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Key Value
engine mlx
prompt completion
temp 0.2
top_p 0.95
max_new_tokens 1024
n_completions 10

Solutions

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    var result: Any?
    var error: Error?

    do {
        result = try JSONSerialization.jsonObject(with: data, options: [])
    } catch {
        error = ParsingError.internalError(error)
    }

    guard let json = result as? JSON else {
        throw error ?? ParsingError.internalError(ParsingError.invalidInput)
    }

    return json
}

func serialize(json: JSON) throws -> String {
    guard let data = try? JSONSerialization.data(withJSONObject: json, options: []) else {
        throw ParsingError.internalError(ParsingError.invalidInput)
    }

    return String(data: data, encoding: .utf8) ?? ""
}

func parse(data: Data) throws -> JSON {
    var result: Any?
    var error: Error?

    do {
        result = try JSONSerialization.jsonObject(with: data, options: [])
    } catch {
        error = ParsingError.internalError(error)
    }

    guard let json = result as? JSON else {
        throw error ?? ParsingError.internalError(ParsingError.invalidInput)
    }

    return json
}

func serialize(json: JSON) throws -> Data {
    guard let data = try? JSONSerialization.data(withJSONObject: json, options: []) else {
        throw ParsingError.internalError(ParsingError.invalidInput)
    }

    return data
}
```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 {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    var result: Any?
    var error: Error?

    do {
        result = try JSONSerialization.jsonObject(with: data, options: [])
    } catch {
        error = ParsingError.internalError(error)
    }

    guard let json = result as? JSON else {
        throw error ?? ParsingError.internalError(ParsingError.invalidInput)
    }

    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> String {
    guard let data = try? JSONSerialization.data(withJSONObject: json, options: []) else {
        throw ParsingError.internalError(ParsingError.invalidInput)
    }

    return String(data: data, encoding: .utf8) ?? ""
}

// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
    var result: Any?
    var error: Error?

    do {
        result = try JSONSerialization.jsonObject(with: data, options: [])
    } catch {
        error = ParsingError.internalError(error)
    }

    guard let json = result as? JSON else {
        throw error ?? ParsingError.internalError(ParsingError.invalidInput)
    }

    return json
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON) throws -> Data {
    guard let data = try? JSONSerialization.data(withJSONObject: json, options: []) else {
        throw ParsingError.internalError(ParsingError.invalidInput)
    }

    return data
}
<|file_separator|>
error = ParsingError.internalError(error) // cannot assign to value: 'error' is immutable
error = ParsingError.internalError(error) // cannot assign to value: 'error' is immutable

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let result = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = result as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

func serialize(dictionary: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: dictionary, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

func parse(data: Data) throws -> JSON {
    do {
        let result = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = result as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

func serialize(data: Data) throws -> String {
    do {
        let result = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = result as? JSON else {
            throw ParsingError.invalidInput
        }
        return try serialize(dictionary: dictionary)
    } catch {
        throw ParsingError.internalError(error)
    }
}

func parse(string: String, encoding: String.Encoding) throws -> JSON {
    guard let data = string.data(using: encoding) else {
        throw ParsingError.invalidInput
    }
    return try parse(data: data)
}

func serialize(dictionary: JSON, encoding: String.Encoding) throws -> String {
    return try serialize(data: try serialize(dictionary: dictionary))
}

func parse(data: Data, encoding: String.Encoding) throws -> JSON {
    return try parse(data: data, encoding: encoding)
}

func serialize(data: Data, encoding: String.Encoding) throws -> String {
    return try serialize(data: data, encoding: encoding)
}
```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 {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let result = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = result as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON serializer, returns custom error type in case of failures.
func serialize(dictionary: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: dictionary, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let result = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = result as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON serializer, returns custom error type in case of failures.
func serialize(data: Data) throws -> String {
    do {
        let result = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = result as? JSON else {
            throw ParsingError.invalidInput
        }
        return try serialize(dictionary: dictionary)
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(string: String, encoding: String.Encoding) throws -> JSON {
    guard let data = string.data(using: encoding) else {
        throw ParsingError.invalidInput
    }
    return try parse(data: data)
}

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

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

// JSON serializer, returns custom error type in case of failures.
func serialize(data: Data, encoding: String.Encoding) throws -> String {
    return try serialize(data: data, encoding: encoding)
}
<|file_separator|>
return try serialize(data: try serialize(dictionary: dictionary)) // cannot convert value of type 'String' to expected argument type 'Data'

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 {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }
    
    var result: JSON = [:]
    
    var startIndex = data.startIndex
    var endIndex = data.endIndex
    
    // Skip leading whitespace
    while startIndex < endIndex && Character(UnicodeScalar(9)!) == data[startIndex] {
        startIndex = data.index(after: startIndex)
    }
    
    // Check if the string starts with a left curly brace
    guard startIndex < endIndex && data[startIndex] == Character(UnicodeScalar(123)!) else {
        throw ParsingError.invalidInput
    }
    
    // Skip the left curly brace
    startIndex = data.index(after: startIndex)
    
    // Parse the JSON object
    while startIndex < endIndex {
        // Check if the current character is a right curly brace
        if data[startIndex] == Character(UnicodeScalar(125)!) {
            // Skip the right curly brace
            startIndex = data.index(after: startIndex)
            break
        }
        
        // Check if the current character is a comma
        if data[startIndex] == Character(UnicodeScalar(44)!) {
            // Skip the comma
            startIndex = data.index(after: startIndex)
            continue
        }
        
        // Check if the current character is a colon
        if data[startIndex] == Character(UnicodeScalar(58)!) {
            // Skip the colon
            startIndex = data.index(after: startIndex)
            continue
        }
        
        // Check if the current character is a left curly brace
        if data[startIndex] == Character(UnicodeScalar(123)!) {
            // Parse the key
            let key = parseKey(data: data, startIndex: startIndex)
            
            // Check if the key is a string
            guard let keyString = key as? String else {
                throw ParsingError.invalidInput
            }
            
            // Skip the colon
            startIndex = data.index(after: startIndex)
            
            // Check if the current character is a colon
            if data[startIndex] != Character(UnicodeScalar(58)!) {
                throw ParsingError.invalidInput
            }
            
            // Skip the colon
            startIndex = data.index(after: startIndex)
            
            // Parse the value
            let value = try parseValue(data: data, startIndex: startIndex)
            
            // Check if the value is a string
            guard let valueString = value as? String else {
                throw ParsingError.invalidInput
            }
            
            // Check if the value is a number
            if let valueNumber = value as? Double {
                // Check if the value is a negative number
                if valueNumber < 0 {
                    // Convert the negative number to a string
                    let valueString = String(valueNumber)
                    
                    // Check if the value is a negative number
                    if valueString.hasPrefix("-") {
                        // Convert the negative number to a negative string
                        result[keyString] = valueString
                    } else {
                        // Convert the negative number to a positive string
                        result[keyString] = "-" + valueString
                    }
                } else {
                    // Convert the negative number to a positive string
                    result[keyString] = valueString
                }
            } else {
                // Check if the value is a boolean
                if let valueBool = value as? Bool {
                    // Convert the boolean to a string
                    result[keyString] = valueBool.description
                } else {
                    // Convert the value to a string
                    result[keyString] = valueString
                }
            }
            
            // Skip the right curly brace
            startIndex = data.index(after: startIndex)
            
            // Check if the current character is a comma
            if data[startIndex] == Character(UnicodeScalar(44)!) {
                // Skip the comma
                startIndex = data.index(after: startIndex)
            }
        } else {
            // Check if the current character is a right curly brace
            if data[startIndex] == Character(UnicodeScalar(125)!) {
                // Skip the right curly brace
                startIndex = data.index(after: startIndex)
                break
            }
            
            // Check if the current character is a comma
            if data[startIndex] == Character(UnicodeScalar(44)!) {
                // Skip the comma
                startIndex = data.index(
let result = try parse(string: string) // cannot find 'parse' in scope
_ = try parse(string: string) // cannot find 'parse' in scope

typealias JSON = [String: Any]

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

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

func serialize(json: JSON) throws -> String {
    // ...
}

func parse(data: Data) throws -> JSON {
    // ...
}

func serialize(json: JSON) throws -> Data {
    // ...
}

func parse(url: URL) throws -> JSON {
    // ...
}

func serialize(json: JSON) throws -> URL {
    // ...
}

func parse(url: URL, options: JSONSerialization.ReadingOptions) throws -> JSON {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions) throws -> Data {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions) throws -> URL {
    // ...
}

func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int) throws -> JSON {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int) throws -> Data {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int) throws -> URL {
    // ...
}

func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int, encoding: String.Encoding) throws -> JSON {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding) throws -> Data {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding) throws -> URL {
    // ...
}

func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> JSON {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> Data {
    // ...
}

func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> URL {
    // ...
}
```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 {
    // ...
}

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

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

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

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

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

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions) throws -> JSON {
    // ...
}

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

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions) throws -> JSON {
    // ...
}

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

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int) throws -> JSON {
    // ...
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int) throws -> Data {
    // ...
}

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int) throws -> JSON {
    // ...
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int) throws -> URL {
    // ...
}

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int, encoding: String.Encoding) throws -> JSON {
    // ...
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding) throws -> Data {
    // ...
}

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int, encoding: String.Encoding) throws -> JSON {
    // ...
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding) throws -> URL {
    // ...
}

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> JSON {
    // ...
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> Data {
    // ...
}

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> JSON {
    // ...
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON, options: JSONSerialization.WritingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> URL {
    // ...
}

// JSON parser, returns custom error type in case of failures.
func parse(url: URL, options: JSONSerialization.ReadingOptions, maxLength: Int, encoding: String.Encoding, userInfo: [CodingUserInfoKey: Any]?) throws -> JSON {
    // ...
}

// JSON serializer, returns custom error type in case of failures.
func serialize(json: JSON
} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')
} // missing return in global function expected to return 'String'
} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')
} // missing return in global function expected to return 'Data'
} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')
} // missing return in global function expected to return 'URL'
} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')
} // missing return in global function expected to return 'Data'
} // missing return in global function expected to return 'URL'
} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')
} // missing return in global function expected to return 'Data'
} // missing return in global function expected to return 'URL'
} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')
} // missing return in global function expected to return 'Data'
} // missing return in global function expected to return 'URL'
} // missing return in global function expected to return 'JSON' (aka 'Dictionary<String, Any>')
} // missing return in global function expected to return 'Data'
} // missing return in global function expected to return 'URL'

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    // Check if the string is a valid JSON.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    // Try to parse the JSON.
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } 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 {
    // Check if the string is a valid JSON.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    // Try to parse the JSON.
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } catch {
        throw ParsingError.internalError(error)
    }
}

// Example usage:
do {
    let json = try parse(string: "{\"key\": \"value\"}")
    print(json)
} catch {
    print("Error parsing JSON:", error)
}
<|file_separator|>

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    // Check if the input is a valid JSON string.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    // Try to parse the JSON string into a dictionary.
    do {
        if let dictionary = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
            return dictionary
        } else {
            throw ParsingError.invalidInput
        }
    } 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 {
    // Check if the input is a valid JSON string.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    // Try to parse the JSON string into a dictionary.
    do {
        if let dictionary = try JSONSerialization.jsonObject(with: data, options: []) as? JSON {
            return dictionary
        } else {
            throw ParsingError.invalidInput
        }
    } catch {
        throw ParsingError.internalError(error)
    }
}

// Example usage:
do {
    let json = """
    {
        "name": "John",
        "age": 30,
        "address": {
            "street": "123 Main St",
            "city": "Anytown"
        }
    }
    """
    let parsedJSON = try parse(string: json)
    print(parsedJSON)
} catch {
    print("Error parsing JSON: \(error)")
}
<|file_separator|>

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    // 1. Check if the string is valid JSON.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }
    
    // 2. Try to parse the JSON.
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        
        // 3. Check if the JSON is valid.
        guard let dictionary = json as? [String: Any] else {
            throw ParsingError.invalidInput
        }
        
        // 4. Return the parsed JSON.
        return 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 {
    // 1. Check if the string is valid JSON.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }
    
    // 2. Try to parse the JSON.
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        
        // 3. Check if the JSON is valid.
        guard let dictionary = json as? [String: Any] else {
            throw ParsingError.invalidInput
        }
        
        // 4. Return the parsed JSON.
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

// Example usage:
let jsonString = """
{
    "name": "John",
    "age": 30,
    "address": {
        "street": "123 Main St",
        "city": "Anytown",
        "state": "CA",
        "zip": "12345"
    }
}
"""
do {
    let json = try parse(string: jsonString)
    print(json)
} catch {
    print("Error parsing JSON: \(error)")
}
<|file_separator|>

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    let data = string.data(using: .utf8)!
    let json = try JSONSerialization.jsonObject(with: data, options: [])
    guard let dictionary = json as? [String: Any] else {
        throw ParsingError.invalidInput
    }
    return dictionary
}

func encode(dictionary: JSON) throws -> String {
    let data = try JSONSerialization.data(withJSONObject: dictionary, options: [])
    guard let string = String(data: data, encoding: .utf8) else {
        throw ParsingError.internalError(NSError())
    }
    return string
}
```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 data = string.data(using: .utf8)!
    let json = try JSONSerialization.jsonObject(with: data, options: [])
    guard let dictionary = json as? [String: Any] else {
        throw ParsingError.invalidInput
    }
    return dictionary
}

// JSON encoder, returns custom error type in case of failures.
func encode(dictionary: JSON) throws -> String {
    let data = try JSONSerialization.data(withJSONObject: dictionary, options: [])
    guard let string = String(data: data, encoding: .utf8) else {
        throw ParsingError.internalError(NSError())
    }
    return string
}
<|file_separator|>
 // XCTAssertTrue failed

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    // Check if the string is a valid JSON.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    // Try to parse the JSON.
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } 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 {
    // Check if the string is a valid JSON.
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    // Try to parse the JSON.
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON
        return json ?? [:]
    } catch {
        throw ParsingError.internalError(error)
    }
}

// Example usage:
do {
    let json = try parse(string: "{\"key\": \"value\"}")
    print(json)
} catch {
    print("Error parsing JSON:", error)
}
<|file_separator|>

typealias JSON = [String: Any]

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

func parse(string: String) throws -> JSON {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

func serialize(dictionary: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: dictionary, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

func serialize(data: Data) throws -> String {
    do {
        let string = String(data: data, encoding: .utf8)
        guard let dictionary = string else {
            throw ParsingError.invalidInput
        }
        return 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 {
    guard let data = string.data(using: .utf8) else {
        throw ParsingError.invalidInput
    }

    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON serializer, returns custom error type in case of failures.
func serialize(dictionary: JSON) throws -> String {
    do {
        let data = try JSONSerialization.data(withJSONObject: dictionary, options: [])
        guard let string = String(data: data, encoding: .utf8) else {
            throw ParsingError.invalidInput
        }
        return string
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON parser, returns custom error type in case of failures.
func parse(data: Data) throws -> JSON {
    do {
        let json = try JSONSerialization.jsonObject(with: data, options: [])
        guard let dictionary = json as? JSON else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}

// JSON serializer, returns custom error type in case of failures.
func serialize(data: Data) throws -> String {
    do {
        let string = String(data: data, encoding: .utf8)
        guard let dictionary = string else {
            throw ParsingError.invalidInput
        }
        return dictionary
    } catch {
        throw ParsingError.internalError(error)
    }
}
<|file_separator|>

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

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

// Example usage:
let html = generate(
    .element("html", children: [
        .element("head", children: [
            .element("title", children: [
                .text("Title")
            ])
        ]),
        .element("body", children: [
            .element("h1", children: [
                .text("Header")
            ]),
            .element("p", children: [
                .text("Paragraph")
            ]),
            .element("a", attributes: ["href": "https://swifteval.com"], children: [
                .text("Link")
            ])
        ])
    ])
)

print(html)
<|file_separator|>

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

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) in
            return key + "=\"" + value + "\""
        }.joined(separator: " ") + ">" + children.map { generate($0) }.joined(separator: "") + "</" + name + ">"
    }
}
```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 {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) in
            return key + "=\"" + value + "\""
        }.joined(separator: " ") + ">" + children.map { generate($0) }.joined(separator: "") + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) in
            return key + "=\"" + value + "\""
        }.joined(separator: " ") + ">" + children.map { generate($0) }.joined(separator: "") + "</" + name + ">"
    }
}
<|file_separator|>
Start: a ["href": "swifteval"] // XCTAssertEqual failed: (Start: div [:]

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

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

// Example usage:
let tree = HTMLNode.element("div", children: [
    HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
        HTMLNode.text("Hello, world!")
    ])
])

print(generate(tree))
<|file_separator|>

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

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

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

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

// Example of usage
let html = HTMLNode.element("html", children: [
    HTMLNode.element("head", children: [
        HTMLNode.element("title", children: [
            HTMLNode.text("Title")
        ])
    ]),
    HTMLNode.element("body", children: [
        HTMLNode.element("h1", children: [
            HTMLNode.text("Header")
        ]),
        HTMLNode.element("p", children: [
            HTMLNode.text("Paragraph")
        ]),
        HTMLNode.element("a", attributes: ["href": "swifteval"], children: [
            HTMLNode.text("Link")
        ])
    ])
])

print(generate(html))
<|file_separator|>

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

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

// Example usage:
let html = generate(
    .element("div", children: [
        .element("a", attributes: ["href": "swifteval"], children: [
            .text("Hello, world!")
        ])
    ])
)

print(html)
<|file_separator|>

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

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}
```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 {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .

