.initialValue
        for transform in self.transforms {
            value = transform(value)
        }
        return value
    }
}

// Example usage:
let pipeline = Pipeline(initialValue: 1)
    .pipe(transform1)
    .pipe(transform2)
    .pipe(transform3)
    .execute()

// Output: 3
```

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

    // A list of observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = []

    // Initialize the property with the given value.
    init(value: Value) {
        self.value = value
    }

    // Subscribe to changes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        observers[UUID()] = observer
        return UUID()
    }

    // Unsubscribe from changes to the property.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }

    // Notify all observers of changes to the property.
    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 current value of the property.
    var value: Value

    // A list of observers of the property.
    private var observers: [UUID: @escaping (Value) -> Void] = []

    // Initialize the property with the given value.
    init(value: Value) {
        self.value = value
    }

    // Subscribe to changes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        observers[UUID()] = observer
        return UUID()
    }

    // Unsubscribe from changes to the property.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }

    // Notify all observers of changes to the property.
    func notifyObservers() {
        for observer in observers {
            observer(self.value)
        }
    }
}

// Example usage:
let counter = ObservableProperty(0)
let observer = counter.subscribe(func(value) {
    print("Counter changed to \(value)")
})
counter.value = 10
counter.unsubscribe(observer)
```

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 UUID of the current subscription.
    private var currentSubscription: UUID? = nil
    // The initial value of the property.
    private var initialValue: Value
    // The type of the property.
    public var type: Type
    // The name of the property.
    public var name: String

    // Initializes the property with the given initial value.
    init(value: Value, name: String, type: Type) {
        self.value = value
        self.initialValue = value
        self.type = type
        self.name = name
    }

    // Returns the current value of the property.
    func value() -> Value {
        return self.value
    }

    // Sets the current value of the property to the given value.
    func setValue(_ value: Value) {
        if self.value == value {
            return
        }
        self.value = value
        // Notify observers of the property.
        for _, observer in self.observers {
            observer(value)
        }
    }

    // Subscribes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self.currentSubscription = UUID()
        self.observers[self.currentSubscription] = observer
        return self.currentSubscription!
    }

    // Unsubscribes from the property.
    func unsubscribe(_ observer: UUID) {
        self.observers.remove(forKey: observer)
    }
}

class 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 subscribed to the property.
    private var observers: [UUID: @escaping (Value) -> Void] = {}
    // The UUID of the current subscription.
    private var currentSubscription: UUID? = nil
    // The initial value of the property.
    private var initialValue: Value
    // The type of the property.
    public var type: Type
    // The name of the property.
    public var name: String

    // Initializes the property with the given initial value.
    init(value: Value, name: String, type: Type) {
        self.value = value
        self.initialValue = value
        self.type = type
        self.name = name
    }

    // Returns the current value of the property.
    func value() -> Value {
        return self.value
    }

    // Sets the current value of the property to the given value.
    func setValue(_ value: Value) {
        if self.value == value {
            return
        }
        self.value = value
        // Notify observers of the property.
        for _, observer in self.observers {
            observer(value)
        }
    }

    // Subscribes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self.currentSubscription = UUID()
        self.observers[self.currentSubscription] = observer
        return self.currentSubscription!
    }

    // Unsubscribes from the property.
    func unsubscribe(_ observer: UUID) {
        self.observers.remove(forKey: observer)
    }
}

// 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 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 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 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 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 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 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 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 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 ObservablePropertyProtocol {
    associatedtype 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 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 _observersLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwner: Any? = nil
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLock: Lock = Lock()
    // The observers of the property.
    private var _observersLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwnerLockOwner

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 a new instance of the `ObservableProperty` class.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property.
    func notify(_ value: Value) {
        for observer in observers {
            observer(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 a new instance of the `ObservableProperty` class.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property.
    func notify(_ value: Value) {
        for observer in observers {
            observer(value)
        }
    }
}

// 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 a new instance of the `ObservableProperty` class.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property.
    func notify(_ value: Value) {
        for observer in observers {
            observer(value)
        }
    }
}

// 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 a new instance of the `ObservableProperty` class.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property.
    func notify(_ value: Value) {
        for observer in observers {
            observer(value)
        }
    }
}

// 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 a new instance of the `ObservableProperty` class.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribes to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property.
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    // Notifies all observers of the property.
    func notify(_ value: Value) {
        for observer in observers {
            observer(value)
        }
    }
}

// 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 a new instance of the `ObservableProperty` class.
    init(value: 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 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 observer ID of the property.
    private var observerID: UUID = UUID()
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.
    private var observerIDCount: Int = 0
    // The observer ID of the property.

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 {
    var value: Value
    private var observers: [UUID: @escaping (Value) -> Void] = [:]
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        observers[UUID()]= observer
        return UUID()
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    func (self) subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        return self.subscribe(observer: observer)
    }
    
    func (self) unsubscribe(_ observer: UUID) {
        self.unsubscribe(observer: observer)
    }
}

```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 {
    var value: Value
    private var observers: [UUID: @escaping (Value) -> Void] = [:]
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        observers[UUID()]= observer
        return UUID()
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.remove(forKey: observer)
    }
    
    func (self) subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        return self.subscribe(observer: observer)
    }
    
    func (self) unsubscribe(_ observer: UUID) {
        self.unsubscribe(observer: observer)
    }
}
```

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 of the property.
    private var _observers: [UUID: @escaping (Value) -> Void] = []
    // The observers of the property.
    private var _observersLock = Lock()
    // The observers of the property.
    private var _observersCount: Int = 0
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observersCountLock = Lock()
    // The observers of the property.
    private var _observers

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()
        self._observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for 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 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()
        self._observers[id] = observer
        return id
    }
    
    // Unsubscribes from the property's value changes.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notifies all observers of the property's value changes.
    func notifyObservers() {
        for 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 value of the property.
    var value: Value
    // The observers of the property.
    var observers: [UUID: @escaping (Value) -> Void]
    // The UUID of the current observer.
    private var currentObserver: UUID?
    // The UUID of the previous observer.
    private var previousObserver: UUID?
    // The block that is called when the property is initialized.
    private var initializer: @escaping (Value) -> Void
    // The block that is called when the property is disposed.
    private var disposer: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subscription: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubscription: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var disposal: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var observer: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var disobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subsubobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subsubsubobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubsubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subsubsubobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subsubsubsubobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subsubsubsubobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subsubsubsubsubobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubsubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubsubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var subsubsubsubsubobserver: @escaping (Value) -> Void
    // The block that is called when the property is unsubscribed.
    private var unsubsubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is disposed.
    private var dissubsubsubsubsubobserver: @escaping () -> Void
    // The block that is called when the property is subscribed.
    private var sub

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] = [:]
    // The observers of the property.
    private var _observersCount: Int = 0
    
    // The initializer.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self._observers[self._observersCount] = observer
        self._observersCount += 1
        return self._observersCount - 1
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify the observers of the property.
    func notify(_ value: Value) {
        for observer in self._observers {
            observer(value)
        }
    }
}

class ObservableProperty<Value> {
    // The 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 initializer.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self._observers[self._observersCount] = observer
        self._observersCount += 1
        return self._observersCount - 1
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify the observers of the property.
    func notify(_ value: Value) {
        for observer in self._observers {
            observer(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] = [:]
    // The observers of the property.
    private var _observersCount: Int = 0
    
    // The initializer.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self._observers[self._observersCount] = observer
        self._observersCount += 1
        return self._observersCount - 1
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify the observers of the property.
    func notify(_ value: Value) {
        for observer in self._observers {
            observer(value)
        }
    }
}

// A property that is observable.
class ObservableProperty<Value> {
    // The 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 initializer.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self._observers[self._observersCount] = observer
        self._observersCount += 1
        return self._observersCount - 1
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify the observers of the property.
    func notify(_ value: Value) {
        for observer in self._observers {
            observer(value)
        }
    }
}

// A property that is observable.
class ObservableProperty<Value> {
    // The 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 initializer.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self._observers[self._observersCount] = observer
        self._observersCount += 1
        return self._observersCount - 1
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify the observers of the property.
    func notify(_ value: Value) {
        for observer in self._observers {
            observer(value)
        }
    }
}

// A property that is observable.
class ObservableProperty<Value> {
    // The 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 initializer.
    init(value: Value) {
        self.value = value
    }
    
    // Subscribe to the property.
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        self._observers[self._observersCount] = observer
        self._observersCount += 1
        return self._observersCount - 1
    }
    
    // Unsubscribe from the property.
    func unsubscribe(_ observer: UUID) {
        self._observers.remove(_: observer)
    }
    
    // Notify the observers of the property.
    func notify(_ value: Value) {
        for observer in self._observers {
            observer(value)
        }
    }
}

// A property that is observable.
class ObservableProperty<Value> {
    // The value of the property.
    