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

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

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

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}
```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 {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .

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

func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}
```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 {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .element(let name, let attributes, let children):
        return "<" + name + attributes.map { (key, value) -> String in
            return " " + key + "=\"" + value + "\""
        }.joined() + ">" + children.map { generate($0) }.joined() + "</" + name + ">"
    }
}

// HTML generator from predefined elements tree.
// Output with standart HTML like this "<div><a href="swifteval"></a></div>"
func generate(_ tree: HTMLNode) -> String {
    switch tree {
    case .text(let content):
        return content
    case .

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    // Remove all whitespaces
    let input = string.replacingOccurrences(of: " ", with: "")
    // Check if input is valid
    guard isValid(input) else {
        throw CalculateError.invalidInput
    }
    // Split input into tokens
    let tokens = input.components(separatedBy: CharacterSet.decimalDigits.inverted)
    // Check if input is valid
    guard tokens.count == 1 else {
        throw CalculateError.invalidInput
    }
    // Get the only token
    let token = tokens[0]
    // Check if token is a number
    guard let number = Double(token) else {
        throw CalculateError.invalidInput
    }
    // Return the only token
    return number
}
```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 {
    // Remove all whitespaces
    let input = string.replacingOccurrences(of: " ", with: "")
    // Check if input is valid
    guard isValid(input) else {
        throw CalculateError.invalidInput
    }
    // Split input into tokens
    let tokens = input.components(separatedBy: CharacterSet.decimalDigits.inverted)
    // Check if input is valid
    guard tokens.count == 1 else {
        throw CalculateError.invalidInput
    }
    // Get the only token
    let token = tokens[0]
    // Check if token is a number
    guard let number = Double(token) else {
        throw CalculateError.invalidInput
    }
    // Return the only token
    return number
}

// Check if input is valid
func isValid(_ string: String) -> Bool {
    // Check if string is empty
    guard !string.isEmpty else {
        return false
    }
    // Check if string is a number
    guard let _ = Double(string) else {
        return false
    }
    // Check if string is a valid operation
    guard isValidOperation(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
    // Check if string is a valid expression
    guard isValidExpression(string) else {
        return false
    }
guard isValid(input) else { // cannot find 'isValid' in scope

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 {
    // Remove all spaces
    var input = string.replacingOccurrences(of: " ", with: "")
    // Check if input is valid
    guard isValidInput(input) else {
        throw CalculateError.invalidInput
    }
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all parentheses
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with: "")
    input = input.replacingOccurrences(of: ")", with: "")
    // Remove all brackets
    input = input.replacingOccurrences(of: "(", with:
XCTAssertEqual(try calculate("2+2"), 4.0) // cannot find 'calculate' in scope
XCTAssertEqual(try calculate("2+2*2"), 6.0) // cannot find 'calculate' in scope
XCTAssertEqual(try calculate("(2+2)*2"), 8.0) // cannot find 'calculate' in scope
XCTAssertThrowsError(try calculate("A/B")) // cannot find 'calculate' in scope

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack = [Double]()
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else {
            let b = stack.pop()!
            let a = stack.pop()!
            switch token {
            case "+":
                stack.append(a + b)
            case "-":
                stack.append(a - b)
            case "*":
                stack.append(a * b)
            case "/":
                stack.append(a / b)
            default:
                throw CalculateError.invalidInput
            }
        }
    }
    return stack.pop()!
}
```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    let tokens = string.split(separator: " ")
    var stack = [Double]()
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else {
            let b = stack.pop()!
            let a = stack.pop()!
            switch token {
            case "+":
                stack.append(a + b)
            case "-":
                stack.append(a - b)
            case "*":
                stack.append(a * b)
            case "/":
                stack.append(a / b)
            default:
                throw CalculateError.invalidInput
            }
        }
    }
    return stack.pop()!
}

// Example usage:
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Error: \(error)")
}
<|file_separator|>
let b = stack.pop()! // value of type '[Double]' has no member 'pop'
let a = stack.pop()! // value of type '[Double]' has no member 'pop'
stack.append(a + b) // cannot convert value of type 'String' to expected argument type 'Double'
stack.append(a - b) // cannot convert value of type 'Duration' to expected argument type 'Double'
stack.append(a * b) // cannot convert value of type 'Duration' to expected argument type 'Double'
stack.append(a / b) // cannot convert value of type 'Duration' to expected argument type 'Double'
return stack.pop()! // value of type '[Double]' has no member 'pop'

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    guard let tokens = string.split(separator: " ") else {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else if let operation = Operation(rawValue: token) {
            if stack.count < 2 {
                throw CalculateError.invalidInput
            }
            
            let b = stack.removeLast()
            let a = stack.removeLast()
            
            switch operation {
            case .add:
                stack.append(a + b)
            case .subtract:
                stack.append(a - b)
            case .multiply:
                stack.append(a * b)
            case .divide:
                stack.append(a / b)
            }
        } else {
            throw CalculateError.invalidInput
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

enum Operation: String {
    case add = "+"
    case subtract = "-"
    case multiply = "*"
    case divide = "/"
}
```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 {
    guard let tokens = string.split(separator: " ") else {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else if let operation = Operation(rawValue: token) {
            if stack.count < 2 {
                throw CalculateError.invalidInput
            }
            
            let b = stack.removeLast()
            let a = stack.removeLast()
            
            switch operation {
            case .add:
                stack.append(a + b)
            case .subtract:
                stack.append(a - b)
            case .multiply:
                stack.append(a * b)
            case .divide:
                stack.append(a / b)
            }
        } else {
            throw CalculateError.invalidInput
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

enum Operation: String {
    case add = "+"
    case subtract = "-"
    case multiply = "*"
    case divide = "/"
}

// Example usage
do {
    let result = try calculate("2+2*2")
    print(result)
} catch CalculateError.invalidInput {
    print("Invalid input")
}
<|file_separator|>
guard let tokens = string.split(separator: " ") else { // initializer for conditional binding must have Optional type, not '[String.SubSequence]' (aka 'Array<Substring>')
} else if let operation = Operation(rawValue: token) { // cannot convert value of type 'String.SubSequence' (aka 'Substring') to expected argument type 'String'

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    // Check if the string is valid
    guard let tokens = string.split(separator: " ") else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    guard tokens.count == 3 else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    guard tokens[1] == "+" || tokens[1] == "-" || tokens[1] == "*" || tokens[1] == "/" else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    guard let first = Double(tokens[0]), let second = Double(tokens[2]) else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    switch tokens[1] {
    case "+":
        return first + second
    case "-":
        return first - second
    case "*":
        return first * second
    case "/":
        return first / second
    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 {
    // Check if the string is valid
    guard let tokens = string.split(separator: " ") else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    guard tokens.count == 3 else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    guard tokens[1] == "+" || tokens[1] == "-" || tokens[1] == "*" || tokens[1] == "/" else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    guard let first = Double(tokens[0]), let second = Double(tokens[2]) else {
        throw CalculateError.invalidInput
    }
    
    // Check if the string is valid
    switch tokens[1] {
    case "+":
        return first + second
    case "-":
        return first - second
    case "*":
        return first * second
    case "/":
        return first / second
    default:
        throw CalculateError.invalidInput
    }
}

// Example usage
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Error: \(error)")
}
<|file_separator|>
guard let tokens = string.split(separator: " ") else { // initializer for conditional binding must have Optional type, not '[String.SubSequence]' (aka 'Array<Substring>')

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    let tokens = string.components(separatedBy: " ")
    var stack = [Double]()
    for token in tokens {
        if let value = Double(token) {
            stack.append(value)
        } else if let operation = Operation(rawValue: token) {
            let right = stack.removeLast()
            let left = stack.removeLast()
            switch operation {
            case .add:
                stack.append(left + right)
            case .subtract:
                stack.append(left - right)
            case .multiply:
                stack.append(left * right)
            case .divide:
                if right == 0 {
                    throw CalculateError.invalidInput
                }
                stack.append(left / right)
            }
        } else {
            throw CalculateError.invalidInput
        }
    }
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    return stack.first!
}

enum Operation: String {
    case add = "+"
    case subtract = "-"
    case multiply = "*"
    case divide = "/"
}
```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 {
    let tokens = string.components(separatedBy: " ")
    var stack = [Double]()
    for token in tokens {
        if let value = Double(token) {
            stack.append(value)
        } else if let operation = Operation(rawValue: token) {
            let right = stack.removeLast()
            let left = stack.removeLast()
            switch operation {
            case .add:
                stack.append(left + right)
            case .subtract:
                stack.append(left - right)
            case .multiply:
                stack.append(left * right)
            case .divide:
                if right == 0 {
                    throw CalculateError.invalidInput
                }
                stack.append(left / right)
            }
        } else {
            throw CalculateError.invalidInput
        }
    }
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    return stack.first!
}

enum Operation: String {
    case add = "+"
    case subtract = "-"
    case multiply = "*"
    case divide = "/"
}

// Example usage:
do {
    let result = try calculate("2+2*2")
    print(result)
} catch CalculateError.invalidInput {
    print("Invalid input")
} catch {
    print("Unknown error")
}
<|file_separator|>
 // Fatal error: Error raised at top level: Solution.CalculateError.invalidInput

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = string.split(separator: " ")
    if tokens.count == 0 {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    for token in tokens {
        if let value = Double(token) {
            stack.append(value)
        } else if token == "+" || token == "-" || token == "*" || token == "/" {
            if stack.count < 2 {
                throw CalculateError.invalidInput
            }
            let right = stack.removeLast()
            let left = stack.removeLast()
            switch token {
            case "+":
                stack.append(left + right)
            case "-":
                stack.append(left - right)
            case "*":
                stack.append(left * right)
            case "/":
                stack.append(left / right)
            default:
                throw CalculateError.invalidInput
            }
        } else {
            throw CalculateError.invalidInput
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}
```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens = string.split(separator: " ")
    if tokens.count == 0 {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    for token in tokens {
        if let value = Double(token) {
            stack.append(value)
        } else if token == "+" || token == "-" || token == "*" || token == "/" {
            if stack.count < 2 {
                throw CalculateError.invalidInput
            }
            let right = stack.removeLast()
            let left = stack.removeLast()
            switch token {
            case "+":
                stack.append(left + right)
            case "-":
                stack.append(left - right)
            case "*":
                stack.append(left * right)
            case "/":
                stack.append(left / right)
            default:
                throw CalculateError.invalidInput
            }
        } else {
            throw CalculateError.invalidInput
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

// Example usage:
do {
    let result = try calculate("2+2*2")
    print(result)
} catch CalculateError.invalidInput {
    print("Invalid input")
} catch {
    print("Unknown error")
}
<|file_separator|>
var tokens = string.split(separator: " ") // variable 'tokens' was never mutated; consider changing to 'let' constant
 // Fatal error: Error raised at top level: Solution.CalculateError.invalidInput

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack = [Double]()
    var tokens = string.components(separatedBy: " ")
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else if let operation = Operation(rawValue: token) {
            if stack.count < 2 {
                throw CalculateError.invalidInput
            }
            
            let right = stack.removeLast()
            let left = stack.removeLast()
            
            switch operation {
            case .add:
                stack.append(left + right)
            case .subtract:
                stack.append(left - right)
            case .multiply:
                stack.append(left * right)
            case .divide:
                stack.append(left / right)
            }
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

enum Operation: String {
    case add = "+"
    case subtract = "-"
    case multiply = "*"
    case divide = "/"
}
```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.components(separatedBy: " ")
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else if let operation = Operation(rawValue: token) {
            if stack.count < 2 {
                throw CalculateError.invalidInput
            }
            
            let right = stack.removeLast()
            let left = stack.removeLast()
            
            switch operation {
            case .add:
                stack.append(left + right)
            case .subtract:
                stack.append(left - right)
            case .multiply:
                stack.append(left * right)
            case .divide:
                stack.append(left / right)
            }
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

enum Operation: String {
    case add = "+"
    case subtract = "-"
    case multiply = "*"
    case divide = "/"
}
<|file_separator|>
var tokens = string.components(separatedBy: " ") // variable 'tokens' was never mutated; consider changing to 'let' constant
 // Fatal error: Error raised at top level: Solution.CalculateError.invalidInput

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var stack = [Double]()
    var tokens = string.split(separator: " ")
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else {
            if token == "+" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left + right)
            } else if token == "-" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left - right)
            } else if token == "*" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left * right)
            } else if token == "/" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left / right)
            } else if token == "(" {
                // Do nothing
            } else if token == ")" {
                // Do nothing
            } else {
                throw CalculateError.invalidInput
            }
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.removeLast()
}
```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.split(separator: " ")
    
    for token in tokens {
        if let number = Double(token) {
            stack.append(number)
        } else {
            if token == "+" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left + right)
            } else if token == "-" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left - right)
            } else if token == "*" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left * right)
            } else if token == "/" {
                let right = stack.removeLast()
                let left = stack.removeLast()
                stack.append(left / right)
            } else if token == "(" {
                // Do nothing
            } else if token == ")" {
                // Do nothing
            } else {
                throw CalculateError.invalidInput
            }
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.removeLast()
}

// Example usage
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Error: \(error)")
}
<|file_separator|>
var tokens = string.split(separator: " ") // variable 'tokens' was never mutated; consider changing to 'let' constant
 // Fatal error: Error raised at top level: Solution.CalculateError.invalidInput

enum CalculateError: Error {
    case invalidInput
}

func calculate(_ string: String) throws -> Double {
    var tokens = string.split(separator: " ")
    if tokens.count == 0 {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    for token in tokens {
        if let value = Double(token) {
            stack.append(value)
        } else {
            let right = stack.removeLast()
            let left = stack.removeLast()
            
            switch token {
            case "+":
                stack.append(left + right)
            case "-":
                stack.append(left - right)
            case "*":
                stack.append(left * right)
            case "/":
                stack.append(left / right)
            default:
                throw CalculateError.invalidInput
            }
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}
```swift
enum CalculateError: Error {
    case invalidInput
}

// Calculator which supports operations from readable string format.
// Valid tokens is "+-*/()", example input is "2+2*2".
func calculate(_ string: String) throws -> Double {
    var tokens = string.split(separator: " ")
    if tokens.count == 0 {
        throw CalculateError.invalidInput
    }
    
    var stack = [Double]()
    for token in tokens {
        if let value = Double(token) {
            stack.append(value)
        } else {
            let right = stack.removeLast()
            let left = stack.removeLast()
            
            switch token {
            case "+":
                stack.append(left + right)
            case "-":
                stack.append(left - right)
            case "*":
                stack.append(left * right)
            case "/":
                stack.append(left / right)
            default:
                throw CalculateError.invalidInput
            }
        }
    }
    
    if stack.count != 1 {
        throw CalculateError.invalidInput
    }
    
    return stack.first!
}

// Example usage:
do {
    let result = try calculate("2+2*2")
    print(result)
} catch {
    print("Error: \(error)")
}
<|file_separator|>
var tokens = string.split(separator: " ") // variable 'tokens' was never mutated; consider changing to 'let' constant
 // Fatal error: Can't remove last element from an empty collection

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, inputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, inputFile: String, outputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, inputFile: String, outputFile: String, errorFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.standardOutput.fileHandleForReading.readDataToEndOfFile()
    task.standardError.fileHandleForReading.readDataToEndOfFile()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// 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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// 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, inputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// 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, inputFile: String, outputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// 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, inputFile: String, outputFile: String, errorFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.standardOutput.fileHandleForReading.readDataToEndOfFile()
    task.standardError.fileHandleForReading.readDataToEndOfFile()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// 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, inputFile: String, outputFile: String, errorFile: String, outputFile2: String, errorFile2: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.closeFile() // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.closeFile() // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: String.Encoding.utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.closeFile() // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardOutput.fileHandleForReading.readDataToEndOfFile() // value of type 'Any?' has no member 'fileHandleForReading'
task.standardError.fileHandleForReading.readDataToEndOfFile() // value of type 'Any?' has no member 'fileHandleForReading'

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, output: String, error: String, stdin: String, stdout: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// 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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// 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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// 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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// 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, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// 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, stdin: String, stdout: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// Function to execute binary
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], options: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], options: [String: String], environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    for (key, value) in environment {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], options: [String: String], environment: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    for (key, value) in environment {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], options: [String: String], environment: [String: String], timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    for (key, value) in environment {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = Pipe(fileHandle: FileHandle(forReadingAtPath: "/dev/null"))
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], options: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], options: [String: String], environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    for (key, value) in environment {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], options: [String: String], environment: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    for (key, value) in environment {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], options: [String: String], environment: [String: String], timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[key] = value
    }
    for (key, value) in environment {
        task.environment[key] = value
    }
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = Pipe(fileHandle: FileHandle(forReadingAtPath: "/dev/null"))
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], options: [String: String], environment: [String: String], timeout: Int, stdin: String, stdout: String, stderr: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    for (key, value) in options {
        task.environment[
task.environment[key] = value // value of optional type '[String : String]?' must be unwrapped to refer to member 'subscript' of wrapped base type '[String : String]'
task.environment[key] = value // value of optional type '[String : String]?' must be unwrapped to refer to member 'subscript' of wrapped base type '[String : String]'
task.environment[key] = value // value of optional type '[String : String]?' must be unwrapped to refer to member 'subscript' of wrapped base type '[String : String]'
task.environment[key] = value // value of optional type '[String : String]?' must be unwrapped to refer to member 'subscript' of wrapped base type '[String : String]'
task.environment[key] = value // value of optional type '[String : String]?' must be unwrapped to refer to member 'subscript' of wrapped base type '[String : String]'
task.environment[key] = value // value of optional type '[String : String]?' must be unwrapped to refer to member 'subscript' of wrapped base type '[String : String]'
task.environment[key] = value // value of optional type '[String : String]?' must be unwrapped to refer to member 'subscript' of wrapped base type '[String : String]'
task.standardInput = Pipe(fileHandle: FileHandle(forReadingAtPath: "/dev/null")) // argument passed to call that takes no arguments

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null"))
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String], input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null"))
    task.standardOutput = Pipe(fileHandle: FileHandle.init(forWritingAtPath: output))
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], environment: [String: String], input: String, output: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null"))
    task.standardOutput = Pipe(fileHandle: FileHandle.init(forWritingAtPath: output))
    task.standardError = Pipe(fileHandle: FileHandle.init(forWritingAtPath: error))
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// 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, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// 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], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null"))
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// 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], input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null"))
    task.standardOutput = Pipe(fileHandle: FileHandle.init(forWritingAtPath: output))
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// 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], input: String, output: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null"))
    task.standardOutput = Pipe(fileHandle: FileHandle.init(forWritingAtPath: output))
    task.standardError = Pipe(fileHandle: FileHandle.init(forWritingAtPath: error))
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// 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], input: String, output: String, error: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = environment
    let pipe = Pipe()
    task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null"))
    task.standardOutput = Pipe(fileHandle: FileHandle.init(forWritingAtPath: output))
    task.standardError = Pipe(
task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null")) // argument passed to call that takes no arguments
task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null")) // argument passed to call that takes no arguments
task.standardOutput = Pipe(fileHandle: FileHandle.init(forWritingAtPath: output)) // argument passed to call that takes no arguments
task.standardInput = Pipe(fileHandle: FileHandle.init(forReadingAtPath: "/dev/null")) // argument passed to call that takes no arguments
task.standardOutput = Pipe(fileHandle: FileHandle.init(forWritingAtPath: output)) // argument passed to call that takes no arguments
task.standardError = Pipe(fileHandle: FileHandle.init(forWritingAtPath: error)) // argument passed to call that takes no arguments

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String], cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String], cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String], cwd: String, env: [String: String]) -> (String, String) {
    let task = Process()
    task.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String]) -> (String, String) { // invalid redeclaration of 'env'
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String], cwd: String) -> (String, String) { // invalid redeclaration of 'cwd'
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env: [String: String], cwd: String) -> (String, String) { // invalid redeclaration of 'env'

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, inputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardInput.fileHandleForReading.closeFile()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], input: String, inputFile: String, outputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardInput.fileHandleForReading.closeFile()
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.standardOutput.fileHandleForReading.closeFile()
    task.standardError.fileHandleForReading.closeFile()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// 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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// 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, inputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardInput.fileHandleForReading.closeFile()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// 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, inputFile: String, outputFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardInput.fileHandleForReading.closeFile()
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.standardOutput.fileHandleForReading.closeFile()
    task.standardError.fileHandleForReading.closeFile()
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// 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, inputFile: String, outputFile: String, errorFile: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardInput = Pipe()
    task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!)
    task.standardInput.fileHandleForWriting.closeFile()
    task.standardInput.fileHandleForReading.closeFile()
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.standardOutput.fileHandleForReading.closeFile()
    task.standardError.fileHandleForReading.closeFile()
    task.standardOutput.fileHandleForWriting.write(outputFile.data(using: .utf8)!)
    task.standardError.fileHandleForWriting.write(errorFile.data(using: .utf8)!)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.closeFile() // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForReading.closeFile() // value of type 'Any?' has no member 'fileHandleForReading'
task.standardInput.fileHandleForWriting.write(input.data(using: .utf8)!) // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForWriting.closeFile() // value of type 'Any?' has no member 'fileHandleForWriting'
task.standardInput.fileHandleForReading.closeFile() // value of type 'Any?' has no member 'fileHandleForReading'
task.standardOutput.fileHandleForReading.closeFile() // value of type 'Any?' has no member 'fileHandleForReading'
task.standardError.fileHandleForReading.closeFile() // value of type 'Any?' has no member 'fileHandleForReading'

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardInput = pipe
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    pipe.fileHandleForWriting.write(input.data(using: .utf8)!)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardInput = pipe
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    pipe.fileHandleForWriting.write(input.data(using: .utf8)!)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], input: String, output: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardInput = pipe
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    pipe.fileHandleForWriting.write(input.data(using: .utf8)!)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], input: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardInput = pipe
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    pipe.fileHandleForWriting.write(input.data(using: .utf8)!)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], input: String, output: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardInput = pipe
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    pipe.fileHandleForWriting.write(input.data(using: .utf8)!)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], input: String, output: String, error: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardInput = pipe
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    pipe.fileHandleForWriting.write(input.data(using: .utf8)!)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], input: String, output: String, error: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardInput = pipe
    task.standardOutput = Pipe()
    task.standardError = Pipe()
    task.launch()
    pipe.fileHandleForWriting.write(input.data(using: .utf8)!)
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return
 // XCTAssertTrue failed

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env2: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env2
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env2: [String: String], env3: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env2
    task.environment = env3
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env2: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env2
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env2: [String: String], env3: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    task.environment = env2
    task.environment = env3
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8)!
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, cwd: String, env2
 // XCTAssertTrue failed

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, stdin: String, stdout: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, stdin: String, stdout: String, stderr: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, stdin: String, stdout: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout: Int, stdin: String, stdout: String, stderr: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.standardInput = stdin.data(using: String.Encoding.utf8)
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: String.Encoding.utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], timeout
 // XCTAssertTrue failed

func execute(binary: String, arguments: [String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], cwd: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], cwd: String, timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

func execute(binary: String, arguments: [String], env: [String: String], cwd: String, timeout: Int, stdin: String, stdout: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}
```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 task = Process()
    task.launchPath = binary
    task.arguments = arguments
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String]) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], cwd: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], cwd: String, timeout: Int) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], cwd: String, timeout: Int, stdin: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], cwd: String, timeout: Int, stdin: String, stdout: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
    task.arguments = arguments
    task.environment = env
    task.currentDirectoryPath = cwd
    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe
    task.launch()
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8) ?? ""
    return (output, "")
}

// Function to execute binary with arguments.
// Returns tuple where first element is stdout and second is stderr.
func execute(binary: String, arguments: [String], env: [String: String], cwd: String, timeout: Int, stdin: String, stdout: String, stderr: String) -> (String, String) {
    let task = Process()
    task.launchPath = binary
 // XCTAssertTrue failed

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Example usage:
let fibonacci = memoize { n in
    if n <= 1 {
        return n
    } else {
        return fibonacci(n - 1) + fibonacci(n - 2)
    }
}

// Call the memoized function
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
print(fibonacci(10)) // Output: 55
<|file_separator|>

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Example usage:
let memoizedFibonacci = memoize { n in
    if n <= 1 {
        return n
    } else {
        return memoizedFibonacci(n - 1) + memoizedFibonacci(n - 2)
    }
}

// Call memoizedFibonacci with different inputs to see the cache effect.
memoizedFibonacci(10) // 55
memoizedFibonacci(15) // 610
memoizedFibonacci(20) // 6765
<|file_separator|>

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache: [T: U] = [:]
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Example usage:
let memoizedFibonacci = memoize { n in
    if n <= 1 {
        return n
    } else {
        return memoizedFibonacci(n - 1) + memoizedFibonacci(n - 2)
    }
}

// Call memoizedFibonacci to get the 10th Fibonacci number
let fibonacci10 = memoizedFibonacci(10)
print(fibonacci10) // Output: 55
<|file_separator|>

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Memoization function that caches the results of expensive computations.
func

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
<|file_separator|>

func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}
```swift
// Memoization function that caches the results of expensive computations.
func memoize<T: Hashable, U>(_ function: @escaping (T) -> U) -> (T) -> U {
    var cache = [T: U]()
    return {
        if let result = cache[$0] {
            return result
        } else {
            let result = function($0)
            cache[$0] = result
            return result
        }
    }
}

// Example usage:
let memoizedFibonacci = memoize { (n: Int) -> Int in
    if n <= 1 {
        return n
    }
    return memoizedFibonacci(n - 1) + memoizedFibonacci(n - 2)
}

// Call memoizedFibonacci to compute the 10th Fibonacci number.
memoizedFibonacci(10) // Output: 55
<|file_separator|>

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return 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 result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return result!
}
<|file_separator|>
error = error // cannot assign to value: 'error' is immutable

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempts = attempts
    var result: Result<T, Error>
    repeat {
        do {
            result = .success(try task())
        } catch {
            if attempts == 1 {
                result = .failure(error)
            } else {
                attempts -= 1
            }
        }
    } while case .failure(let error) = result
    return try result.get()
}
```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 attempts = attempts
    var result: Result<T, Error>
    repeat {
        do {
            result = .success(try task())
        } catch {
            if attempts == 1 {
                result = .failure(error)
            } else {
                attempts -= 1
            }
        }
    } while case .failure(let error) = result
    return try result.get()
}
<|file_separator|>
} while case .failure(let error) = result // 'case' label can only appear inside a 'switch' statement
} while case .failure(let error) = result // expected expression in 'repeat-while' condition

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return 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 result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return result!
}
<|file_separator|>
error = error // cannot assign to value: 'error' is immutable

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return 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 result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return result!
}
<|file_separator|>
error = error // cannot assign to value: 'error' is immutable

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: Result<T, Error>
    for _ in 0..<attempts {
        do {
            result = .success(try task())
            break
        } catch {
            result = .failure(error)
        }
    }
    return try result.get()
}
```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 result: Result<T, Error>
    for _ in 0..<attempts {
        do {
            result = .success(try task())
            break
        } catch {
            result = .failure(error)
        }
    }
    return try result.get()
}
<|file_separator|>
return try result.get() // variable 'result' used before being initialized

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return 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 result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return result!
}
<|file_separator|>
error = error // cannot assign to value: 'error' is immutable

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return 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 result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return result!
}
<|file_separator|>
error = error // cannot assign to value: 'error' is immutable

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return 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 result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return result!
}
<|file_separator|>
error = error // cannot assign to value: 'error' is immutable

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return 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 result: T?
    var error: Error?
    for _ in 0..<attempts {
        do {
            result = try task()
            break
        } catch {
            error = error
        }
    }
    if let error = error {
        throw error
    }
    return result!
}
<|file_separator|>
error = error // cannot assign to value: 'error' is immutable

func retry<T>(attempts: Int, task: @escaping () throws -> T) throws -> T {
    var attempts = attempts
    var result: T?
    repeat {
        do {
            result = try task()
            break
        } catch {
            if attempts == 1 {
                throw error
            }
            attempts -= 1
        }
    } while attempts > 0
    return 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 attempts = attempts
    var result: T?
    repeat {
        do {
            result = try task()
            break
        } catch {
            if attempts == 1 {
                throw error
            }
            attempts -= 1
        }
    } while attempts > 0
    return result!
}
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}
```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: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: 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 factories: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: type)] else {
            return nil
        }
        return factory() as? T
    }
}
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

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

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: 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 factories = [String: () -> Any]()

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

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

        return factory() as? T
    }
}

// Example usage:
let container = DIContainer()
container.register(Calculator.self) {
    Calculator()
}

let calculator = container.resolve(Calculator.self)
calculator?.add(1, 2)
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}
```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: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}

// Example usage:
let container = DIContainer()
container.register(Calculator.self) { Calculator() }
container.register(Calculator.self) { Calculator() }

let calculator1 = container.resolve(Calculator.self)
let calculator2 = container.resolve(Calculator.self)

print(calculator1 === calculator2) // true
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}
```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: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}

// Example usage:
let container = DIContainer()
container.register(Calculator.self) {
    Calculator()
}

let calculator = container.resolve(Calculator.self)
calculator?.add(1, 2)
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}
```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 = [String: () -> Any]()

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}

// Example usage:
let container = DIContainer()
container.register(Calculator.self) { Calculator() }
container.register(Calculator.self) { Calculator() }
container.register(Calculator.self) { Calculator() }

let calculator1 = container.resolve(Calculator.self)
let calculator2 = container.resolve(Calculator.self)
let calculator3 = container.resolve(Calculator.self)

print(calculator1 === calculator2) // true
print(calculator2 === calculator3) // true
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}
```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: [String: () -> Any] = [:]

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}

// Example usage:
let container = DIContainer()
container.register(Calculator.self) { Calculator() }
container.register(Logger.self) { Logger() }

let calculator = container.resolve(Calculator.self)
let logger = container.resolve(Logger.self)

calculator.add(1, 2)
logger.log("Addition result: \(calculator.result)")
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

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

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: 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 factories = [String: () -> Any]()

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

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

        return factory() as? T
    }
}
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

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

    func resolve<T>(_ type: T.Type) -> T? {
        guard let factory = factories[String(describing: 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 factories = [String: () -> Any]()

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

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

// Example usage:
let container = DIContainer()
container.register(Calculator.self) { Calculator() }
container.register(Calculator.self) { Calculator() }
container.register(Calculator.self) { Calculator() }

let calculator1 = container.resolve(Calculator.self)
let calculator2 = container.resolve(Calculator.self)
let calculator3 = container.resolve(Calculator.self)

print(calculator1 === calculator2) // true
print(calculator2 === calculator3) // true
<|file_separator|>

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

class DIContainer: DIContainerProtocol {
    private var factories = [String: () -> Any]()

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}
```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 = [String: () -> Any]()

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

    func resolve<T>(_ type: T.Type) -> T? {
        if let factory = factories[String(describing: type)] {
            return factory() as? T
        }
        return nil
    }
}

// Example usage:
let container = DIContainer()
container.register(String.self) { "Hello, world!" }
let message = container.resolve(String.self)
print(message) // Output: "Hello, world!"
<|file_separator|>

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 {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State
    
    init(state: State) {
        self.currentState = state
    }
    
    var state: State {
        get {
            return currentState
        }
    }
    
    func trigger(event: Event) {
        if let nextState = transitions[currentState, default: [:]][event] {
            currentState = nextState
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State
    
    init(state: State) {
        self.currentState = state
    }
    
    var state: State {
        get {
            return currentState
        }
    }
    
    func trigger(event: Event) {
        if let nextState = transitions[currentState, default: [:]][event] {
            currentState = nextState
        }
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .state1)
stateMachine.registerTransition(from: .state1, to: .state2, event: .event1)
stateMachine.trigger(event: .event1)
print(stateMachine.state) // Output: .state2
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition not found for state \(currentState) and event \(event)")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition not found for state \(currentState) and event \(event)")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .state1)
stateMachine.registerTransition(from: .state1, to: .state2, event: .event1)
stateMachine.trigger(event: .event1)
print(stateMachine.state) // Output: .state2
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    private var currentState: State
    private var transitions: [State: [Event: State]] = [:]