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 {
    @unavailable("Use the Clamped protocol to create instances.")
    init() {}
}

extension ClampedProtocol {
    @unavailable("Use the Clamped protocol to create instances.")
    init() {}
}

extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    var wrappedValue: Value {
        get {
            return self.wrappedValue
        }
        set(value) {
            self.wrappedValue = value
        }
    }
}

extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    var range: ClosedRange<Value> {
        get {
            return self.range
        }
        set(value) {
            self.range = value
        }
    }
}

extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    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
    }
}

extension Clamped {
    @unavailable("Use the Clamped protocol to create instances.")
    init() {}
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @unavailable("Use the Clamped protocol to create instances.")
    init() {}
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    var wrappedValue: Value {
        get {
            return self.wrappedValue
        }
        set(value) {
            self.wrappedValue = value
        }
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    var range: ClosedRange<Value> {
        get {
            return self.range
        }
        set(value) {
            self.range = value
        }
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension ClampedProtocol {
    @objc(protocol ClampedProtocol)
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped protocol implementation.
extension Cla

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>
    
    // Initialize the property with a value and a range.
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Get the wrapped value.
    @objc(getter:wrappedValue) Value get() {
        return self.wrappedValue
    }
    
    // Set the wrapped value within the specified range.
    @objc(setter:wrappedValue:) void set(value: Value) {
        self.wrappedValue = value
        self.wrappedValue = self.wrappedValue.clamped(at: self.range)
    }
}

extension ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return self.wrappedValue.clamped(at: at)
    }
}

struct ClampedInt: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Int(self.wrappedValue).clamped(at: at)
    }
}

struct ClampedDouble: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Double(self.wrappedValue).clamped(at: at)
    }
}

struct ClampedFloat: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Float(self.wrappedValue).clamped(at: at)
    }
}

struct ClampedString: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return String(self.wrappedValue).clamped(at: at)
    }
}

struct ClampedBool: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Bool(self.wrappedValue).clamped(at: at)
    }
}

struct ClampedAny: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Any(self.wrappedValue).clamped(at: at)
    }
}

```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>
    
    // Initialize the property with a value and a range.
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Get the wrapped value.
    @objc(getter:wrappedValue) Value get() {
        return self.wrappedValue
    }
    
    // Set the wrapped value within the specified range.
    @objc(setter:wrappedValue:) void set(value: Value) {
        self.wrappedValue = value
        self.wrappedValue = self.wrappedValue.clamped(at: self.range)
    }
}

// Extension for the Clamped protocol.
extension ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return self.wrappedValue.clamped(at: at)
    }
}

// Clamped protocol implementation for Int.
struct ClampedInt: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Int(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Double.
struct ClampedDouble: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Double(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Float.
struct ClampedFloat: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Float(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for String.
struct ClampedString: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return String(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Bool.
struct ClampedBool: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Bool(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Any.
struct ClampedAny: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Any(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Any.
struct ClampedAny: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Any(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Any.
struct ClampedAny: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Any(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Any.
struct ClampedAny: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Any(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Any.
struct ClampedAny: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Any(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Any.
struct ClampedAny: ClampedProtocol {
    // Clamps the wrapped value within the specified range.
    func clamped(at: ClosedRange<Value>) -> Value {
        return Any(self.wrappedValue).clamped(at: at)
    }
}

// Clamped protocol implementation for Any.
struct ClampedAny: ClampedProtocol {
    //

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<WrappedType: ClampedProtocol> {
    var wrappedValue: WrappedType.Value
    var range: ClosedRange<WrappedType.Value>
    init(wrappedValue: WrappedType.Value, _ range: ClosedRange<WrappedType.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

extension ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    @propertyWrapper
    struct Clamped<WrappedType: ClampedProtocol> {
        var wrappedValue: WrappedType.Value
        var range: ClosedRange<WrappedType.Value>
        init(wrappedValue: WrappedType.Value, _ range: ClosedRange<WrappedType.Value>) {
            self.wrappedValue = wrappedValue
            self.range = range
        }
    }
}

struct ClampedInt: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedDouble: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedFloat: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedString: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedBool: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedArray<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedSet<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedMap<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedTuple<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedOption<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedFuture<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(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<WrappedType: ClampedProtocol> {
    var wrappedValue: WrappedType.Value
    var range: ClosedRange<WrappedType.Value>
    init(wrappedValue: WrappedType.Value, _ range: ClosedRange<WrappedType.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

extension ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    @propertyWrapper
    struct Clamped<WrappedType: ClampedProtocol> {
        var wrappedValue: WrappedType.Value
        var range: ClosedRange<WrappedType.Value>
        init(wrappedValue: WrappedType.Value, _ range: ClosedRange<WrappedType.Value>) {
            self.wrappedValue = wrappedValue
            self.range = range
        }
    }
}

// ClampedInt is a Clamped protocol for Int.
struct ClampedInt: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedDouble is a Clamped protocol for Double.
struct ClampedDouble: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedFloat is a Clamped protocol for Float.
struct ClampedFloat: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedString is a Clamped protocol for String.
struct ClampedString: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedBool is a Clamped protocol for Bool.
struct ClampedBool: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedArray is a Clamped protocol for Array.
struct ClampedArray<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedSet is a Clamped protocol for Set.
struct ClampedSet<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedMap is a Clamped protocol for Map.
struct ClampedMap<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedTuple is a Clamped protocol for Tuple.
struct ClampedTuple<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedOption is a Clamped protocol for Option.
struct ClampedOption<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedFuture is a Clamped protocol for Future.
struct ClampedFuture<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super(wrappedValue: wrappedValue, range: range)
    }
}

// ClampedStream is a Clamped protocol for Stream.
struct ClampedStream<WrappedType>: ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<WrappedType: ClampedProtocol> {
    var wrappedValue: WrappedType.Value
    var range: ClosedRange<WrappedType.Value>
    init(wrappedValue: WrappedType.Value, range: ClosedRange<WrappedType.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // The wrapped value.
    var value: WrappedType.Value {
        get {
            return self.wrappedValue
        }
        set(value) {
            self.wrappedValue = value
        }
    }
    
    // The wrapped value clamped to the range.
    var clampedValue: WrappedType.Value {
        get {
            return self.wrappedValue.clamp(self.range)
        }
        set(value) {
            self.wrappedValue = 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<WrappedType: ClampedProtocol> {
    var wrappedValue: WrappedType.Value
    var range: ClosedRange<WrappedType.Value>
    init(wrappedValue: WrappedType.Value, range: ClosedRange<WrappedType.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // The wrapped value.
    var value: WrappedType.Value {
        get {
            return self.wrappedValue
        }
        set(value) {
            self.wrappedValue = value
        }
    }
    
    // The wrapped value clamped to the range.
    var clampedValue: WrappedType.Value {
        get {
            return self.wrappedValue.clamp(self.range)
        }
        set(value) {
            self.wrappedValue = value
        }
    }
}
```

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<WrappedType: ClampedProtocol> {
    var wrappedValue: WrappedType.Value
    var range: ClosedRange<WrappedType.Value>
    init(wrappedValue: WrappedType.Value, _ range: ClosedRange<WrappedType.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

extension ClampedProtocol {
    func clamp(toValue: Value) -> Value {
        return self.range.start.clamp(toValue).clamp(self.range.end)
    }
}

struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    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<WrappedType: ClampedProtocol> {
    var wrappedValue: WrappedType.Value
    var range: ClosedRange<WrappedType.Value>
    init(wrappedValue: WrappedType.Value, _ range: ClosedRange<WrappedType.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Extension methods for ClampedProtocol.
extension ClampedProtocol {
    func clamp(toValue: Value) -> Value {
        return self.range.start.clamp(toValue).clamp(self.range.end)
    }
}

// Example usage:
struct ClampedInt: ClampedProtocol {
    typealias Value = Int
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}
struct ClampedFloat: ClampedProtocol {
    typealias Value = Float
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        super.init(wrappedValue: wrappedValue, range: range)
    }
}

// Example usage:
let clampedInt = ClampedInt(wrappedValue: 5, range: 0..<10)
print(clampedInt.clamp(toValue: 15)) // prints 10
let clampedFloat = ClampedFloat(wrappedValue: 5.0, range: 0.0..<10.0)
print(clampedFloat.clamp(toValue: 15.0)) // prints 10.0
```

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
    }
    var value: Wrapped.Value {
        get {
            return self.wrappedValue.clamp(self.range)
        }
        set(value) {
            self.wrappedValue = 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 wrappedValue: Wrapped.Value
    var range: ClosedRange<Wrapped.Value>
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    var value: Wrapped.Value {
        get {
            return self.wrappedValue.clamp(self.range)
        }
        set(value) {
            self.wrappedValue = value
        }
    }
}
```

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(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> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> {
    Wrapped wrapped
    var range: ClosedRange<Wrapped.Value>
    
    init(wrappedValue: Wrapped.Value, _ range: ClosedRange<Wrapped.Value>) {
        self.wrapped = Clamped(wrappedValue, range)
        self.range = range
    }
}

// Property wrapper that clamps value within a specified range

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    var wrappedValue: Wrapped.Value
    var range: ClosedRange<Wrapped.Value>
    
    // Initializer
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Accessor methods
    var value: Wrapped.Value {
        return self.wrappedValue.value
    }
    
    // Setter method
    mutating func value(_ newValue: Wrapped.Value) {
        self.wrappedValue.wrappedValue = newValue
    }
}

extension Clamped<Wrapped: ClampedProtocol> {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
    var value: Wrapped.Value
    mutating func value(_ newValue: Wrapped.Value)
}

extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
    var value: Wrapped.Value
    mutating func value(_ newValue: Wrapped.Value)
}

extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    var value: Wrapped.Value
    mutating func value(_ newValue: Wrapped.Value)
}

extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
}

extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    var value: 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> where Wrapped.Value: Comparable {
    var wrappedValue: Wrapped.Value
    var range: ClosedRange<Wrapped.Value>
    
    // Initializer
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
    
    // Accessor methods
    var value: Wrapped.Value {
        return self.wrappedValue.value
    }
    
    // Setter method
    mutating func value(_ newValue: Wrapped.Value) {
        self.wrappedValue.wrappedValue = newValue
    }
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
    var value: Wrapped.Value
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
    var value: Wrapped.Value
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    var value: Wrapped.Value
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    var value: Wrapped.Value
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    var value: Wrapped.Value
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    init(wrappedValue: Wrapped.Value, range: ClosedRange<Wrapped.Value>)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    var value: Wrapped.Value
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    var value: Wrapped.Value
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: ClampedProtocol> where Wrapped.Value: Comparable {
    @required
    mutating func value(_ newValue: Wrapped.Value)
}

// Protocol conformance for Clamped<Wrapped>
extension Clamped<Wrapped: Clamped

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
    }
}

```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 ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable> {
    var wrappedValue: Value
    var range: ClosedRange<Value>
}

extension ClampedProtocol {
    // Initialize the Clamped object with a value and a range.
    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>
}

// Clamped protocol implementation.
extension ClampedProtocol {
    // Initialize the Clamped object with a value and a range.
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Clamped property getter.
@property Clamped<Value> {
    // Access the wrapped value and clamp it within the specified range.
    get {
        let clampedValue = Clamped(wrappedValue, range)
        return clampedValue
    }
}

// Clamped property setter.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range.
    set(clampedValue) {
        wrappedValue = clampedValue.wrappedValue
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using a custom clamp function.
    set(clampedValue, clamp: (Value) -> Value) {
        wrappedValue = clamp(clampedValue.wrappedValue)
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function and a default clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using a custom clamp function.
    set(clampedValue, clamp: (Value) -> Value, defaultClamp: (Value) -> Value) {
        wrappedValue = clamp(clampedValue.wrappedValue)
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function and a default clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using a custom clamp function.
    set(clampedValue, clamp: (Value) -> Value, defaultClamp: (Value) -> Value, range: ClosedRange<Value>) {
        wrappedValue = clamp(clampedValue.wrappedValue)
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function and a default clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using a custom clamp function.
    set(clampedValue, clamp: (Value) -> Value, defaultClamp: (Value) -> Value, range: ClosedRange<Value>, clampValue: Value) {
        wrappedValue = clamp(clampedValue.wrappedValue)
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function and a default clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using a custom clamp function.
    set(clampedValue, clamp: (Value) -> Value, defaultClamp: (Value) -> Value, range: ClosedRange<Value>, clampValue: Value, clampValue2: Value) {
        wrappedValue = clamp(clampedValue.wrappedValue)
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function and a default clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using a custom clamp function.
    set(clampedValue, clamp: (Value) -> Value, defaultClamp: (Value) -> Value, range: ClosedRange<Value>, clampValue: Value, clampValue2: Value, clampValue3: Value) {
        wrappedValue = clamp(clampedValue.wrappedValue)
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function and a default clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using a custom clamp function.
    set(clampedValue, clamp: (Value) -> Value, defaultClamp: (Value) -> Value, range: ClosedRange<Value>, clampValue: Value, clampValue2: Value, clampValue3: Value, clampValue4: Value) {
        wrappedValue = clamp(clampedValue.wrappedValue)
        range = clampedValue.range
    }
}

// Clamped property setter with a custom clamp function and a default clamp function.
@property Clamped<Value> {
    // Set the wrapped value and clamp it within the specified range using

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol> {
    var wrapped: Wrapped
    var logger: @escaping (Event, Wrapped.Value) -> Void
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrapped = Wrapped(wrappedValue)
        self.logger = logger
    }
}

extension LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrapped = Wrapped(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<Wrapped: LoggedProtocol> {
    var wrapped: Wrapped
    var logger: @escaping (Event, Wrapped.Value) -> Void
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrapped = Wrapped(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.wrapped = Wrapped(wrappedValue)
        self.logger = logger
    }
}
```

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(wrapped: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrapped
        self.logger = logger
    }
    
    // Get the wrapped value.
    var value: T.Value {
        logger(Event.get, self.wrapped.value)
        return self.wrapped.value
    }
    
    // Set the wrapped value.
    var value = value where T.Value: Any {
        logger(Event.set, self.wrapped.value)
        self.wrapped.value = value
    }
}

struct Example {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension Example: LoggedProtocol {
    var value: Int {
        logger(Event.get, self.value)
        return self.value
    }
    
    var value = value where Int: Any {
        logger(Event.set, self.value)
        self.value = 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(wrapped: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrapped
        self.logger = logger
    }
    
    // Get the wrapped value.
    var value: T.Value {
        logger(Event.get, self.wrapped.value)
        return self.wrapped.value
    }
    
    // Set the wrapped value.
    var value = value where T.Value: Any {
        logger(Event.set, self.wrapped.value)
        self.wrapped.value = value
    }
}

// Example usage
struct Example {
    var value: Int
    init(value: Int) {
        self.value = value
    }
}

extension Example: LoggedProtocol {
    var value: Int {
        logger(Event.get, self.value)
        return self.value
    }
    
    var value = value where Int: Any {
        logger(Event.set, self.value)
        self.value = value
    }
}

// Usage
let example = Example(42)
let loggedExample = Logged(example, logger: { event, value in
    print("Event: \(event), Value: \(value)")
})

loggedExample.value = 100
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol> {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.wrappedValue = 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
    }
    