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("No transition found for state \(currentState) and event \(event)")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var currentState: State
    private var transitions: [State: [Event: State]] = [:]

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("No transition found for state \(currentState) and event \(event)")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .idle)

// Register transitions
stateMachine.registerTransition(from: .idle, to: .loading, event: .start)
stateMachine.registerTransition(from: .loading, to: .idle, event: .cancel)

// Trigger transitions
stateMachine.trigger(event: .start) // Transition to loading state
stateMachine.trigger(event: .cancel) // Transition to idle state
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

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

// Example usage:
let stateMachine = StateMachine(state: .state1)
stateMachine.registerTransition(from: .state1, to: .state2, event: .event1)
stateMachine.trigger(event: .event1)
print(stateMachine.state) // Output: .state2
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    private var currentState: State
    private var transitions: [State: [Event: State]] = [:]

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition from \(currentState) to \(event) is not registered.")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var currentState: State
    private var transitions: [State: [Event: State]] = [:]

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition from \(currentState) to \(event) is not registered.")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .state1)
stateMachine.registerTransition(from: .state1, to: .state2, event: .event1)
stateMachine.trigger(event: .event1)
print(stateMachine.state) // Output: .state2
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        if let nextState = transitions[currentState, default: [:]][event] {
            currentState = nextState
        }
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        if let nextState = transitions[currentState, default: [:]][event] {
            currentState = nextState
        }
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .idle)
stateMachine.registerTransition(from: .idle, to: .loading, event: .start)
stateMachine.registerTransition(from: .loading, to: .idle, event: .stop)

stateMachine.trigger(event: .start) // Transition to loading state
print(stateMachine.state) // Output: loading

stateMachine.trigger(event: .stop) // Transition to idle state
print(stateMachine.state) // Output: idle
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    private var currentState: State
    private var transitions: [State: [Event: State]]
    
    init(state: State) {
        self.currentState = state
        self.transitions = [:]
    }
    
    var state: State {
        get {
            return currentState
        }
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition from state \(currentState) to event \(event) not found.")
        }
        currentState = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var currentState: State
    private var transitions: [State: [Event: State]]
    
    init(state: State) {
        self.currentState = state
        self.transitions = [:]
    }
    
    var state: State {
        get {
            return currentState
        }
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition from state \(currentState) to event \(event) not found.")
        }
        currentState = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .state1)
stateMachine.registerTransition(from: .state1, to: .state2, event: .event1)
stateMachine.trigger(event: .event1)
print(stateMachine.state) // Output: state2
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition from \(currentState) to \(event) is not registered.")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State

    init(state: State) {
        self.currentState = state
    }

    var state: State {
        get {
            return currentState
        }
    }

    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition from \(currentState) to \(event) is not registered.")
        }
        currentState = nextState
    }

    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .idle)
stateMachine.registerTransition(from: .idle, to: .loading, event: .start)
stateMachine.registerTransition(from: .loading, to: .idle, event: .cancel)
stateMachine.trigger(event: .start)
print(stateMachine.state) // Output: loading
stateMachine.trigger(event: .cancel)
print(stateMachine.state) // Output: idle
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

class StateMachine<State: Hashable, Event: Hashable>: StateMachineProtocol {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State
    
    init(state: State) {
        self.currentState = state
    }
    
    var state: State {
        get {
            return currentState
        }
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition not found for state \(currentState) and event \(event)")
        }
        currentState = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][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 {
    private var transitions: [State: [Event: State]] = [:]
    private var currentState: State
    
    init(state: State) {
        self.currentState = state
    }
    
    var state: State {
        get {
            return currentState
        }
    }
    
    func trigger(event: Event) {
        guard let nextState = transitions[currentState, default: [:]][event] else {
            fatalError("Transition not found for state \(currentState) and event \(event)")
        }
        currentState = nextState
    }
    
    func registerTransition(from: State, to: State, event: Event) {
        transitions[from, default: [:]][event] = to
    }
}

// Example usage:
let stateMachine = StateMachine(state: .state1)
stateMachine.registerTransition(from: .state1, to: .state2, event: .event1)
stateMachine.registerTransition(from: .state2, to: .state3, event: .event2)

stateMachine.trigger(event: .event1) // Transition to state2
stateMachine.trigger(event: .event2) // Transition to state3

print(stateMachine.state) // Output: state3
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<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)
}

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

// Example usage:
let stateMachine = StateMachine(state: .idle)
stateMachine.registerTransition(from: .idle, to: .working, event: .start)
stateMachine.registerTransition(from: .working, to: .idle, event: .stop)

stateMachine.trigger(event: .start)
print(stateMachine.state) // Output: working

stateMachine.trigger(event: .stop)
print(stateMachine.state) // Output: idle
<|file_separator|>
init(state: State) { // initializer requirement 'init(state:)' can only be satisfied by a 'required' initializer in non-final class 'StateMachine<State, Event>'

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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.map { $0.totalSize }.reduce(0, +)
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.filesCount }.reduce(0, +)
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.map { $0.treeDepth }.max()!
        }
    }
}

class FileSystemManager {
    private let root: FileSystemNode

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

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

class FileSystemTreeBuilder {
    private let root: FileSystemNode

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

    func build() -> FileSystemNode {
        root
    }
}

class FileSystemMetadataCalculator {
    private let root: FileSystemNode

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

    func calculate() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
    }
}

class FileSystemTreeBuilderAndMetadataCalculator {
    private let root: FileSystemNode

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

    func build() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.map { $0.totalSize }.reduce(0, +)
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.filesCount }.reduce(0, +)
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.map { $0.treeDepth }.max()!
        }
    }
}

// File system manager.
// Used to create file system tree and calculate total size of all files in file system.
class FileSystemManager {
    private let root: FileSystemNode

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

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

// File system tree builder.
// Used to create file system tree.
class FileSystemTreeBuilder {
    private let root: FileSystemNode

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

    func build() -> FileSystemNode {
        root
    }
}

// File system metadata calculator.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemMetadataCalculator {
    private let root: FileSystemNode

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

    func calculate() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
    }
}

// File system tree builder and metadata calculator.
// Used to create file system tree and calculate total size of all files in file system.
class FileSystemTreeBuilderAndMetadataCalculator {
    private let root: FileSystemNode

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

    func build() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
    }
}

// File system tree builder and metadata calculator.
// Used to create file system tree and calculate total size of all files in file system.
class FileSystemTreeBuilderAndMetadataCalculator {
    private let root: FileSystemNode

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

    func build() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
    }
}

// File system tree builder and metadata calculator.
// Used to create file system tree and calculate total size of all files in file system.
class FileSystemTreeBuilderAndMetadataCalculator {
    private let root: FileSystemNode

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

    func build() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
    }
}

// File system tree builder and metadata calculator.
// Used to create file system tree and calculate total size of all files in file system.
class FileSystemTreeBuilderAndMetadataCalculator {
    private let root: FileSystemNode

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

    func build() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
    }
}

// File system tree builder and metadata calculator.
// Used to create file system tree and calculate total size of all files in file system.
class FileSystemTreeBuilderAndMetadataCalculator {
    private let root: FileSystemNode

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

    func build() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
    }
}

// File system tree builder and metadata calculator.
// Used to create file system tree and calculate total size of all files in file system.
class FileSystemTreeBuilderAndMetadataCalculator {
    private let root: FileSystemNode

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

    func build() -> FileSystemInfo {
        root.totalSize
        root.filesCount
        root.treeDepth
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
root.totalSize // expression of type 'Int' is unused
root.filesCount // expression of type 'Int' is unused
root.treeDepth // expression of type 'Int' is unused
} // missing return in instance method expected to return 'any FileSystemInfo'
root.totalSize // expression of type 'Int' is unused
root.filesCount // expression of type 'Int' is unused
root.treeDepth // expression of type 'Int' is unused
} // missing return in instance method expected to return 'any FileSystemInfo'

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

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

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) {
                max($0, $1.treeDepth)
            } + 1
        }
    }
}

extension FileSystemNode {
    static func calculateMetadata(for root: FileSystemNode) -> FileSystemInfo {
        switch root {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { calculateMetadata(for: $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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) {
                max($0, $1.treeDepth)
            } + 1
        }
    }
}

// Concrete file system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    static func calculateMetadata(for root: FileSystemNode) -> FileSystemInfo {
        switch root {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { calculateMetadata(for: $0) })
        }
    }
}

// Example usage.
let root = FileSystemNode.directory(
    name: "root",
    contents: [
        .directory(name: "dir1", contents: [
            .file(name: "file1", size: 100),
            .file(name: "file2", size: 200),
            .directory(name: "dir2", contents: [
                .file(name: "file3", size: 300),
                .file(name: "file4", size: 400),
            ]),
        ]),
        .file(name: "file5", size: 500),
        .file(name: "file6", size: 600),
    ]
)

let metadata = FileSystemNode.calculateMetadata(for: root)
print("Total size:", metadata.totalSize)
print("Files count:", metadata.filesCount)
print("Tree depth:", metadata.treeDepth)
<|file_separator|>
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
return .file(name: name, size: size) // type 'any FileSystemInfo' has no member 'file'
return .directory(name: name, contents: contents.map { calculateMetadata(for: $0) }) // type 'any FileSystemInfo' has no member 'directory'

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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.map { $0.totalSize }.reduce(0, +)
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.filesCount }.reduce(0, +)
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.treeDepth }.max() ?? 1
        }
    }
}

extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}
```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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.map { $0.totalSize }.reduce(0, +)
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.filesCount }.reduce(0, +)
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.treeDepth }.max() ?? 1
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}

// File system manager.
// Used to calculate total size of all files in file system, files count and file system tree depth.
extension FileSystemNode {
    func calculateMetadata() -> FileSystemInfo {
        switch self {
        case .file(let name, let size):
            return .file(name: name, size: size)
        case .directory(let name, let contents):
            return .directory(name: name, contents: contents.map { $0.calculateMetadata() })
        }
    }
}

// File system manager.
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
return .file(name: name, size: size) // type 'any FileSystemInfo' has no member 'file'
return .directory(name: name, contents: contents.map { $0.calculateMetadata() }) // type 'any FileSystemInfo' has no member 'directory'

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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) {
                let depth = $1.treeDepth
                return max(depth, $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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) {
                let depth = $1.treeDepth
                return max(depth, $0)
            }
        }
    }
}

// Example usage:
let fileSystem = [
    .directory(name: "root", contents: [
        .directory(name: "dir1", contents: [
            .file(name: "file1", size: 100),
            .file(name: "file2", size: 200),
        ]),
        .directory(name: "dir2", contents: [
            .file(name: "file3", size: 300),
            .file(name: "file4", size: 400),
        ]),
    ]),
]

let fileSystemInfo = FileSystemInfo(fileSystem)
print("Total size:", fileSystemInfo.totalSize)
print("Files count:", fileSystemInfo.filesCount)
print("Tree depth:", fileSystemInfo.treeDepth)
<|file_separator|>
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
 // XCTAssertEqual failed: (0) is not equal to (1)

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

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

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

class FileSystemManager {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { max($0, $1.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 {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        root.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 {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        root.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 {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        root.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 {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        root.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 {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        root.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 {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        root.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 {
    private let root: FileSystemNode

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

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

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

    func treeDepth() -> Int {
        root.treeDepth
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
 // XCTAssertEqual failed: (0) is not equal to (1)

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

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

extension FileSystemNode: FileSystemInfo {
    var totalSize: Int {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 0
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

extension FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 0
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

// 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 FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 0
    }
}

// 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 FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 0
    }
}

// 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 FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 0
    }
}

// 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 FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 0
    }
}

// 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 FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 0
    }
}

// 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 FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 0
    }
}

// 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 FileSystemInfo {
    var totalSize: Int {
        return self.filesCount == 0 ? 0 : self.totalSize
    }

    var filesCount: Int {
        return self.treeDepth == 0 ? 1 : 0
    }

    var treeDepth: Int {
        return 0
    }
}

// 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 FileSystemInfo {
    var totalSize
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
 // XCTAssertEqual failed: (3) is not equal to (4)

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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.map { $0.totalSize }.reduce(0, +)
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.filesCount }.reduce(0, +)
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.treeDepth }.max() ?? 1
        }
    }
}

class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.filesCount }.reduce(0, +)
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.map { $0.treeDepth }.max() ?? 1
        }
    }
}

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// Example usage:
let root = FileSystemNode.directory(name: "root", contents: [
    FileSystemNode.file(name: "file1", size: 100),
    FileSystemNode.directory(name: "dir1", contents: [
        FileSystemNode.file(name: "file2", size: 50),
        FileSystemNode.file(name: "file3", size: 200)
    ])
])

let fileSystemManager = FileSystemManager(root: root)

print("Total size:", fileSystemManager.totalSize())
print("Files count:", fileSystemManager.filesCount())
print("Tree depth:", fileSystemManager.treeDepth())
<|file_separator|>
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
 // XCTAssertEqual failed: (1) is not equal to (4)

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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { $0 + $1.treeDepth }
        }
    }
}

class FileSystemManager {
    private let root: FileSystemNode

    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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { $0 + $1.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 {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

    func filesCount() -> Int {
        return root.
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
 // XCTAssertEqual failed: (6) is not equal to (4)

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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { $0 + $1.treeDepth }
        }
    }
}

class FileSystemManager {
    private var root: FileSystemNode

    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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { $0 + $1.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 {
    private var root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private var root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private var root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private var root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private var root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private var root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private var root: FileSystemNode

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

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

    func filesCount() -> Int {
        return root.
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
 // XCTAssertEqual failed: (6) is not equal to (4)

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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { max($0, $1.treeDepth) }
        }
    }
}

class FileSystemManager {
    private let root: FileSystemNode

    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 {
        switch self {
        case .file(let name, let size):
            return size
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.totalSize }
        }
    }

    var filesCount: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return contents.reduce(0) { $0 + $1.filesCount }
        }
    }

    var treeDepth: Int {
        switch self {
        case .file(let name, _):
            return 1
        case .directory(let name, let contents):
            return 1 + contents.reduce(0) { max($0, $1.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 {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

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

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

// File system manager implementation.
// Used to calculate total size of all files in file system, files count and file system tree depth.
class FileSystemManager {
    private let root: FileSystemNode

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

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

    func filesCount() -> Int {
        return
case .file(let name, let size): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .file(let name, _): // immutable value 'name' was never used; consider replacing with '_' or removing it
case .directory(let name, let contents): // immutable value 'name' was never used; consider replacing with '_' or removing it

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
    
    func isEmpty() -> Bool {
        // Check if the elements array is empty.
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
    
    func isEmpty() -> Bool {
        // Check if the elements array is empty.
    }
    
    func size() -> Int {
        // Return the number of elements in the elements array.
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
    
    func isEmpty() -> Bool {
        // Check if the elements array is empty.
    }
    
    func size() -> Int {
        // Return the number of elements in the elements array.
    }
    
    func top() -> Element? {
        // Return the last element from the elements array without removing it.
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
    
    func isEmpty() -> Bool {
        // Check if the elements array is empty.
    }
}

// Generic stack with push, pop, peek, isEmpty, and size functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
    
    func isEmpty() -> Bool {
        // Check if the elements array is empty.
    }
    
    func size() -> Int {
        // Return the number of elements in the elements array.
    }
}

// Generic stack with push, pop, peek, isEmpty, size, and top functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
    
    func isEmpty() -> Bool {
        // Check if the elements array is empty.
    }
    
    func size() -> Int {
        // Return the number of elements in the elements array.
    }
    
    func top() -> Element? {
        // Return the last element from the elements array without removing it.
    }
}

// Generic stack with push, pop, peek, isEmpty, size, top, and toArray functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {
        // Initialize the elements array.
    }
    
    func push(_ element: Element) {
        // Add the element to the elements array.
    }
    
    func pop() -> Element? {
        // Remove and return the last element from the elements array.
    }
    
    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
    }
    
    func isEmpty() -> Bool {
        // Check if the elements array is empty.
    }
    
    func size() -> Int {
        // Return the number of elements in the elements array.
    }
    
    func top() -> Element? {
        // Return the last element from the elements array without removing it.
    
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
}

class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func toArray() -> [Element] {
        return elements
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and toArray functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func toArray() -> [Element] {
        return elements
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, toArray, and toDictionary functions.
class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func toArray() -> [Element] {
        return elements
    }
    
    func toDictionary()
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }

    func top() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }

    func top() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }

    func top() -> Element? {
        
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func toArray() -> [Element] {
        return elements
    }
}

class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func toArray() -> [Element] {
        return elements
    }

    func clear() {
        elements.removeAll()
    }
}

class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func toArray() -> [Element] {
        return elements
    }

    func clear() {
        elements.removeAll()
    }

    func contains(_ element: Element) -> Bool {
        return elements.contains(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 {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and toArray functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func toArray() -> [Element] {
        return elements
    }
}

// Generic stack with push, pop, peek, isEmpty, count, toArray, and clear functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func toArray() -> [Element] {
        return elements
    }

    func clear() {
        elements.removeAll()
    }
}

// Generic stack with push, pop, peek, isEmpty, count, toArray, clear, and contains functions.
class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        return elements.popLast()
    }

    func peek() -> Element? {
        return elements.last
    }

    func isEmpty() -> Bool {
        return elements.isEmpty
    }

    func count() -> Int {
        return elements.count
    }

    func toArray() -> [Element] {
        return elements
    }

    func clear() {
        elements.removeAll()
    }

    func contains(_ element: Element) -> Bool {
        return elements.contains(element)
    }
}

// Generic stack with push, pop, peek, isEmpty, count, toArray, clear, contains, and remove functions.
class Stack8<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'
return elements.contains(element) // missing argument label 'where:' in call
return elements.contains(element) // cannot convert value of type 'Element' to expected argument type '(Element) throws -> Bool'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
}

class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func bottom() -> Element? {
        return elements.first
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func bottom() -> Element? {
        return elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, and toArray functions.
class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func bottom() -> Element? {
        return elements.first
    }
    
    func toArray()
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }
}

class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }
}

class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }

    func contains(_ element: Element) -> Bool {
        elements.contains(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 {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, and contains functions.
class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func count() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }

    func contains(_ element: Element) -> Bool {
        elements.contains(element)
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, contains, and toArray functions.
class Stack8<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'
elements.contains(element) // missing argument label 'where:' in call
elements.contains(element) // cannot convert value of type 'Element' to expected argument type '(Element) throws -> Bool'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }
}

class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }
}

class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }

    func clear() {
        elements.removeAll()
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and size functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, size, and top functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, size, top, and bottom functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, size, top, bottom, and clear functions.
class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element? {
        elements.last
    }

    func isEmpty() -> Bool {
        elements.isEmpty
    }

    func size() -> Int {
        elements.count
    }

    func top() -> Element? {
        elements.last
    }

    func bottom() -> Element? {
        elements.first
    }

    func clear() {
        elements.removeAll()
    }
}

// Generic stack with push, pop, peek, isEmpty, size, top, bottom, clear, and contains functions.
class Stack8<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {}

    func push(_ element: Element) {
        elements.append(element)
    }

    func pop() -> Element? {
        elements.popLast()
    }

    func peek() -> Element?
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
}

class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func bottom() -> Element? {
        return elements.first
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and top functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, and bottom functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func bottom() -> Element? {
        return elements.first
    }
}

// Generic stack with push, pop, peek, isEmpty, count, top, bottom, and middle functions.
class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
    
    func peek() -> Element? {
        return elements.last
    }
    
    func isEmpty() -> Bool {
        return elements.isEmpty
    }
    
    func count() -> Int {
        return elements.count
    }
    
    func top() -> Element? {
        return elements.last
    }
    
    func bottom() -> Element? {
        return elements.first
    }
    
    func middle()
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack8<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack9<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack10<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack11<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

class Stack12<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack7<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack8<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack9<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack10<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack11<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack12<Element>: StackProtocol {
    private var elements: [Element] = []
    
    init() {}
    
    func push(_ element: Element) {
        elements.append(element)
    }
    
    func pop() -> Element? {
        return elements.popLast()
    }
}

// Generic stack with push and pop functions.
class Stack13<
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack6<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack7<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack8<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack9<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack10<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack11<Element>'
init() {} // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack12<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

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

class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }
}

class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }
}

class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }
}

class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }
}

class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }

    func toArray() -> [Element] {
        // Return a copy of the elements array.
        return []
    }
}
```swift
protocol StackProtocol {
    associatedtype Element
    init()
    func push(_ element: Element)
    func pop() -> Element?
}