    // Implement the LoggedProtocol protocol
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.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<Wrapped: LoggedProtocol> {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.wrappedValue = 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
    }
    
    // Implement the LoggedProtocol protocol
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.wrappedValue = 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
    }
    
    // Implement the LoggedProtocol protocol
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.wrappedValue = 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
    }
    
    // Implement the LoggedProtocol protocol
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.wrappedValue = 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
    }
    
    // Implement the LoggedProtocol protocol
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.wrappedValue = 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
    }
    
    // Implement the LoggedProtocol protocol
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set(value) {
            self.logger(Event.set, value)
            self.wrappedValue = 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
    }
    
    

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol> {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set {
            self.logger(Event.set, self.wrappedValue)
            self.wrappedValue = newValue
        }
    }
}

struct MyClass {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set {
            self.logger(Event.set, self.wrappedValue)
            self.wrappedValue = newValue
        }
    }
}

```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<Wrapped: LoggedProtocol> {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set {
            self.logger(Event.set, self.wrappedValue)
            self.wrappedValue = newValue
        }
    }
}

// Example usage
struct MyClass {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Int {
        get {
            self.logger(Event.get, self.wrappedValue)
            return self.wrappedValue
        }
        set {
            self.logger(Event.set, self.wrappedValue)
            self.wrappedValue = newValue
        }
    }
}

// Example usage
let myLogger = { event, value ->
    print("Event: \(event), Value: \(value)")
}

let wrapped = Logged(MyClass(wrappedValue: 42, logger: myLogger))
wrapped.wrappedValue = 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
    }
    func get() -> T.Value {
        let event = Event.get
        let value = self.wrappedValue
        self.logger(event, value)
        return value
    }
    mutating func set(_ value: T.Value) {
        let event = Event.set
        let oldValue = self.wrappedValue
        self.wrappedValue = value
        self.logger(event, oldValue)
    }
}

struct Example: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    @override var Value: Int { return self.get() }
    @override mutating func Value(_ value: Int) { self.set(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 wrappedValue: T.Value
    var logger: T.logger
    init(wrappedValue: T.Value, logger: T.logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    func get() -> T.Value {
        let event = Event.get
        let value = self.wrappedValue
        self.logger(event, value)
        return value
    }
    mutating func set(_ value: T.Value) {
        let event = Event.set
        let oldValue = self.wrappedValue
        self.wrappedValue = value
        self.logger(event, oldValue)
    }
}

// Example usage:
struct Example: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    @override var Value: Int { return self.get() }
    @override mutating func Value(_ value: Int) { self.set(value) }
}

// Usage:
let logger = { event, value ->
    print("Event: \(event), Value: \(value)")
}

let example = Example(wrappedValue: 42, logger: logger)
print("Wrapped Value: \(example.Value)")
example.Value = 99
print("Wrapped Value: \(example.Value)")
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

class LoggedClass<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

class LoggedClass2<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

class LoggedClass3<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

class LoggedClass4<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        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<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

// A simple class that logs access and modification of its properties.
class LoggedClass<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

// A simple class that logs access and modification of its properties.
class LoggedClass2<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

// A simple class that logs access and modification of its properties.
class LoggedClass3<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

// A simple class that logs access and modification of its properties.
class LoggedClass4<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return self.wrappedValue
    }
}

// A simple class that logs access and modification of its properties.
class LoggedClass5<Wrapped> where Wrapped: LoggedProtocol {
    var wrappedValue: Wrapped.Value
    var logger: @escaping (Event, Wrapped.Value) -> Void
    
    init(wrappedValue: Wrapped.Value, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrappedValue: Wrapped.Value {
        self.logger(Event.set, self.wrappedValue)
        return self.wrappedValue
    }
    
    var value: Wrapped.Value {
        self.logger(Event.get, self.wrappedValue)
        return 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
    }
    mutating func set(value: Value) {
        self.wrappedValue = value
        self.logger(set, value)
    }
    func get() -> Value {
        self.logger(get, self.wrappedValue)
        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 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
    }
    mutating func set(value: Value) {
        self.wrappedValue = value
        self.logger(set, value)
    }
    func get() -> Value {
        self.logger(get, self.wrappedValue)
        return self.wrappedValue
    }
}

// Example usage
let logger = { (event, value) in
    print(event, ":", value)
}

let wrappedString = Logged(wrappedValue: "Hello, World!", logger: logger)
wrappedString.set("Goodbye, World!")
let result = wrappedString.get()
print(result) // Prints "get: Hello, World! set: Goodbye, World!"
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol> {
    var wrapped: Wrapped
    var logger: @escaping (Event, Wrapped.Value) -> Void
    init(wrappedValue: Wrapped, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
}

extension Logged {
    // Accessor methods that log access to the wrapped property.
    var <Getter> get {
        logger(Event.get, wrapped.wrapped)
        return wrapped.wrapped
    }
    
    // Mutator method that logs modification of the wrapped property.
    var <Setter> set {
        logger(Event.set, wrapped.wrapped)
        wrapped.wrapped = newValue
    }
}

```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<Wrapped: LoggedProtocol> {
    var wrapped: Wrapped
    var logger: @escaping (Event, Wrapped.Value) -> Void
    init(wrappedValue: Wrapped, logger: @escaping (Event, Wrapped.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
}

extension Logged {
    // Accessor methods that log access to the wrapped property.
    var <Getter> get {
        logger(Event.get, wrapped.wrapped)
        return wrapped.wrapped
    }
    
    // Mutator method that logs modification of the wrapped property.
    var <Setter> set {
        logger(Event.set, wrapped.wrapped)
        wrapped.wrapped = newValue
    }
}

// Example usage:
let logger = { event, value ->
    print("Event: \(event), Value: \(value)")
}

let wrapped = Logged(Wrapped(42), logger)
wrapped.get // Logs: Event: get, Value: 42
wrapped.set = 100 // Logs: 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 wrapped: T
    var logger: @escaping (Event, T.Value) -> Void
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
}

extension LoggedProtocol {
    associatedtype Value
    
    mutating func log(event: Event, value: Value) {
        logger(event, value)
    }
}

struct Example: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    mutating func set(value: Int) {
        wrappedValue = value
        log(set, value)
    }
    
    mutating func get() -> Int {
        log(get, wrappedValue)
        return 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
    
    init(wrappedValue: T, logger: @escaping (Event, T.Value) -> Void) {
        self.wrapped = wrappedValue
        self.logger = logger
    }
}

// Extension method to log access and modification of the wrapped property.
extension LoggedProtocol {
    associatedtype Value
    
    mutating func log(event: Event, value: Value) {
        logger(event, value)
    }
}

// Example usage
struct Example: LoggedProtocol {
    var wrappedValue: Int
    var logger: @escaping (Event, Int) -> Void
    
    init(wrappedValue: Int, logger: @escaping (Event, Int) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    mutating func set(value: Int) {
        wrappedValue = value
        log(set, value)
    }
    
    mutating func get() -> Int {
        log(get, wrappedValue)
        return wrappedValue
    }
}

// Example usage
let example = Example(wrappedValue: 42, logger: { event, value in
    print("Event:", event, "Value:", value)
})

example.set(value: 100)
let result = example.get()
print("Result:", result)
```

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z, A> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z, A, B> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z, A, B, C> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        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<Wrapped: LoggedProtocol> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z, A> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z, A, B> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged<Wrapped: LoggedProtocol, T, U, V, W, X, Y, Z, A, B, C> {
    var wrappedValue: Wrapped.Value
    var logger: Wrapped.Logger
    init(wrappedValue: Wrapped.Value, logger: Wrapped.Logger) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
}

// Property wrapper that logs access and modification of the wrapped

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 city = "San Francisco"
                let forecast = self.provider.forecast(for: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(_):
                return nil
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        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:
                let city = "San Francisco"
                let forecast = self.provider.forecast(for: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(_):
                return nil
        }
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Sunny"
    }
}

// Weather application.
// Provide a user interface to search for a city and check its forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                let forecast = self.provider.forecast(for: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(_):
                return nil
        }
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Sunny"
    }
}

// Weather application.
// Provide a user interface to search for a city and check its forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                let forecast = self.provider.forecast(for: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(_):
                return nil
        }
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Sunny"
    }
}

// Weather application.
// Provide a user interface to search for a city and check its forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                let forecast = self.provider.forecast(for: city)
                return ApplicationFeedback.success(city: city, forecast: forecast)
            case UserAction.keyboardCharacterSelect(_):
                return nil
        }
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Sunny"
    }
}

// Weather application.
// Provide a user interface to search for a city and check its forecast.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                let forecast = self.provider.forecast(for: city)
                return Applicati<|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
    
    // WeatherApplicationDependencies
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    // WeatherApplicationInteractions
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(_):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.backspace()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = self.getSearchText()
        if city == nil {
            return nil
        }
        
        let forecast = try self.provider.forecast(for city: city)
        if let feedback = ApplicationFeedback.success(city: city, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: city)
        }
    }
    
    func backspace() -> ApplicationFeedback? {
        let city = self.getSearchText()
        if city == nil {
            return nil
        }
        
        let newCity = city.substring(0, city.length - 1)
        if newCity.isEmpty() {
            return nil
        }
        
        let forecast = try self.provider.forecast(for city: newCity)
        if let feedback = ApplicationFeedback.success(city: newCity, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: newCity)
        }
    }
    
    // WeatherApplicationInteractions
    func getSearchText() -> String? {
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        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
    
    // WeatherApplicationDependencies
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    // WeatherApplicationInteractions
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(_):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.backspace()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = self.getSearchText()
        if city == nil {
            return nil
        }
        
        let forecast = try self.provider.forecast(for city: city)
        if let feedback = ApplicationFeedback.success(city: city, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: city)
        }
    }
    
    func backspace() -> ApplicationFeedback? {
        let city = self.getSearchText()
        if city == nil {
            return nil
        }
        
        let newCity = city.substring(0, city.length - 1)
        if newCity.isEmpty() {
            return nil
        }
        
        let forecast = try self.provider.forecast(for city: newCity)
        if let feedback = ApplicationFeedback.success(city: newCity, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: newCity)
        }
    }
    
    // WeatherApplicationInteractions
    func getSearchText() -> String? {
        return nil
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        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
    
    // WeatherApplicationDependencies
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    // WeatherApplicationInteractions
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(_):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.backspace()
        }
    }
    
    func search() -> ApplicationFeedback? {
        let city = self.getSearchText()
        if city == nil {
            return nil
        }
        
        let forecast = try self.provider.forecast(for city: city)
        if let feedback = ApplicationFeedback.success(city: city, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: city)
        }
    }
    
    func backspace() -> ApplicationFeedback? {
        let city = self.getSearchText()
        if city == nil {
            return nil
        }
        
        let newCity = city.substring(0, city.length - 1)
        if newCity.isEmpty() {
            return nil
        }
        
        let forecast = try self.provider.forecast(for city: newCity)
        if let feedback = ApplicationFeedback.success(city: newCity, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: newCity)
        }
    }
    
    // WeatherApplicationInteractions
    func getSearchText() -> String? {
        return nil
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        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
    
    // WeatherApplicationDependencies
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    // WeatherApplicationInteractions
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.

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 city = self.searchForCity()
                if let forecast = self.provider.forecast(for: city) {
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } else {
                    return ApplicationFeedback.failure(city: city)
                }
            case UserAction.keyboardCharacterSelect(_):
                // Do nothing
            case UserAction.keyboardDeleteBackwards:
                // Do nothing
        }
    }
    
    func searchForCity() -> String {
        // Do something to search for a city
        return "San Francisco"
    }
}

class WeatherUndergroundProvider: WeatherProvider {
    var apiKey: String
    
    init(apiKey: String) {
        self.apiKey = apiKey
    }
    
    func forecast(for city: String) throws -> String {
        let url = URL(string: "http://api.wunderground.com/api/$apiKey/forecast/q/$city.json")
        let request = URLRequest(url: url)
        let response = URLSession.shared.dataTask(with: request) {
            let data = data
            let error = error
            if let data = data {
                let json = JSON(data: data)
                let weather = json.object(at: "forecast").object(at: "simpleforecast").array(at: "forecastday").object(at: 0).object(at: "conditions")
                return weather.string(at: "text")
            } else {
                return nil
            }
        }
        return respons<|fim_suffix|>
let weatherApplication = WeatherApplication(provider: WeatherUndergroundProvider(apiKey: "YOUR_API_KEY"))
let action = UserAction.searchButtonPress
let feedback = weatherApplication.handle(action: action)
if let success = feedback.succ<|fim_middle|>e
    }
}

```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 city = self.searchForCity()
                if let forecast = self.provider.forecast(for: city) {
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } else {
                    return ApplicationFeedback.failure(city: city)
                }
            case UserAction.keyboardCharacterSelect(_):
                // Do nothing
            case UserAction.keyboardDeleteBackwards:
                // Do nothing
        }
    }
    
    func searchForCity() -> String {
        // Do something to search for a city
        return "San Francisco"
    }
}

// Weather provider that uses the Weather Underground API.
class WeatherUndergroundProvider: WeatherProvider {
    var apiKey: String
    
    init(apiKey: String) {
        self.apiKey = apiKey
    }
    
    func forecast(for city: String) throws -> String {
        let url = URL(string: "http://api.wunderground.com/api/$apiKey/forecast/q/$city.json")
        let request = URLRequest(url: url)
        let response = URLSession.shared.dataTask(with: request) {
            let data = data
            let error = error
            if let data = data {
                let json = JSON(data: data)
                let weather = json.object(at: "forecast").object(at: "simpleforecast").array(at: "forecastday").object(at: 0).object(at: "conditions")
                return weather.string(at: "text")
            } else {
                return nil
            }
        }
        return respons<|fim_suffix|>
let weatherApplication = WeatherApplication(provider: WeatherUndergroundProvider(apiKey: "YOUR_API_KEY"))
let action = UserAction.searchButtonPress
let feedback = weatherApplication.handle(action: action)
if let success = feedback.succ<|fim_middle|>e
    }
}

// Weather application that uses the Weather Underground API.<|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 self.search()
            case UserAction.keyboardCharacterSelect(character: Character):
                return self.search(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteLastCharacter()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        return self.checkForecast(city: city)
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
    
    func deleteLastCharacter() -> ApplicationFeedback? {
        return nil
    }
    
    func checkForecast(city: String) -> ApplicationFeedback? {
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return ""
    }
}

```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: Character):
                return self.search(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteLastCharacter()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        return self.checkForecast(city: city)
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
    
    func deleteLastCharacter() -> ApplicationFeedback? {
        return nil
    }
    
    func checkForecast(city: String) -> ApplicationFeedback? {
        return nil
    }
}

// Weather provider.
// Check weather forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return ""
    }
}

// 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: Character):
                return self.search(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteLastCharacter()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        return self.checkForecast(city: city)
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
    
    func deleteLastCharacter() -> ApplicationFeedback? {
        return nil
    }
    
    func checkForecast(city: String) -> ApplicationFeedback? {
        return nil
    }
}

// Weather provider.
// Check weather forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return ""
    }
}

// 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: Character):
                return self.search(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteLastCharacter()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        return self.checkForecast(city: city)
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
    
    func deleteLastCharacter() -> ApplicationFeedback? {
        return nil
    }
    
    func checkForecast(city: String) -> ApplicationFeedback? {
        return nil
    }
}

// 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 User

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.handleSearch()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleCharacterSelect(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleDeleteBackwards()
        }
    }
    
    func handleSearch() -> ApplicationFeedback? {
        let city = self.searchForCity()
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func handleCharacterSelect(character: Character) -> ApplicationFeedback? {
        // Handle character selection
    }
    
    func handleDeleteBackwards() -> ApplicationFeedback? {
        // Handle backspace
    }
    
    func searchForCity() -> String? {
        // Search for city
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Fetch forecast from weather API
    }
}