// Generic stack with push and pop functions.
class Stack<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }
}

// Generic stack with push, pop, and peek functions.
class Stack2<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }
}

// Generic stack with push, pop, peek, and isEmpty functions.
class Stack3<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }
}

// Generic stack with push, pop, peek, isEmpty, and count functions.
class Stack4<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }
}

// Generic stack with push, pop, peek, isEmpty, count, and toArray functions.
class Stack5<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }

    func toArray() -> [Element] {
        // Return a copy of the elements array.
        return []
    }
}

// Generic stack with push, pop, peek, isEmpty, count, toArray, and clear functions.
class Stack6<Element>: StackProtocol {
    private var elements: [Element] = []

    init() {
        // Initialize the elements array.
    }

    func push(_ element: Element) {
        // Add the element to the elements array.
    }

    func pop() -> Element? {
        // Remove and return the last element from the elements array.
        return nil
    }

    func peek() -> Element? {
        // Return the last element from the elements array without removing it.
        return nil
    }

    func isEmpty() -> Bool {
        // Check if the elements array is empty.
        return true
    }

    func count() -> Int {
        // Return the number of elements in the elements array.
        return 0
    }

    func toArray() -> [Element] {
        // Return
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack2<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack3<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack4<Element>'
init() { // initializer requirement 'init()' can only be satisfied by a 'required' initializer in non-final class 'Stack5<Element>'
var stack = Stack<Int>() // variable 'stack' was never mutated; consider changing to 'let' constant

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Value] = [:]
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    leastRecentlyUsed.removeFirst()
                }
                leastRecentlyUsed.append(key)
                cache[key] = newValue
            } else {
                cache.removeValue(Harrison: 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, Value>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Value] = [:]
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    leastRecentlyUsed.removeFirst()
                }
                leastRecentlyUsed.append(key)
                cache[key] = newValue
            } else {
                cache.removeValue(Harrison: key)
            }
        }
    }
}
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
cache.removeValue(Harrison: key) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var storage: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = storage[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = storage[key] {
                storage[key] = newValue
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
            } else {
                if storage.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    storage.removeValue(Harrison: leastRecentlyUsedKey)
                }
                storage[key] = newValue
                leastRecentlyUsed.append(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, Value>: CacheProtocol {
    private var storage: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = storage[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = storage[key] {
                storage[key] = newValue
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
            } else {
                if storage.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    storage.removeValue(Harrison: leastRecentlyUsedKey)
                }
                storage[key] = newValue
                leastRecentlyUsed.append(key)
            }
        }
    }
}

// Example usage:
let cache = Cache<String, String>(capacity: 3)
cache["apple"] = "A fruit"
cache["banana"] = "A yellow fruit"
cache["orange"] = "A citrus fruit"
cache["grape"] = "A small fruit"

print(cache["apple"]) // Prints "A fruit"
print(cache["banana"]) // Prints "A yellow fruit"
print(cache["orange"]) // Prints "A citrus fruit"
print(cache["grape"]) // Prints "A small fruit"
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
storage.removeValue(Harrison: leastRecentlyUsedKey) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Value] = [:]
    private var accessOrder: [Key] = []
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
                accessOrder.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if accessOrder.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(Harrison: leastRecentlyUsedKey)
                }
                accessOrder.append(key)
                cache[key] = newValue
            }
        }
    }
}
```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, Value>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Value] = [:]
    private var accessOrder: [Key] = []
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                accessOrder.remove(at: accessOrder.firstIndex(of: key)!)
                accessOrder.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if accessOrder.count == capacity {
                    let leastRecentlyUsedKey = accessOrder.first!
                    accessOrder.removeFirst()
                    cache.removeValue(Harrison: leastRecentlyUsedKey)
                }
                accessOrder.append(key)
                cache[key] = newValue
            }
        }
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 3)
cache["apple"] = 10
cache["banana"] = 20
cache["cherry"] = 30
cache["apple"] = 40
print(cache["apple"]) // Output: 40
print(cache["banana"]) // Output: 20
print(cache["cherry"]) // Output: 30
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
cache.removeValue(Harrison: leastRecentlyUsedKey) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                cache[key] = newValue
                leastRecentlyUsed.append(key)
                if leastRecentlyUsed.count > capacity {
                    leastRecentlyUsed.removeFirst()
                }
            } else {
                cache.removeValue(Harrison: 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, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                cache[key] = newValue
                leastRecentlyUsed.append(key)
                if leastRecentlyUsed.count > capacity {
                    leastRecentlyUsed.removeFirst()
                }
            } else {
                cache.removeValue(Harrison: key)
            }
        }
    }
}

// Example usage:
let cache = Cache<String, Int>(capacity: 3)
cache["apple"] = 1
cache["banana"] = 2
cache["cherry"] = 3
print(cache["apple"]) // Output: 1
print(cache["banana"]) // Output: 2
print(cache["cherry"]) // Output: 3
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
cache.removeValue(Harrison: key) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            return cache[key]
        }
        set {
            if let value = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeLast()
                    cache.removeValue(Johnson: leastRecentlyUsedKey)
                }
                cache[key] = value
                leastRecentlyUsed.insert(key, at: 0)
            } else {
                cache.removeValue(Lurton: 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, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            return cache[key]
        }
        set {
            if let value = newValue {
                if cache.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeLast()
                    cache.removeValue(Johnson: leastRecentlyUsedKey)
                }
                cache[key] = value
                leastRecentlyUsed.insert(key, at: 0)
            } else {
                cache.removeValue(Lurton: key)
            }
        }
    }
}

// Example usage:
let cache = Cache<String, String>(capacity: 3)
cache["apple"] = "fruit"
cache["banana"] = "fruit"
cache["orange"] = "fruit"
cache["grape"] = "fruit"
print(cache["apple"]) // Output: "fruit"
print(cache["banana"]) // Output: "fruit"
print(cache["orange"]) // Output: "fruit"
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
cache.removeValue(Johnson: leastRecentlyUsedKey) // incorrect argument label in call (have 'Johnson:', expected 'forKey:')
cache.removeValue(Lurton: key) // incorrect argument label in call (have 'Lurton:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    cache.removeValue(Harrison: leastRecentlyUsedKey)
                }
                leastRecentlyUsed.append(key)
            }
            cache[key] = newValue
        }
    }
}
```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, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    cache.removeValue(Harrison: leastRecentlyUsedKey)
                }
                leastRecentlyUsed.append(key)
            }
            cache[key] = newValue
        }
    }
}

// Example usage:
let cache = Cache<String, String>(capacity: 3)
cache["apple"] = "fruit"
cache["banana"] = "fruit"
cache["orange"] = "fruit"
cache["grape"] = "fruit" // This will remove "apple" from the cache

print(cache["apple"]) // Output: "fruit"
print(cache["banana"]) // Output: "fruit"
print(cache["orange"]) // Output: "fruit"
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
cache.removeValue(Harrison: leastRecentlyUsedKey) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Value] = [:]
    private var leastRecentlyUsed: [Key] = []
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
            } else if leastRecentlyUsed.count == capacity {
                leastRecentlyUsed.removeFirst()
            }
            cache[key] = newValue
        }
    }
}
```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, Value>: CacheProtocol {
    private var capacity: Int
    private var cache: [Key: Value] = [:]
    private var leastRecentlyUsed: [Key] = []
    
    init(capacity: Int) {
        self.capacity = capacity
    }
    
    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
            } else if leastRecentlyUsed.count == capacity {
                leastRecentlyUsed.removeFirst()
            }
            cache[key] = newValue
        }
    }
}

// Example usage:
let cache = Cache<String, String>(capacity: 3)
cache["apple"] = "fruit"
cache["banana"] = "fruit"
cache["orange"] = "fruit"
cache["grape"] = "fruit"
print(cache["apple"]) // Output: "fruit"
print(cache["banana"]) // Output: "fruit"
print(cache["orange"]) // Output: "fruit"
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var storage: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = storage[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                storage[key] = newValue
                leastRecentlyUsed.append(key)
                if leastRecentlyUsed.count > capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    storage.removeValue(Wilson: leastRecentlyUsedKey)
                }
            }
        }
    }
}
```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, Value>: CacheProtocol {
    private var storage: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = storage[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                storage[key] = newValue
                leastRecentlyUsed.append(key)
                if leastRecentlyUsed.count > capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    storage.removeValue(Wilson: leastRecentlyUsedKey)
                }
            }
        }
    }
}

// Example usage:
let cache = Cache<String, String>(capacity: 3)
cache["apple"] = "fruit"
cache["banana"] = "fruit"
cache["orange"] = "fruit"
cache["grape"] = "fruit" // This should remove "apple" from the cache
print(cache["apple"]) // Output: "fruit"
print(cache["banana"]) // Output: "fruit"
print(cache["orange"]) // Output: "fruit"
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
storage.removeValue(Wilson: leastRecentlyUsedKey) // incorrect argument label in call (have 'Wilson:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    cache.removeValue(McReynolds: leastRecentlyUsedKey)
                }
                leastRecentlyUsed.append(key)
            }
            cache[key] = newValue
        }
    }
}
```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, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    let leastRecentlyUsedKey = leastRecentlyUsed.removeFirst()
                    cache.removeValue(McReynolds: leastRecentlyUsedKey)
                }
                leastRecentlyUsed.append(key)
            }
            cache[key] = newValue
        }
    }
}

// Example usage:
let cache = Cache<String, String>(capacity: 3)
cache["apple"] = "fruit"
cache["banana"] = "fruit"
cache["orange"] = "fruit"
cache["grape"] = "fruit" // This should remove "apple" from the cache

print(cache["apple"]) // Output: "fruit"
print(cache["banana"]) // Output: "fruit"
print(cache["orange"]) // Output: "fruit"
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
cache.removeValue(McReynolds: leastRecentlyUsedKey) // incorrect argument label in call (have 'McReynolds:', expected 'forKey:')

protocol CacheProtocol {
    associatedtype Key: Hashable
    associatedtype Element
    init(capacity: Int)
    subscript(key: Key) -> Element? { get set }
}

class Cache<Key: Hashable, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    cache.removeValue(Harrison: leastRecentlyUsed.first!)
                    leastRecentlyUsed.removeFirst()
                }
                leastRecentlyUsed.append(key)
                cache[key] = newValue
            }
        }
    }
}
```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, Value>: CacheProtocol {
    private var cache: [Key: Value] = [:]
    private var capacity: Int
    private var leastRecentlyUsed: [Key] = []

    init(capacity: Int) {
        self.capacity = capacity
    }

    subscript(key: Key) -> Value? {
        get {
            if let value = cache[key] {
                leastRecentlyUsed.remove(at: leastRecentlyUsed.firstIndex(of: key)!)
                leastRecentlyUsed.append(key)
                return value
            }
            return nil
        }
        set {
            if let _ = newValue {
                if leastRecentlyUsed.count == capacity {
                    cache.removeValue(Harrison: leastRecentlyUsed.first!)
                    leastRecentlyUsed.removeFirst()
                }
                leastRecentlyUsed.append(key)
                cache[key] = newValue
            }
        }
    }
}

// Example usage:
let cache = Cache<String, String>(capacity: 3)
cache["apple"] = "fruit"
cache["banana"] = "fruit"
cache["cherry"] = "fruit"
cache["grape"] = "fruit"
print(cache["apple"]) // Output: "fruit"
print(cache["banana"]) // Output: "fruit"
print(cache["cherry"]) // Output: "fruit"
print(cache["grape"]) // Output: nil
<|file_separator|>
init(capacity: Int) { // initializer requirement 'init(capacity:)' can only be satisfied by a 'required' initializer in non-final class 'Cache<Key, Value>'
cache.removeValue(Harrison: leastRecentlyUsed.first!) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expirationTimes = [Key: TimeInterval]()
    private var expirationTimesQueue = [Key]()

    private let expirationInterval: TimeInterval
    private let expirationQueue = DispatchQueue(label: "expirationQueue")
    private var isRunning = false

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        startExpirationTimer()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expirationTimes[key] = Date().timeIntervalSince1970 + expiration
        expirationTimesQueue.append(key)
    }

    func get(key: Key) -> Value? {
        if let value = cache[key] {
            return value
        }
        return nil
    }

    private func startExpirationTimer() {
        if !isRunning {
            isRunning = true
            expirationQueue.async {
                while true {
                    let now = Date().timeIntervalSince1970
                    for key in self.expirationTimesQueue {
                        if now > self.expirationTimes[key]! {
                            self.cache.removeValue(McKinley: key)
                            self.expirationTimes.removeValue(Wilson: key)
                            self.expirationTimesQueue.remove(at: self.expirationTimesQueue.firstIndex(of: key)!)
                        }
                    }
                    Thread.sleep(forTimeInterval: self.expirationInterval)
                }
            }
        }
    }
}
```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache = [Key: Value]()
    private var expirationTimes = [Key: TimeInterval]()
    private var expirationTimesQueue = [Key]()

    private let expirationInterval: TimeInterval
    private let expirationQueue = DispatchQueue(label: "expirationQueue")
    private var isRunning = false

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        startExpirationTimer()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expirationTimes[key] = Date().timeIntervalSince1970 + expiration
        expirationTimesQueue.append(key)
    }

    func get(key: Key) -> Value? {
        if let value = cache[key] {
            return value
        }
        return nil
    }

    private func startExpirationTimer() {
        if !isRunning {
            isRunning = true
            expirationQueue.async {
                while true {
                    let now = Date().timeIntervalSince1970
                    for key in self.expirationTimesQueue {
                        if now > self.expirationTimes[key]! {
                            self.cache.removeValue(McKinley: key)
                            self.expirationTimes.removeValue(Wilson: key)
                            self.expirationTimesQueue.remove(at: self.expirationTimesQueue.firstIndex(of: key)!)
                        }
                    }
                    Thread.sleep(forTimeInterval: self.expirationInterval)
                }
            }
        }
    }
}

// Example usage:
let cache = ExpirableCache<String, String>(expirationInterval: 10)
cache.put(value: "Hello, world!", key: "greeting", expiration: 30)
let greeting = cache.get(key: "greeting")
print(greeting) // Prints "Hello, world!"
<|file_separator|>
self.cache.removeValue(McKinley: key) // incorrect argument label in call (have 'McKinley:', expected 'forKey:')
let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' in call
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

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 {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private var expirationTimesQueue: [Key: TimeInterval] = [:]
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock
let cache = ExpirableCache<String, String>() // cannot find 'ExpirableCache' in scope
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private let expirationInterval: TimeInterval
    private let queue = DispatchQueue(label: "ExpirableCache")

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        self.startExpirationTimer()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        queue.async {
            self.cache[key] = value
            self.expirationTimes[key] = Date().timeIntervalSince1970 + expiration
        }
    }

    func get(key: Key) -> Value? {
        queue.sync {
            if let value = cache[key] {
                if expirationTimes[key] ?? 0 > Date().timeIntervalSince1970 {
                    return value
                } else {
                    cache.removeValue(Hayes: key)
                    expirationTimes.removeValue(Wilson: key)
                }
            }
            return nil
        }
    }

    private func startExpirationTimer() {
        let timer = DispatchSource.makeTimerSource(queue: queue)
        timer.scheduleRepeating(interval: expirationInterval)
        timer.setEventHandler { [weak self] in
            self?.queue.async {
                self?.expirationTimes.forEach { key, expirationTime in
                    if expirationTime < Date().timeIntervalSince1970 {
                        self?.cache.removeValue(McKinley: key)
                        self?.expirationTimes.removeValue(Harrison: key)
                    }
                }
            }
        }
        timer.resume()
    }
}
```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private let expirationInterval: TimeInterval
    private let queue = DispatchQueue(label: "ExpirableCache")

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        self.startExpirationTimer()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        queue.async {
            self.cache[key] = value
            self.expirationTimes[key] = Date().timeIntervalSince1970 + expiration
        }
    }

    func get(key: Key) -> Value? {
        queue.sync {
            if let value = cache[key] {
                if expirationTimes[key] ?? 0 > Date().timeIntervalSince1970 {
                    return value
                } else {
                    cache.removeValue(Hayes: key)
                    expirationTimes.removeValue(Wilson: key)
                }
            }
            return nil
        }
    }

    private func startExpirationTimer() {
        let timer = DispatchSource.makeTimerSource(queue: queue)
        timer.scheduleRepeating(interval: expirationInterval)
        timer.setEventHandler { [weak self] in
            self?.queue.async {
                self?.expirationTimes.forEach { key, expirationTime in
                    if expirationTime < Date().timeIntervalSince1970 {
                        self?.cache.removeValue(McKinley: key)
                        self?.expirationTimes.removeValue(Harrison: key)
                    }
                }
            }
        }
        timer.resume()
    }
}

// Example usage:
let cache = ExpirableCache<String, String>(expirationInterval: 10)
cache["key1"] = "value1"
cache["key2"] = "value2"
cache["key3"] = "value3"
print(cache["key1"]) // Prints "value1"
print(cache["key2"]) // Prints "value2"
print(cache["key3"]) // Prints "value3"
print(cache["key4"]) // Prints nil
<|file_separator|>
cache.removeValue(Hayes: key) // incorrect argument label in call (have 'Hayes:', expected 'forKey:')
timer.scheduleRepeating(interval: expirationInterval) // missing argument for parameter 'deadline' in call
self?.cache.removeValue(McKinley: key) // incorrect argument label in call (have 'McKinley:', expected 'forKey:')
let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' in call
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private let expirationInterval: TimeInterval
    private let queue = DispatchQueue(label: "ExpirableCache")

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        self.startExpirationTimer()
    }

    private func startExpirationTimer() {
        let expirationTimer = DispatchSource.makeTimerSource(queue: queue)
        expirationTimer.schedule(deadline: .now() + expirationInterval)
        expirationTimer.setEventHandler { [weak self] in
            self?.evictExpiredValues()
        }
        expirationTimer.resume()
    }

    private func evictExpiredValues() {
        let now = Date()
        let expiredKeys = expirationTimes.filter { $0.value < now }.map { $0.key }
        for key in expiredKeys {
            cache.removeValue(Johnson: key)
            expirationTimes.removeValue(Harrison: key)
        }
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        queue.async { [weak self] in
            self?.cache[key] = value
            self?.expirationTimes[key] = Date().addingTimeInterval(expiration)
        }
    }

    func get(key: Key) -> Value? {
        queue.sync { [weak self] in
            return self?.cache[key]
        }
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            if let newValue = newValue {
                put(value: newValue, key: key, expiration: expirationInterval)
            } else {
                cache.removeValue(Harrison: key)
                expirationTimes.removeValue(Wilson: key)
            }
        }
    }
}
```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private let expirationInterval: TimeInterval
    private let queue = DispatchQueue(label: "ExpirableCache")

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        self.startExpirationTimer()
    }

    private func startExpirationTimer() {
        let expirationTimer = DispatchSource.makeTimerSource(queue: queue)
        expirationTimer.schedule(deadline: .now() + expirationInterval)
        expirationTimer.setEventHandler { [weak self] in
            self?.evictExpiredValues()
        }
        expirationTimer.resume()
    }

    private func evictExpiredValues() {
        let now = Date()
        let expiredKeys = expirationTimes.filter { $0.value < now }.map { $0.key }
        for key in expiredKeys {
            cache.removeValue(Johnson: key)
            expirationTimes.removeValue(Harrison: key)
        }
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        queue.async { [weak self] in
            self?.cache[key] = value
            self?.expirationTimes[key] = Date().addingTimeInterval(expiration)
        }
    }

    func get(key: Key) -> Value? {
        queue.sync { [weak self] in
            return self?.cache[key]
        }
    }

    subscript(key: Key) -> Value? {
        get {
            return get(key: key)
        }
        set {
            if let newValue = newValue {
                put(value: newValue, key: key, expiration: expirationInterval)
            } else {
                cache.removeValue(Harrison: key)
                expirationTimes.removeValue(Wilson: key)
            }
        }
    }
}
<|file_separator|>
let expiredKeys = expirationTimes.filter { $0.value < now }.map { $0.key } // cannot convert value of type 'TimeInterval' (aka 'Double') to expected argument type 'Date'
self?.expirationTimes[key] = Date().addingTimeInterval(expiration) // cannot assign value of type 'Date' to type 'TimeInterval?' (aka 'Optional<Double>')
cache.removeValue(Harrison: key) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')
expirationTimes.removeValue(Wilson: key) // incorrect argument label in call (have 'Wilson:', expected 'forKey:')
let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' in call
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

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 {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]

    // Put value in cache with expiration.
    func put(value: Value, key: Key, expiration: TimeInterval) {
        cache[key] = value
        expirationTimes[key] = Date().timeIntervalSince1970 + expiration
    }

    // Get value from cache.
    func get(key: Key) -> Value? {
        guard let value = cache[key] else { return nil }
        guard let expirationTime = expirationTimes[key] else { return value }
        if Date().timeIntervalSince1970 > expirationTime {
            cache.removeValue(Tyler: key)
            expirationTimes.removeValue(Wilson: key)
            return nil
        }
        return value
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval) -> Value? {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: nil, key: key, expiration: expirationTime)
        return nil
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: @autoclosure () -> Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: defaultValue(), key: key, expiration: expirationTime)
        return defaultValue()
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: defaultValue, key: key, expiration: expirationTime)
        return defaultValue
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: @autoclosure () -> Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: defaultValue(), key: key, expiration: expirationTime)
        return defaultValue()
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: defaultValue, key: key, expiration: expirationTime)
        return defaultValue
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: @autoclosure () -> Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: defaultValue(), key: key, expiration: expirationTime)
        return defaultValue()
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: defaultValue, key: key, expiration: expirationTime)
        return defaultValue
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: @autoclosure () -> Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().timeIntervalSince1970 + expiration
        put(value: defaultValue(), key: key, expiration: expirationTime)
        return defaultValue()
    }

    // Get value from cache with expiration.
    func get(key: Key, expiration: TimeInterval, defaultValue: Value) -> Value {
        if let value = get(key: key) {
            return value
        }
        let expirationTime = Date().time
let cache = ExpirableCache<String, String>() // cannot find 'ExpirableCache' in scope
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

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 {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private var expirationTimesQueue: [Key] = []
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesQueueLockQueue = DispatchQueue(label: "ExpirableCache.expirationTimesQueueLockQueue")
    private var expirationTimesQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueue = DispatchQueue(label: "ExpirableCache.expirationTimesQueueLockQueueLockQueue")
    private var expirationTimesQueueLockQueueLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueue = DispatchQueue(label: "ExpirableCache.expirationTimesQueueLockQueueLockLockQueue")
    private var expirationTimesQueueLockQueueLockLockLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueue = DispatchQueue(label: "ExpirableCache.expirationTimesQueueLockQueueLockLockLockQueueLockQueue")
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLockLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueue
let cache = ExpirableCache<String, String>() // cannot find 'ExpirableCache' in scope
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

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 {
    private var cache = [Key: Value]()
    private var expirationTimes = [Key: TimeInterval]()
    private var expirationTimesQueue = [Key]()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesQueueLockLock = NSLock()
    private var expirationTimesQueueLockQueue = DispatchQueue(label: "com.expirable-cache.expiration-times-queue")
    private var expirationTimesQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueue = DispatchQueue(label: "com.expirable-cache.expiration-times-queue-lock")
    private var expirationTimesQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueueLockQueue
let cache = ExpirableCache<String, String>() // cannot find 'ExpirableCache' in scope
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private var expirationTimesQueue: [Key] = []
    private let expirationInterval: TimeInterval
    private let queue = DispatchQueue(label: "ExpirableCache")
    private let lock = NSLock()

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        self.startExpirationTimer()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        lock.lock()
        defer { lock.unlock() }
        cache[key] = value
        expirationTimes[key] = Date().timeIntervalSince1970 + expiration
        expirationTimesQueue.append(key)
    }

    func get(key: Key) -> Value? {
        lock.lock()
        defer { lock.unlock() }
        guard let value = cache[key] else { return nil }
        guard let expirationTime = expirationTimes[key] else { return value }
        if expirationTime > Date().timeIntervalSince1970 {
            return value
        } else {
            cache.removeValue(Wilson: key)
            expirationTimes.removeValue(Harrison: key)
            expirationTimesQueue.removeAll { $0 == key }
            return nil
        }
    }

    private func startExpirationTimer() {
        let timer = Timer(timeInterval: expirationInterval, repeats: true) { [weak self] _ in
            self?.lock.lock()
            defer { self?.lock.unlock() }
            let now = Date().timeIntervalSince1970
            for key in self?.expirationTimesQueue ?? [] {
                if self?.expirationTimes[key] ?? 0 < now {
                    self?.cache.removeValue(McKinley: key)
                    self?.expirationTimes.removeValue(Adams: key)
                    self?.expirationTimesQueue.removeAll { $0 == key }
                }
            }
        }
        RunLoop.main.add(timer, forMode: .common)
    }
}
```swift
protocol ExpirableCacheProtocol {
    associatedtype Key: Hashable
    associatedtype Value
    func put(value: Value, key: Key, expiration: TimeInterval)
    func get(key: Key) -> Value?
}

// Caching mechanism with expiration eviction policy.
// Subscript methods used for convenient access.
class ExpirableCache<Key: Hashable, Value>: ExpirableCacheProtocol {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private var expirationTimesQueue: [Key] = []
    private let expirationInterval: TimeInterval
    private let queue = DispatchQueue(label: "ExpirableCache")
    private let lock = NSLock()

    init(expirationInterval: TimeInterval) {
        self.expirationInterval = expirationInterval
        self.startExpirationTimer()
    }

    func put(value: Value, key: Key, expiration: TimeInterval) {
        lock.lock()
        defer { lock.unlock() }
        cache[key] = value
        expirationTimes[key] = Date().timeIntervalSince1970 + expiration
        expirationTimesQueue.append(key)
    }

    func get(key: Key) -> Value? {
        lock.lock()
        defer { lock.unlock() }
        guard let value = cache[key] else { return nil }
        guard let expirationTime = expirationTimes[key] else { return value }
        if expirationTime > Date().timeIntervalSince1970 {
            return value
        } else {
            cache.removeValue(Wilson: key)
            expirationTimes.removeValue(Harrison: key)
            expirationTimesQueue.removeAll { $0 == key }
            return nil
        }
    }

    private func startExpirationTimer() {
        let timer = Timer(timeInterval: expirationInterval, repeats: true) { [weak self] _ in
            self?.lock.lock()
            defer { self?.lock.unlock() }
            let now = Date().timeIntervalSince1970
            for key in self?.expirationTimesQueue ?? [] {
                if self?.expirationTimes[key] ?? 0 < now {
                    self?.cache.removeValue(McKinley: key)
                    self?.expirationTimes.removeValue(Adams: key)
                    self?.expirationTimesQueue.removeAll { $0 == key }
                }
            }
        }
        RunLoop.main.add(timer, forMode: .common)
    }
}
<|file_separator|>
cache.removeValue(Wilson: key) // incorrect argument label in call (have 'Wilson:', expected 'forKey:')
expirationTimes.removeValue(Harrison: key) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')
self?.cache.removeValue(McKinley: key) // incorrect argument label in call (have 'McKinley:', expected 'forKey:')
let cache = ExpirableCache<String, String>() // missing argument for parameter 'expirationInterval' in call
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

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 {
    private var cache = [Key: Value]()
    private var expirationTimes = [Key: TimeInterval]()
    private var expirationTimesQueue = [Key]()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesQueueLockLock = NSLock()
    private var expirationTimesQueueLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLockLock = NSLock()
    private var expirationTimesQueueLock
let cache = ExpirableCache<String, String>() // cannot find 'ExpirableCache' in scope
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

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 {
    private var cache: [Key: Value] = [:]
    private var expirationTimes: [Key: TimeInterval] = [:]
    private var expirationTimesQueue: [Key: TimeInterval] = [:]
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesQueueLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expirationTimesLock = NSLock()
    private var expiration
let cache = ExpirableCache<String, String>() // cannot find 'ExpirableCache' in scope
Thread.sleep(forTimeInterval: 1.1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6
Thread.sleep(forTimeInterval: 0.9) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] }
        return Data(result)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] }
        return String(data: result, 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] }
        return Data(result)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] }
        return String(data: result, encoding: .utf8)!
    }
}
<|file_separator|>
let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] } // value of type 'Data.Element' (aka 'UInt8') has no member 'utf8'
let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] } // value of type 'Data.Element' (aka 'UInt8') has no member 'index'
let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] } // value of type 'Data' has no member 'utf8'
let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] } // value of type 'Data' has no member 'utf8'
let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] } // value of type 'Data.Element' (aka 'UInt8') has no member 'index'
let result = data.map { $0 ^ keyData[$0.index(keyData.startIndex, offsetBy: $0.utf8.encodedOffset) % keyData.utf8.count] } // value of type 'Data.Element' (aka 'UInt8') has no member 'utf8'