```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.handleSearch()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleCharacterSelect(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleDeleteBackwards()
        }
    }
    
    func handleSearch() -> ApplicationFeedback? {
        let city = self.searchForCity()
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func handleCharacterSelect(character: Character) -> ApplicationFeedback? {
        // Handle character selection
    }
    
    func handleDeleteBackwards() -> ApplicationFeedback? {
        // Handle backspace
    }
    
    func searchForCity() -> String? {
        // Search for city
    }
}

// Weather provider.
// Provide weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Fetch forecast from weather API
    }
}

// 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.handleSearch()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleCharacterSelect(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleDeleteBackwards()
        }
    }
    
    func handleSearch() -> ApplicationFeedback? {
        let city = self.searchForCity()
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func handleCharacterSelect(character: Character) -> ApplicationFeedback? {
        // Handle character selection
    }
    
    func handleDeleteBackwards() -> ApplicationFeedback? {
        // Handle backspace
    }
    
    func searchForCity() -> String? {
        // Search for 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.handleSearch()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleCharacterSelect(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleDeleteBackwards()
        }
    }
    
    func handleSearch() -> ApplicationFeedback? {
        let city = self.searchForCity()
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func handleCharacterSelect(character: Character) -> ApplicationFeedback? {
        // Handle character selection
    }
    
    func handleDeleteBackwards() -> ApplicationFeedback? {
        // Handle backspace
    }
    
    func searchForCity() -> String? {
        // Search for 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.handleSearch()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleCharacterSelect(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleDelete

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(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.delete()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(for city: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func delete() -> ApplicationFeedback? {
        return nil
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Weather forecast for $city"
    }
}

```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(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.delete()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(for city: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func delete() -> ApplicationFeedback? {
        return nil
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
}

// Weather provider.
// Fetch weather forecast for a city.
protocol WeatherProvider {
    func forecast(for city: String) throws -> String
}

// Weather provider implementation.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Weather forecast for $city"
    }
}

// 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(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.delete()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(for city: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func delete() -> ApplicationFeedback? {
        return nil
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
}

// 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(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.delete()
        }
    }
    
    func search(character: Character? = nil) -> ApplicationFeedback? {
        let city = self.searchCity(character: character)
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(for city: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func delete() -> ApplicationFeedback? {
        return nil
    }
    
    func searchCity(character: Character? = nil) -> String? {
        return nil
    }
}

// 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(character: character)
            case UserAction.keyboardDeleteBackwards:
                return self.delete()
        }
    }

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()
        }
        return nil
    }
    
    func search() -> ApplicationFeedback? {
        let city = self.getSearchCity()
        if city == nil {
            return nil
        }
        let forecast = try self.provider.forecast(for: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func getSearchCity() -> String? {
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        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:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.search()
            case UserAction.keyboardDeleteBackwards:
                return self.search()
        }
        return nil
    }
    
    func search() -> ApplicationFeedback? {
        let city = self.getSearchCity()
        if city == nil {
            return nil
        }
        let forecast = try self.provider.forecast(for: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func getSearchCity() -> String? {
        return nil
    }
}

// Weather provider.
// Provide forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        return "Sunny"
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide forecast for a given city.
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
    
    // Initialize with a WeatherProvider.
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    // Handle user actions to fill search bar results and use WeatherProvider to check forecast.
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.fillSearchBar(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteLastCharacterFromSearchBar()
        }
    }
    
    // Search for a city and return the forecast.
    func search() -> ApplicationFeedback? {
        let city = self.getSearchBarText()
        if city == nil {
            return nil
        }
        
        let forecast = try self.provider.forecast(for: city)
        if let feedback = ApplicationFeedback.success(city: city, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: city)
        }
    }
    
    // Fill the search bar with a character.
    func fillSearchBar(character: Character) -> ApplicationFeedback? {
        let city = self.getSearchBarText()
        if city == nil {
            return nil
        }
        
        let newCity = city + character
        let forecast = try self.provider.forecast(for: newCity)
        if let feedback = ApplicationFeedback.success(city: newCity, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: newCity)
        }
    }
    
    // Delete the last character from the search bar.
    func deleteLastCharacterFromSearchBar() -> ApplicationFeedback? {
        let city = self.getSearchBarText()
        if city == nil {
            return nil
        }
        
        let newCity = city.substri<|fim_suffix|>
        if let feedback = ApplicationFeedback.success(city: newCity, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: newCity)
        }
    }
    
    // Get the text of the search bar.
    func getSearchBarText() -> String? {
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Simulate a weather forecast for a city.
        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
    
    // Initialize with a WeatherProvider.
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    // Handle user actions to fill search bar results and use WeatherProvider to check forecast.
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.fillSearchBar(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteLastCharacterFromSearchBar()
        }
    }
    
    // Search for a city and return the forecast.
    func search() -> ApplicationFeedback? {
        let city = self.getSearchBarText()
        if city == nil {
            return nil
        }
        
        let forecast = try self.provider.forecast(for: city)
        if let feedback = ApplicationFeedback.success(city: city, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: city)
        }
    }
    
    // Fill the search bar with a character.
    func fillSearchBar(character: Character) -> ApplicationFeedback? {
        let city = self.getSearchBarText()
        if city == nil {
            return nil
        }
        
        let newCity = city + character
        let forecast = try self.provider.forecast(for: newCity)
        if let feedback = ApplicationFeedback.success(city: newCity, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: newCity)
        }
    }
    
    // Delete the last character from the search bar.
    func deleteLastCharacterFromSearchBar() -> ApplicationFeedback? {
        let city = self.getSearchBarText()
        if city == nil {
            return nil
        }
        
        let newCity = city.substri<|fim_suffix|>
        if let feedback = ApplicationFeedback.success(city: newCity, forecast: forecast) {
            return feedback
        } else {
            return ApplicationFeedback.failure(city: newCity)
        }
    }
    
    // Get the text of the search bar.
    func getSearchBarText() -> String? {
        return nil
    }
}

// Weather provider.
// Check the weather forecast for a city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Simulate a weather forecast for a city.
        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
    
    // Initialize with a WeatherProvider.
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    // Handle user actions to fill search bar results and use WeatherProvider to check forecast.
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.search()
            case UserAction.keyboardCharacterSelect(Character):
                return self.fillSearchBar(Character)
            case UserAction.keyboardDeleteBackwards:
                return self.deleteLastCharacterFromSearchBar()
        }
    }
    
    // Search for a city and return the forecast.
    func search() -> ApplicationFeedback? {
        let city = self.getSearchBarText()
        if city == nil {
            return nil
        }
        
        let forecast = try self.provider.forecast(for: city)
        if let feedback = ApplicationFeedback.success(city: city, forecast: forecast) {
            return feedback
        } else {
            return Applicati<|fim_middle|>ng(0..<city.length - 1)<|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 self.handleSearchButtonPress()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleKeyboardCharacterSelect(action.Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleKeyboardDeleteBackwards()
        }
    }
    
    func handleSearchButtonPress() -> ApplicationFeedback? {
        let city = self.searchForCity()
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(for: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func handleKeyboardCharacterSelect(character: Character) -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
    
    func handleKeyboardDeleteBackwards() -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
    
    func searchForCity() -> String? {
        // TODO: Implement
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // TODO: Implement
        return ""
    }
}

class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

class WeatherApplicationInteractions: WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
}

```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.handleSearchButtonPress()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleKeyboardCharacterSelect(action.Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleKeyboardDeleteBackwards()
        }
    }
    
    func handleSearchButtonPress() -> ApplicationFeedback? {
        let city = self.searchForCity()
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(for: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func handleKeyboardCharacterSelect(character: Character) -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
    
    func handleKeyboardDeleteBackwards() -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
    
    func searchForCity() -> String? {
        // TODO: Implement
        return nil
    }
}

// Weather provider.
// Check weather forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // TODO: Implement
        return ""
    }
}