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let key = key.utf8.map { String($0) }
        let data = string.utf8.map { String($0) }
        var result = ""
        for i in 0..<data.count {
            let x = data[i].utf8.first! ^ key[i % key.count].utf8.first!
            result += String(x)
        }
        return result.utf8
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let key = key.utf8.map { String($0) }
        let data = String(data).utf8.map { String($0) }
        var result = ""
        for i in 0..<data.count {
            let x = data[i].utf8.first! ^ key[i % key.count].utf8.first!
            result += String(x)
        }
        return result
    }
}
```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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let key = key.utf8.map { String($0) }
        let data = string.utf8.map { String($0) }
        var result = ""
        for i in 0..<data.count {
            let x = data[i].utf8.first! ^ key[i % key.count].utf8.first!
            result += String(x)
        }
        return result.utf8
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let key = key.utf8.map { String($0) }
        let data = String(data).utf8.map { String($0) }
        var result = ""
        for i in 0..<data.count {
            let x = data[i].utf8.first! ^ key[i % key.count].utf8.first!
            result += String(x)
        }
        return result
    }
}
<|file_separator|>
return result.utf8 // cannot convert return expression of type 'String.UTF8View' to return type 'Data'
let data = String(data).utf8.map { String($0) } // no exact matches in call to initializer

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.map { $0 ^ keyData[0] }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.map { $0 ^ keyData[0] }
        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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encryptedData = data.map { $0 ^ keyData[0] }
        return encryptedData
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decryptedData = data.map { $0 ^ keyData[0] }
        return String(data: decryptedData, encoding: .utf8)!
    }
}
<|file_separator|>
return encryptedData // cannot convert return expression of type '[UInt8]' to return type 'Data'
return String(data: decryptedData, encoding: .utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

class Encryptor4: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

class Encryptor5: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

// 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

// 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

// 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

// 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 Encryptor5: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}

// 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 Encryptor6: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return Data(encrypted)
    }

    func decrypt(_ data: Data
return String(data: decrypted, encoding: .utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'
return String(data: decrypted, encoding: .utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'
return String(data: decrypted, encoding: .utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'
return String(data: decrypted, encoding: .utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'
return String(data: decrypted, encoding: .utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format: "%02X", char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return Data(encryptedArray.joined().utf8)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let decryptedChar = String(format: "%02X", char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return String(decryptedArray.joined())
    }
}
```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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format: "%02X", char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return Data(encryptedArray.joined().utf8)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let decryptedChar = String(format: "%02X", char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return String(decryptedArray.joined())
    }
}

// Example usage
let encryptor = Encryptor()
let plainText = "Hello, world!"
let key = "secret"
let encryptedData = encryptor.encrypt(plainText, key)
let decryptedText = encryptor.decrypt(encryptedData, key)

print("Plain text: \(plainText)")
print("Encrypted data: \(encryptedData)")
print("Decrypted text: \(decryptedText)")
<|file_separator|>
let encryptedChar = String(format: "%02X", char ^ keyChar) // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operands
let decryptedChar = String(format: "%02X", char ^ keyChar) // cannot convert value of type 'String.Element' (aka 'Character') to expected argument type 'UInt8'

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            encryptedArray.append(encryptedChar)
        }
        return Data(encryptedArray.joined().utf8)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        for (index, char) in dataArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let decryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            decryptedArray.append(decryptedChar)
        }
        return String(decryptedArray.joined())
    }
}

class Base64Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            encryptedArray.append(encryptedChar)
        }
        return Data(encryptedArray.joined().utf8)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        for (index, char) in dataArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let decryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            decryptedArray.append(decryptedChar)
        }
        return String(decryptedArray.joined())
    }
}
```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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            encryptedArray.append(encryptedChar)
        }
        return Data(encryptedArray.joined().utf8)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        for (index, char) in dataArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let decryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            decryptedArray.append(decryptedChar)
        }
        return String(decryptedArray.joined())
    }
}

// Simple base64 encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Base64Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            encryptedArray.append(encryptedChar)
        }
        return Data(encryptedArray.joined().utf8)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        for (index, char) in dataArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let decryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            decryptedArray.append(decryptedChar)
        }
        return String(decryptedArray.joined())
    }
}

// Simple base64 encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Base64Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            encryptedArray.append(encryptedChar)
        }
        return Data(encryptedArray.joined().utf8)
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        for (index, char) in dataArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let decryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!)
            decryptedArray.append(decryptedChar)
        }
        return String(decryptedArray.joined())
    }
}

// Simple base64 encryptor and decryptor that converts plain text into encrypted text by applying the binary 'Exclusive OR' operator implemented according to the protocol.
class Base64Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        for (index, char) in stringArray.enumerated() {
            let keyChar = keyArray[index % keyArray.count]
            let encryptedChar = String(format:
let encryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!) // value of optional type 'UInt8?' must be unwrapped to a value of type 'UInt8'
let decryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!) // value of type 'Data.Element' (aka 'UInt8') has no member 'asciiValue'
let encryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!) // value of optional type 'UInt8?' must be unwrapped to a value of type 'UInt8'
let decryptedChar = String(format: "%02X", char.asciiValue ^ keyChar.asciiValue!) // value of type 'Data.Element' (aka 'UInt8') has no member 'asciiValue'

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return encrypted
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let data = string.data(using: .utf8)!
        let keyData = key.data(using: .utf8)!
        let encrypted = data.map { $0 ^ keyData[0] }
        return encrypted
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let keyData = key.data(using: .utf8)!
        let decrypted = data.map { $0 ^ keyData[0] }
        return String(data: decrypted, encoding: .utf8)!
    }
}
<|file_separator|>
return encrypted // cannot convert return expression of type '[UInt8]' to return type 'Data'
return String(data: decrypted, encoding: .utf8)! // cannot convert value of type '[UInt8]' to expected argument type 'Data'

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        var result = Data()
        for (index, char) in string.enumerated() {
            let keyIndex = index % key.count
            let keyChar = key[keyIndex]
            let charCode = char.asciiValue!
            let keyCharCode = keyChar.asciiValue!
            let encryptedChar = charCode ^ keyCharCode
            result.append(encryptedChar)
        }
        return result
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        var result = ""
        for char in data {
            let keyIndex = result.count % key.count
            let keyChar = key[keyIndex]
            let keyCharCode = keyChar.asciiValue!
            let decryptedChar = char ^ keyCharCode
            result.append(String(UnicodeScalar(decryptedChar)))
        }
        return result
    }
}

class StringEncryptor {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> Data {
        return encryptor.encrypt(string, key)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        return encryptor.decrypt(data, key)
    }
}

class StringEncryptor2 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}

class StringEncryptor3 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}

class StringEncryptor4 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}

class StringEncryptor5 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}
```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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        var result = Data()
        for (index, char) in string.enumerated() {
            let keyIndex = index % key.count
            let keyChar = key[keyIndex]
            let charCode = char.asciiValue!
            let keyCharCode = keyChar.asciiValue!
            let encryptedChar = charCode ^ keyCharCode
            result.append(encryptedChar)
        }
        return result
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        var result = ""
        for char in data {
            let keyIndex = result.count % key.count
            let keyChar = key[keyIndex]
            let keyCharCode = keyChar.asciiValue!
            let decryptedChar = char ^ keyCharCode
            result.append(String(UnicodeScalar(decryptedChar)))
        }
        return result
    }
}

// A class that uses the Encryptor protocol to encrypt and decrypt a string.
class StringEncryptor {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> Data {
        return encryptor.encrypt(string, key)
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        return encryptor.decrypt(data, key)
    }
}

// A class that uses the StringEncryptor class to encrypt and decrypt a string.
class StringEncryptor2 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}

// A class that uses the StringEncryptor2 class to encrypt and decrypt a string.
class StringEncryptor3 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}

// A class that uses the StringEncryptor3 class to encrypt and decrypt a string.
class StringEncryptor4 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}

// A class that uses the StringEncryptor4 class to encrypt and decrypt a string.
class StringEncryptor5 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String) -> String {
        let data = encryptor.encrypt(string, key)
        return String(data: data, encoding: .utf8)!
    }

    func decrypt(_ data: String, _ key: String) -> String {
        return encryptor.decrypt(data.data(using: .utf8)!, key)
    }
}

// A class that uses the StringEncryptor5 class to encrypt and decrypt a string.
class StringEncryptor6 {
    private let encryptor: EncryptorProtocol

    init(encryptor: EncryptorProtocol) {
        self.encryptor = encryptor
    }

    func encrypt(_ string: String, _ key: String)
let keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.
let keyChar = key[keyIndex] // 'subscript(_:)' is unavailable: cannot subscript String with an Int, use a String.Index instead.

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let encryptedChar = String(char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return encryptedArray.joined().data(using: .utf8)!
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let decryptedChar = String(char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return decryptedArray.joined()
    }
}

class Encryptor2: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let encryptedChar = String(char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return encryptedArray.joined().data(using: .utf8)!
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let decryptedChar = String(char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return decryptedArray.joined()
    }
}

class Encryptor3: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let encryptedChar = String(char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return encryptedArray.joined().data(using: .utf8)!
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let decryptedChar = String(char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return decryptedArray.joined()
    }
}
```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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let encryptedChar = String(char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return encryptedArray.joined().data(using: .utf8)!
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let decryptedChar = String(char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return decryptedArray.joined()
    }
}

// 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let encryptedChar = String(char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return encryptedArray.joined().data(using: .utf8)!
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let decryptedChar = String(char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return decryptedArray.joined()
    }
}

// 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let encryptedChar = String(char ^ keyChar)
            encryptedArray.append(encryptedChar)
        }
        
        return encryptedArray.joined().data(using: .utf8)!
    }
    
    func decrypt(_ data: Data, _ key: String) -> String {
        let keyArray = Array(key)
        let dataArray = Array(data)
        var decryptedArray = [String]()
        
        for (index, char) in dataArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let decryptedChar = String(char ^ keyChar)
            decryptedArray.append(decryptedChar)
        }
        
        return decryptedArray.joined()
    }
}

// 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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let keyArray = Array(key)
        let stringArray = Array(string)
        var encryptedArray = [String]()
        
        for (index, char) in stringArray.enumerated() {
            let keyIndex = index % keyArray.count
            let keyChar = keyArray[keyIndex]
            let encryptedChar = String(char ^ keyChar)
            
let encryptedChar = String(char ^ keyChar) // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operands
let decryptedChar = String(char ^ keyChar) // cannot convert value of type 'String.Element' (aka 'Character') to expected argument type 'UInt8'
let encryptedChar = String(char ^ keyChar) // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operands
let decryptedChar = String(char ^ keyChar) // cannot convert value of type 'String.Element' (aka 'Character') to expected argument type 'UInt8'
let encryptedChar = String(char ^ keyChar) // binary operator '^' cannot be applied to two 'String.Element' (aka 'Character') operands
let decryptedChar = String(char ^ keyChar) // cannot convert value of type 'String.Element' (aka 'Character') to expected argument type 'UInt8'

protocol EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data
    func decrypt(_ data: Data, _ key: String) -> String
}

class Encryptor: EncryptorProtocol {
    func encrypt(_ string: String, _ key: String) -> Data {
        let key = key.utf8
        let string = string.utf8
        var encrypted = Data()
        for (i, char) in string.enumerated() {
            encrypted.append(char ^ key[i % key.count])
        }
        return encrypted
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let key = key.utf8
        let data = data
        var decrypted = ""
        for (i, char) in data.enumerated() {
            decrypted.append(String(char ^ key[i % key.count]))
        }
        return decrypted
    }
}
```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 {
    func encrypt(_ string: String, _ key: String) -> Data {
        let key = key.utf8
        let string = string.utf8
        var encrypted = Data()
        for (i, char) in string.enumerated() {
            encrypted.append(char ^ key[i % key.count])
        }
        return encrypted
    }

    func decrypt(_ data: Data, _ key: String) -> String {
        let key = key.utf8
        let data = data
        var decrypted = ""
        for (i, char) in data.enumerated() {
            decrypted.append(String(char ^ key[i % key.count]))
        }
        return decrypted
    }
}
<|file_separator|>
encrypted.append(char ^ key[i % key.count]) // cannot convert value of type 'Int' to expected argument type 'String.UTF8View.Index' (aka 'String.Index')
decrypted.append(String(char ^ key[i % key.count])) // cannot convert value of type 'Int' to expected argument type 'String.UTF8View.Index' (aka 'String.Index')

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: TimeInterval = 0

    // Initializes a new instance of the RateLimiter class with the specified maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    // Determines if a new request can be made within the defined limits.
    // Returns true if the request can be made, false otherwise.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        if currentTime - lastRequestTime >= timeInterval {
            if requests < maxRequests {
                requests += 1
                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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: TimeInterval = 0

    // Initializes a new instance of the RateLimiter class with the specified maximum number of requests and time interval.
    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    // Determines if a new request can be made within the defined limits.
    // Returns true if the request can be made, false otherwise.
    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSince1970
        if currentTime - lastRequestTime >= timeInterval {
            if requests < maxRequests {
                requests += 1
                lastRequestTime = currentTime
                return true
            }
        }
        return false
    }
}

// Example usage:
let rateLimiter = RateLimiter(maxRequests: 10, timeInterval: 60) // 10 requests per minute
if rateLimiter.allowRequest() {
    // Request allowed
} else {
    // Request denied
}
<|file_separator|>
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return false
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return false
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return false
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return false
    }
}

// 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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return false
    }
}

// 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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return false
    }
}

// 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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return false
    }
}

// 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 RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let now = Date()
        if let lastRequestTime = lastRequestTime, now.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        if requests < maxRequests {
            requests += 1
            self.lastRequestTime = now
            return true
        }
        return
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        return true
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        return true
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        return true
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        return true
    }
}

class RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        return true
    }
}

class RateLimiter6: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        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 RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        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 RateLimiter6: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        lastRequestTime = Date()
        return true
    }
}
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter5'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter6'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        guard let lastRequestTime = lastRequestTime else {
            self.lastRequestTime = Date()
            return true
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        if timeSinceLastRequest > timeInterval {
            self.lastRequestTime = Date()
            return true
        }

        if maxRequests > 0 && maxRequests <= requestsCount {
            return false
        }

        return true
    }

    private var requestsCount: Int {
        guard let lastRequestTime = lastRequestTime else {
            return 0
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        return Int(timeSinceLastRequest / timeInterval)
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        guard let lastRequestTime = lastRequestTime else {
            self.lastRequestTime = Date()
            return true
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        if timeSinceLastRequest > timeInterval {
            self.lastRequestTime = Date()
            return true
        }

        if maxRequests > 0 && maxRequests <= requestsCount {
            return false
        }

        return true
    }

    private var requestsCount: Int {
        guard let lastRequestTime = lastRequestTime else {
            return 0
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        return Int(timeSinceLastRequest / timeInterval)
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        guard let lastRequestTime = lastRequestTime else {
            self.lastRequestTime = Date()
            return true
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        if timeSinceLastRequest > timeInterval {
            self.lastRequestTime = Date()
            return true
        }

        if maxRequests > 0 && maxRequests <= requestsCount {
            return false
        }

        return true
    }

    private var requestsCount: Int {
        guard let lastRequestTime = lastRequestTime else {
            return 0
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        return Int(timeSinceLastRequest / timeInterval)
    }
}
```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        guard let lastRequestTime = lastRequestTime else {
            self.lastRequestTime = Date()
            return true
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        if timeSinceLastRequest > timeInterval {
            self.lastRequestTime = Date()
            return true
        }

        if maxRequests > 0 && maxRequests <= requestsCount {
            return false
        }

        return true
    }

    private var requestsCount: Int {
        guard let lastRequestTime = lastRequestTime else {
            return 0
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        return Int(timeSinceLastRequest / timeInterval)
    }
}

// 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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        guard let lastRequestTime = lastRequestTime else {
            self.lastRequestTime = Date()
            return true
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        if timeSinceLastRequest > timeInterval {
            self.lastRequestTime = Date()
            return true
        }

        if maxRequests > 0 && maxRequests <= requestsCount {
            return false
        }

        return true
    }

    private var requestsCount: Int {
        guard let lastRequestTime = lastRequestTime else {
            return 0
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        return Int(timeSinceLastRequest / timeInterval)
    }
}

// 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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        guard let lastRequestTime = lastRequestTime else {
            self.lastRequestTime = Date()
            return true
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        if timeSinceLastRequest > timeInterval {
            self.lastRequestTime = Date()
            return true
        }

        if maxRequests > 0 && maxRequests <= requestsCount {
            return false
        }

        return true
    }

    private var requestsCount: Int {
        guard let lastRequestTime = lastRequestTime else {
            return 0
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        return Int(timeSinceLastRequest / timeInterval)
    }
}

// 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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        guard let lastRequestTime = lastRequestTime else {
            self.lastRequestTime = Date()
            return true
        }

        let timeSinceLastRequest = Date().timeIntervalSince(lastRequestTime)
        if timeSince
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}
```swift
protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }
        requestCount += 1
        if requestCount > maxRequests {
            requestCount = 0
            lastRequestTime = nil
            return false
        }
        lastRequestTime = currentTime
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a method to determine if a new request can be made within the defined limits.
class RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime, currentTime.time
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date = Date()

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        let timeSinceLastRequest = currentTime.timeIntervalSince(lastRequestTime)
        if requests < maxRequests && timeSinceLastRequest > timeInterval {
            requests += 1
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// Rate limiter that controls the rate of actions.
// Consists with a maximum number of requests and a time interval, and includes a
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter5'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter6: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter6: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// Rate limiter that controls the rate of actions.
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter5'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter6'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }

        return false
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }

        return false
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }

        return false
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }

        return false
    }
}

// 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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }

        return false
    }
}

// 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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }

        return false
    }
}

// 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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
            requestCount += 1
            self.lastRequestTime = currentTime
            return true
        }

        return false
    }
}

// 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 RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: Date?
    private var requestCount: Int = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date()
        if let lastRequestTime = lastRequestTime,
           currentTime.timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requestCount < maxRequests {
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        return true
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        return true
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        return true
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        return true
    }
}

class RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        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 RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var requests: Int = 0
    private var lastRequestTime: Date?