// Weather application provider.
// Provide WeatherProvider to WeatherApplication.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationInteractions to WeatherApplication.
class WeatherApplicationInteractions: WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol to WeatherApplication.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.handleSearchButtonPress()
            case UserAction.keyboardCharacterSelect(Character):
                return self.handleKeyboardCharacterSelect(action.Character)
            case UserAction.keyboardDeleteBackwards:
                return self.handleKeyboardDeleteBackwards()
        }
    }
    
    func handleSearchButtonPress() -> ApplicationFeedback? {
        let city = self.searchForCity()
        if city == nil {
            return nil
        }
        let forecast = self.provider.forecast(for: city)
        return ApplicationFeedback.success(city: city, forecast: forecast)
    }
    
    func handleKeyboardCharacterSelect(character: Character) -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
    
    func handleKeyboardDeleteBackwards() -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
    
    func searchForCity() -> String? {
        // TODO: Implement
        return nil
    }
}

// Weather application provider.
// Provide WeatherApplicationDependencies to WeatherApplication.
class WeatherApplicationProvider: WeatherApplicationDependencies {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application provider.
// Provide WeatherApplicationInteractions to WeatherApplication.
class WeatherApplicationInteractions: WeatherApplicationInteractions {
    func handle(action: UserAction) -> ApplicationFeedback? {
        // TODO: Implement
        return nil
    }
}

// Weather application provider.
// Provide WeatherApplicationProtocol to WeatherApplication.
class WeatherApplication: WeatherApplicationProtocol {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                return self.handleSearchButtonPress()
            case UserAction.keyboardCharacterSelect(Charac<|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:
                let city = "San Francisco"
                try {
                    let forecast = provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } catch {
                    return ApplicationFeedback.failure(city: city)
                }
            case UserAction.keyboardCharacterSelect(_):
            case UserAction.keyboardDeleteBackwards:
                // Do nothing
        }
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Simulate API call.
        return "Sunny"
    }
}

class WeatherApplicationProvider: WeatherApplicationDependencies, WeatherApplicationInteractions {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                try {
                    let forecast = provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } catch {
                    return ApplicationFeedback.failure(city: city)
                }
            case UserAction.keyboardCharacterSelect(_):
            case UserAction.keyboardDeleteBackwards:
                // Do nothing
        }
        return nil
    }
}

```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 city = "San Francisco"
                try {
                    let forecast = provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } catch {
                    return ApplicationFeedback.failure(city: city)
                }
            case UserAction.keyboardCharacterSelect(_):
            case UserAction.keyboardDeleteBackwards:
                // Do nothing
        }
        return nil
    }
}

// Weather provider.
// Provide forecast for a given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Simulate API call.
        return "Sunny"
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies, WeatherApplicationInteractions {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                try {
                    let forecast = provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } catch {
                    return ApplicationFeedback.failure(city: city)
                }
            case UserAction.keyboardCharacterSelect(_):
            case UserAction.keyboardDeleteBackwards:
                // Do nothing
        }
        return nil
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies, WeatherApplicationInteractions {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                try {
                    let forecast = provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forecast: forecast)
                } catch {
                    return ApplicationFeedback.failure(city: city)
                }
            case UserAction.keyboardCharacterSelect(_):
            case UserAction.keyboardDeleteBackwards:
                // Do nothing
        }
        return nil
    }
}

// Weather application provider.
// Provide forecast for a given city.
class WeatherApplicationProvider: WeatherApplicationDependencies, WeatherApplicationInteractions {
    var provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
            case UserAction.searchButtonPress:
                let city = "San Francisco"
                try {
                    let forecast = provider.forecast(for: city)
                    return ApplicationFeedback.success(city: city, forec<|fim_middle|>'<|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 {
    var balance: Double = 0.0
    var depositActor: Actor<Double>
    var withdrawActor: Actor<Double>

    init(balance: Double) {
        self.balance = balance
        self.depositActor = Actor(self.deposit)
        self.withdrawActor = Actor(self.withdraw)
    }

    func deposit(amount: Double) async {
        self.balance += amount
    }

    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        }
        return false
    }
}

class BankAccountClient {
    var bankAccount: BankAccountProtocol
    var depositFuture: Future<Void>
    var withdrawFuture: Future<Bool>

    init(bankAccount: BankAccountProtocol) {
        self.bankAccount = bankAccount
    }

    func deposit(amount: Double) {
        self.depositFuture = bankAccount.deposit(amount)
    }

    func withdraw(amount: Double) {
        self.withdrawFuture = bankAccount.withdraw(amount)
    }

    func waitForDeposit() {
        depositFuture.wait()
    }

    func waitForWithdraw(success: Bool) {
        withdrawFuture.wait()
        if !success {
            print("Withdrawal failed.")
        }
    }
}

```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 depositActor: Actor<Double>
    var withdrawActor: Actor<Double>

    init(balance: Double) {
        self.balance = balance
        self.depositActor = Actor(self.deposit)
        self.withdrawActor = Actor(self.withdraw)
    }

    func deposit(amount: Double) async {
        self.balance += amount
    }

    func withdraw(amount: Double) async -> Bool {
        if self.balance >= amount {
            self.balance -= amount
            return true
        }
        return false
    }
}

// Client code to interact with the bank account.
class BankAccountClient {
    var bankAccount: BankAccountProtocol
    var depositFuture: Future<Void>
    var withdrawFuture: Future<Bool>

    init(bankAccount: BankAccountProtocol) {
        self.bankAccount = bankAccount
    }

    func deposit(amount: Double) {
        self.depositFuture = bankAccount.deposit(amount)
    }

    func withdraw(amount: Double) {
        self.withdrawFuture = bankAccount.withdraw(amount)
    }

    func waitForDeposit() {
        depositFuture.wait()
    }

    func waitForWithdraw(success: Bool) {
        withdrawFuture.wait()
        if !success {
            print("Withdrawal failed.")
        }
    }
}

// Example usage:
let bankAccount = BankAccount(balance: 1000.0)
let client = BankAccountClient(bankAccount: bankAccount)

client.deposit(amount: 500.0)
client.waitForDeposit()

client.withdraw(amount: 200.0)
client.waitForWithdraw(success: true)

client.withdraw(amount: 1500.0)
client.waitForWithdraw(success: false)
```

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 _depositQueue: Queue<Double> = Queue<Double>()
    private var _withdrawQueue: Queue<Double> = Queue<Double>()
    private var _lock: Lock = Lock()
    private var _actor: Actor<BankAccountProtocol> = Actor(this)

    // Initializer
    init(balance: Double) {
        _balance = balance
    }

    // Getter for the balance property
    override var balance: Double {
        _lock.withLock {
            return _balance
        }
    }

    // Deposit method that allows asynchronous deposits
    override func deposit(amount: Double) async {
        _lock.withLock {
            _depositQueue.enqueue(amount)
        }
    }

    // Withdraw method that allows asynchronous withdrawals
    override func withdraw(amount: Double) async -> Bool {
        _lock.withLock {
            if _balance >= amount {
                _balance -= amount
                return true
            } else {
                _withdrawQueue.enqueue(amount)
                return false
            }
        }
    }

    // Method to perform the actual transactions
    private func performTransaction(amount: Double, isDeposit: Bool) async -> Bool {
        if isDeposit {
            _lock.withLock {
                _balance += amount
            }
            return true
        } else {
            let canWithdraw = _lock.withLock {
                if _balance >= amount {
                    _balance -= amount
                    true
                } else {
                    false
                }
            }
            if !canWithdraw {
                _lock.withLock {
                    _withdrawQueue.enqueue(amount)
                }
                return false
            } else {
                return true
            }
        }
    }

    // Method to process deposits from the deposit queue
    private func processDeposits() async {
        while let amount = _depositQueue.dequeue() {
            if !performTransaction(amount, isDeposit: true) {
                _lock.withLock {
                    _balance += amount
                }
            }
        }
    }

    // Method to process withdrawals from the withdraw queue
    private func processWithdrawals() async {
        while let amount = _withdrawQueue.dequeue() {
            if !performTransaction(amount, isDeposit: false) {
                _lock.withLock {
                    _balance -= amount
                }
            }
        }
    }

    // Method to start the actor
    func start() {
        _actor.start()
        _actor.spawn(processDeposits)
        _actor.spawn(processWithdrawals)
    }

    // Method to stop the actor
    func stop() {
        _actor.stop()
    }
}

```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 _depositQueue: Queue<Double> = Queue<Double>()
    private var _withdrawQueue: Queue<Double> = Queue<Double>()
    private var _lock: Lock = Lock()
    private var _actor: Actor<BankAccountProtocol> = Actor(this)

    // Initializer
    init(balance: Double) {
        _balance = balance
    }

    // Getter for the balance property
    override var balance: Double {
        _lock.withLock {
            return _balance
        }
    }

    // Deposit method that allows asynchronous deposits
    override func deposit(amount: Double) async {
        _lock.withLock {
            _depositQueue.enqueue(amount)
        }
    }

    // Withdraw method that allows asynchronous withdrawals
    override func withdraw(amount: Double) async -> Bool {
        _lock.withLock {
            if _balance >= amount {
                _balance -= amount
                return true
            } else {
                _withdrawQueue.enqueue(amount)
                return false
            }
        }
    }

    // Method to perform the actual transactions
    private func performTransaction(amount: Double, isDeposit: Bool) async -> Bool {
        if isDeposit {
            _lock.withLock {
                _balance += amount
            }
            return true
        } else {
            let canWithdraw = _lock.withLock {
                if _balance >= amount {
                    _balance -= amount
                    true
                } else {
                    false
                }
            }
            if !canWithdraw {
                _lock.withLock {
                    _withdrawQueue.enqueue(amount)
                }
                return false
            } else {
                return true
            }
        }
    }

    // Method to process deposits from the deposit queue
    private func processDeposits() async {
        while let amount = _depositQueue.dequeue() {
            if !performTransaction(amount, isDeposit: true) {
                _lock.withLock {
                    _balance += amount
                }
            }
        }
    }

    // Method to process withdrawals from the withdraw queue
    private func processWithdrawals() async {
        while let amount = _withdrawQueue.dequeue() {
            if !performTransaction(amount, isDeposit: false) {
                _lock.withLock {
                    _balance -= amount
                }
            }
        }
    }

    // Method to start the actor
    func start() {
        _actor.start()
        _actor.spawn(processDeposits)
        _actor.spawn(processWithdrawals)
    }

    // Method to stop the actor
    func stop() {
        _actor.stop()
    }
}

// Example usage
let account: BankAccountProtocol = BankAccount(balance: 1000.0)
account.start()
account.deposit(500.0)
account.withdraw(200.0)
print(account.balance) // Output: 1200.0
account.stop()```

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
        }
        return false
    }
}

class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0
    
    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
        }
        return false
    }
}

// Bank account class that uses a thread-safe actor to manage asynchronous deposits and withdrawals.
class BankAccount: BankAccountProtocol {
    var balance: Double = 0.0

protocol BankAccountProtocol {
    init(balance: Double)
    var balance: Double { get async }
    func deposit(amount: Double) async
    func withdraw(amount: Double) async -> Bool
}

actor BankAccount: BankAccountProtocol {
    // Actor state
    var _balance: Double
    var _depositQueue: Queue<Double>
    var _withdrawQueue: Queue<Double>
    var _lock: Lock

    // Constructor
    init(balance: Double) {
        _balance = balance
        _depositQueue = Queue<Double>()
        _withdrawQueue = Queue<Double>()
        _lock = Lock()
    }

    // Balance getter
    func balance() async -> Double {
        return _balance
    }

    // Deposit method
    func deposit(amount: Double) async {
        _depositQueue.enqueue(amount)
    }

    // Withdraw method
    func withdraw(amount: Double) async -> Bool {
        if _balance >= amount {
            _withdrawQueue.enqueue(amount)
            return true
        } else {
            return false
        }
    }
}

class BankAccount: BankAccountProtocol {
    // Actor state
    var _balance: Double
    var _depositQueue: Queue<Double>
    var _withdrawQueue: Queue<Double>
    var _lock: Lock

    // Constructor
    init(balance: Double) {
        _balance = balance
        _depositQueue = Queue<Double>()
        _withdrawQueue = Queue<Double>()
        _lock = Lock()
    }

    // Balance getter
    func balance() async -> Double {
        return _balance
    }

    // Deposit method
    func deposit(amount: Double) async {
        _lock.withLock {
            _balance += amount
        }
    }

    // Withdraw method
    func withdraw(amount: Double) async -> Bool {
        _lock.withLock {
            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 {
    // Actor state
    var _balance: Double
    var _depositQueue: Queue<Double>
    var _withdrawQueue: Queue<Double>
    var _lock: Lock

    // Constructor
    init(balance: Double) {
        _balance = balance
        _depositQueue = Queue<Double>()
        _withdrawQueue = Queue<Double>()
        _lock = Lock()
    }

    // Balance getter
    func balance() async -> Double {
        return _balance
    }

    // Deposit method
    func deposit(amount: Double) async {
        _depositQueue.enqueue(amount)
    }

    // Withdraw method
    func withdraw(amount: Double) async -> Bool {
        if _balance >= amount {
            _withdrawQueue.enqueue(amount)
            return true
        } else {
            return false
        }
    }
}

// Thread-safe bank account class using a lock to ensure that the account balance remains consistent and transactions are atomic.
class BankAccount: BankAccountProtocol {
    // Actor state
    var _balance: Double
    var _depositQueue: Queue<Double>
    var _withdrawQueue: Queue<Double>
    var _lock: Lock

    // Constructor
    init(balance: Double) {
        _balance = balance
        _depositQueue = Queue<Double>()
        _withdrawQueue = Queue<Double>()
        _lock = Lock()
    }

    // Balance getter
    func balance() async -> Double {
        return _balance
    }

    // Deposit method
    func deposit(amount: Double) async {
        _lock.withLock {
            _balance += amount
        }
    }

    // Withdraw method
    func withdraw(amount: Double) async -> Bool {
        _lock.withLock {
            if _balance >= amount {
                _balance -= amount
                return true
            } else {
                return false
            }
        }
    }
}

// Bank account class using a lock to ensure that the account balance remains consistent and transactions are atomic.
class BankAccount: BankAccountProtocol {
    // Actor state
    var _balance: Double
    var _depositQueue: Queue<Double>
    var _withdrawQueue: Queue<Double>
    var _lock: Lock

    // Constructor
    init(balance: Double) {
        _balance = balance
        _depositQueue = Queue<Double>()
        _withdrawQueue = Queue<Double>()
        _lock = Lock()
    }

    // Balance getter
    func balance() async -> Double {
        return _balance
    }

    // Deposit method
    func deposit(amount: Double) async {
        _lock.withLock {
            _balance += amount
        }
    }

    // Withdraw method
    func withdraw(amount: Double) async -> Bool {
        _lock.withLock {
            if _balance >= amount {
                _balance -= amount
                return true
            } else {
                return false
            }
        }
    }
}

// Bank account class using a lock to ensure that the account balance remains consistent and transactions are atomic.
class BankAccount: BankAccountProtocol {
    // Actor state
    var _balance: Double
    var _depositQueue: Queue<Double>
    var _withdrawQueue: Queue<Double>
    var _lock: Lock

    // Constructor
    init(balance: Double) {
        _balance = balance
        _depositQueue = Queue<Double>()
        _withdrawQueue = Queue<Double>()
        _lock = Lock()
    }

    // Balance getter
    func balance() async -> Double {
        return _balance
    }

    // Deposit method
    func deposit(amount: Double) async {
        _lock.withLock {
            _balance += amount
        }
    }

    // Withdraw method
    func withdraw(amount: Double) async -> Bool {
        _lock.withLock {
            if _balance >= amount {
                _balance -= amount
                return true
            } else {
                return false
            }
        }
    }
}

// Bank account class using a lock to ensure that the account balance remains consistent and transactions are atomic.
class BankAccount: BankAccountProtocol {
    // Actor state
    var _balance: Double
    var _depositQueue: Queue<Double>
    var _withdrawQueue: Queue<Double>
    var _lock: Lock

    // Constructor
    init(balance: Double) {
        _balance = balance
        _depositQueue = Queue