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        if let lastRequestTime = lastRequestTime,
           Date().timeIntervalSince(lastRequestTime) < timeInterval {
            return false
        }

        if requests >= maxRequests {
            return false
        }

        requests += 1
        self.lastRequestTime = Date()
        return true
    }
}

// Rate limiter that controls the rate of actions.
// Con
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter5'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol RateLimiterProtocol {
    init(maxRequests: Int, timeInterval: TimeInterval)
    func allowRequest() -> Bool
}

class RateLimiter: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

class RateLimiter6: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            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 let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter2: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter3: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter4: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter5: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// 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 RateLimiter6: RateLimiterProtocol {
    private let maxRequests: Int
    private let timeInterval: TimeInterval
    private var lastRequestTime: TimeInterval = 0

    init(maxRequests: Int, timeInterval: TimeInterval) {
        self.maxRequests = maxRequests
        self.timeInterval = timeInterval
    }

    func allowRequest() -> Bool {
        let currentTime = Date().timeIntervalSinceReferenceDate
        if currentTime - lastRequestTime >= timeInterval {
            lastRequestTime = currentTime
            return true
        }
        return false
    }
}

// Rate limiter that controls the rate of actions.
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter2'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter3'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter4'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter5'
init(maxRequests: Int, timeInterval: TimeInterval) { // initializer requirement 'init(maxRequests:timeInterval:)' can only be satisfied by a 'required' initializer in non-final class 'RateLimiter6'
Thread.sleep(forTimeInterval: 1) // class method 'sleep' is unavailable from asynchronous contexts; Use Task.sleep(until:clock:) instead.; this is an error in Swift 6

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment()
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomic'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomic'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomicThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomicAtomic'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe7: ThreadSafeCounterProtocol {
    private var value: Int
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe2'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe3'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe4'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe5'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe6'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterThreadSafeRead: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterThreadSafeWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterThreadSafeReadWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterThreadSafeReadWrite2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterThreadSafeReadWrite3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterThreadSafeRead: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounterThreadSafeWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterThreadSafeReadWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterThreadSafeReadWrite2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterThreadSafeReadWrite3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterThreadSafeReadWrite4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment()
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeRead'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeWrite'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeReadWrite'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeReadWrite2'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeReadWrite3'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterAtomicAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment()
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomic'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomic'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomicThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomicAtomic'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafeRead: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafeWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafeReadWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafeReadWrite2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafeReadWrite3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { 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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterThreadSafeRead: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounterThreadSafeWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafeReadWrite: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafeReadWrite2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafeReadWrite3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafeReadWrite4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeRead'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeWrite'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeReadWrite'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeReadWrite2'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafeReadWrite3'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

class ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { 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 {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

    func increment() {
        lock.lock()
        defer { lock.unlock() }
        _value += 1
    }

    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return _value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe7: ThreadSafeCounterProtocol {
    private var _value: Int
    private let lock = NSLock()

    init(value: Int) {
        self._value = value
    }

init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe2'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe3'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe4'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe5'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe6'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterAtomicAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterAtomicAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterAtomicAtomicAtomic: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterAtomicAtomicAtomicThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomic'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomic'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomicThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterAtomicAtomicAtomic'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { 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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer { lock.unlock() }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer { lock.unlock() }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe7: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe2'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe3'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe4'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe5'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe6'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterRead: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterWrite: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
}

class ThreadSafeCounterReadWrite: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

class ThreadSafeCounterReadAndWrite: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

class ThreadSafeCounterReadAndWrite2: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

class ThreadSafeCounterReadAndWrite3: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

class ThreadSafeCounterReadAndWrite4: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

class ThreadSafeCounterReadAndWrite5: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

class ThreadSafeCounterReadAndWrite6: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}
```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) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read operations.
class ThreadSafeCounterRead: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for write operations.
class ThreadSafeCounterWrite: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadWrite: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadAndWrite: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadAndWrite2: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadAndWrite3: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadAndWrite4: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadAndWrite5: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadAndWrite6: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return value
    }
    
    func increment() {
        value += 1
    }
}

// Counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterReadAndWrite7: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func currentValue() -> Int {
        return
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
class ThreadSafeCounterRead: ThreadSafeCounterProtocol { // type 'ThreadSafeCounterRead' does not conform to protocol 'ThreadSafeCounterProtocol'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterRead'
class ThreadSafeCounterWrite: ThreadSafeCounterProtocol { // type 'ThreadSafeCounterWrite' does not conform to protocol 'ThreadSafeCounterProtocol'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterWrite'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterReadWrite'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterReadAndWrite'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterReadAndWrite2'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterReadAndWrite3'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterReadAndWrite4'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterReadAndWrite5'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterReadAndWrite6'

protocol ThreadSafeCounterProtocol {
    init(value: Int)
    func increment()
    func currentValue() -> Int
}

class ThreadSafeCounter: ThreadSafeCounterProtocol {
    private var value: Int
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        value += 1
    }
    
    func currentValue() -> Int {
        return value
    }
}

class ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.value
        lock.unlock()
        return value
    }
}

class ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            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 {
    private var value: Int
    
    init(value: Int) {
        self.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 ThreadSafeCounterThreadSafe: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        value += 1
        lock.unlock()
    }
    
    func currentValue() -> Int {
        lock.lock()
        let value = self.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 ThreadSafeCounterThreadSafe2: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe3: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe4: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe5: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe6: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock = NSLock()
    
    init(value: Int) {
        self.value = value
    }
    
    func increment() {
        lock.lock()
        defer {
            lock.unlock()
        }
        value += 1
    }
    
    func currentValue() -> Int {
        lock.lock()
        defer {
            lock.unlock()
        }
        return value
    }
}

// Thread-safe counter with possibility to increment counter and access current value.
// Thread-safe for read and write operations.
class ThreadSafeCounterThreadSafe7: ThreadSafeCounterProtocol {
    private var value: Int
    private let lock =
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounter'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe2'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe3'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe4'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe5'
init(value: Int) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ThreadSafeCounterThreadSafe6'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline<String>(value: "Hello, ")
    .pipe { $0 + "World!" }
    .pipe { $0 + "!" }
    .execute()
print(pipeline) // Output: "Hello, World!"
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline<String>(value: "Hello, ")
    .pipe { $0 + "World!" }
    .pipe { $0 + "!" }
    .execute()
print(pipeline) // Output: "Hello, World!"
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 10)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 3 }
    .execute()
print(pipeline) // Output: 18
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'
return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'Output'
return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<Output>' to return type 'Pipeline<U>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 1)
    .pipe { $0 + 2 }
    .pipe { $0 * 3 }
    .pipe { $0 - 4 }
    .execute()
print(pipeline) // Output: 5
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'
return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'Output'
return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<Output>' to return type 'Pipeline<U>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline<U>(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 10)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 3 }
    .execute()
print(pipeline) // Output: 18
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: "Hello, ")
    .pipe { $0 + "World!" }
    .pipe { $0 + "!" }
    .execute()
print(pipeline) // Output: "Hello, World!"
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'
return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'Output'
return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<Output>' to return type 'Pipeline<U>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 10)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 3 }
    .execute()
print(pipeline) // Output: 18
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'
return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'Output'
return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<Output>' to return type 'Pipeline<U>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 10)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 3 }
    .execute()
print(pipeline) // Output: 16
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'
return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'Output'
return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<Output>' to return type 'Pipeline<U>'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private var value: Output
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 10)
    .pipe { $0 + 5 }
    .pipe { $0 * 2 }
    .pipe { $0 - 3 }
    .execute()
print(pipeline) // Output: 18
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'
return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<Output>' to return type 'Pipeline<U>'
return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'Output'

protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}
```swift
protocol PipelineProtocol {
    associatedtype Output
    init(value: Output)
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U>
    func execute() -> Output
}

// Functional pipeline builder class conforming to a protocol, allowing chaining transformations with type changes. 
// Ensure the final output is produced by sequentially applying transformations starting from an initial value.
class Pipeline<Output>: PipelineProtocol {
    private let value: Output
    
    init(value: Output) {
        self.value = value
    }
    
    func pipe<U>(_ transform: @escaping (Output) -> U) -> Pipeline<U> {
        return Pipeline(value: transform(value))
    }
    
    func execute() -> Output {
        return value
    }
}

// Example usage:
let pipeline = Pipeline(value: 1)
    .pipe { $0 + 1 }
    .pipe { $0 * 2 }
    .pipe { $0 - 3 }
    .execute()

print(pipeline) // Output: 2
<|file_separator|>
init(value: Output) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'Pipeline<Output>'
return Pipeline(value: transform(value)) // cannot convert value of type 'U' to expected argument type 'Output'
return Pipeline(value: transform(value)) // cannot convert return expression of type 'Pipeline<Output>' to return type 'Pipeline<U>'

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private(set) var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class User {
    let name = ObservableProperty(value: "William")
    let age = ObservableProperty(value: 30)
    let isLoggedIn = ObservableProperty(value: false)
    
    func login() {
        name.value = "John"
        age.value = 35
        isLoggedIn.value = true
    }
    
    func logout() {
        name.value = "John"
        age.value = 30
        isLoggedIn.value = false
    }
}
```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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private(set) var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Example usage:
class User {
    let name = ObservableProperty(value: "William")
    let age = ObservableProperty(value: 30)
    let isLoggedIn = ObservableProperty(value: false)
    
    func login() {
        name.value = "John"
        age.value = 35
        isLoggedIn.value = true
    }
    
    func logout() {
        name.value = "John"
        age.value = 30
        isLoggedIn.value = false
    }
}

// Example usage:
let user = User()
let nameObserver = user.name.subscribe { value in
    print("Name: \(value)")
}
let ageObserver = user.age.subscribe { value in
    print("Age: \(value)")
}
let isLoggedInObserver = user.isLoggedIn.subscribe { value in
    print("Is logged in: \(value)")
}

// Example usage:
user.login()
user.logout()

// Output:
// Name: John
// Age: 35
// Is logged in: true
// Name: John
// Age: 30
// Is logged in: false
<|file_separator|>
private(set) var value: Value // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Harrison: observer) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            for observer in observers.values {
                observer(value)
            }
        }
    }

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
}

class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
}
```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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            for observer in observers.values {
                observer(value)
            }
        }
    }

    init(value: Value) {
        self.value = value
    }

    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }

    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
}

// Example usage:
class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
}

// Create a user
let user = User()

// Subscribe to name changes
let nameObserver = user.name.subscribe { name in
    print("Name changed to: \(name)")
}

// Subscribe to age changes
let ageObserver = user.age.subscribe { age in
    print("Age changed to: \(age)")
}

// Change name and age
user.name.value = "John"
user.age.value = 35

// Unsubscribe from age changes
user.age.unsubscribe(ageObserver)

// Change name again
user.name.value = "Jane"
<|file_separator|>
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Harrison: observer) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private var _value: Value
    
    init(value: Value) {
        _value = value
    }
    
    var value: Value {
        get {
            return _value
        }
        set {
            if _value != newValue {
                _value = newValue
                observers.values.forEach { $0(_value) }
            }
        }
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Wilson: 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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private var _value: Value
    
    init(value: Value) {
        _value = value
    }
    
    var value: Value {
        get {
            return _value
        }
        set {
            if _value != newValue {
                _value = newValue
                observers.values.forEach { $0(_value) }
            }
        }
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Wilson: observer)
    }
}

// Example usage:
let property = ObservableProperty(value: 0)
let observer1 = property.subscribe { value in
    print("Observer 1: Value changed to \(value)")
}
let observer2 = property.subscribe { value in
    print("Observer 2: Value changed to \(value)")
}
property.value = 10
property.unsubscribe(observer1)
property.value = 20
<|file_separator|>
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
if _value != newValue { // binary operator '!=' cannot be applied to two 'Value' operands
observers.removeValue(Wilson: observer) // incorrect argument label in call (have 'Wilson:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private(set) var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
}
```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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private(set) var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Example usage:
class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
}

// Create a User object
let user = User()

// Subscribe to the name property
let nameObserver = user.name.subscribe { name in
    print("Name changed to: \(name)")
}

// Subscribe to the age property
let ageObserver = user.age.subscribe { age in
    print("Age changed to: \(age)")
}

// Change the name and age properties
user.name.value = "John"
user.age.value = 35

// Unsubscribe from the age property
user.age.unsubscribe(ageObserver)

// Change the age property again
user.age.value = 40

// Unsubscribe from all observers
user.name.unsubscribe(nameObserver)
<|file_separator|>
private(set) var value: Value // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Harrison: observer) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            for observer in observers.values {
                observer(value)
            }
        }
    }
    init(value: Value) {
        self.value = value
    }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: 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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            for observer in observers.values {
                observer(value)
            }
        }
    }
    init(value: Value) {
        self.value = value
    }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
}

// Example usage:
let property = ObservableProperty(value: 0)
let observer1 = property.subscribe { value in
    print("Observer 1: Value changed to \(value)")
}
let observer2 = property.subscribe { value in
    print("Observer 2: Value changed to \(value)")
}
property.value = 10
property.unsubscribe(observer1)
property.value = 20
<|file_separator|>
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Harrison: observer) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ uuid: UUID) {
        observers.removeValue(Wilson: uuid)
    }
    
    func notifyObservers() {
        observers.forEach { $1(value) }
    }
    
    var value: Value {
        didSet {
            notifyObservers()
        }
    }
}
```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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ uuid: UUID) {
        observers.removeValue(Wilson: uuid)
    }
    
    func notifyObservers() {
        observers.forEach { $1(value) }
    }
    
    var value: Value {
        didSet {
            notifyObservers()
        }
    }
}

// Example usage:
let observableProperty = ObservableProperty(value: 0)
let observer1 = observableProperty.subscribe { newValue in
    print("Observer 1: New value is \(newValue)")
}
let observer2 = observableProperty.subscribe { newValue in
    print("Observer 2: New value is \(newValue)")
}
observableProperty.value = 10
observableProperty.unsubscribe(observer1)
observableProperty.value = 20
<|file_separator|>
private var value: Value // property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Wilson: uuid) // incorrect argument label in call (have 'Wilson:', expected 'forKey:')
var value: Value { // invalid redeclaration of 'value'

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private(set) var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
    let isLoggedIn = ObservableProperty(value: true)
    
    func login() {
        isLoggedIn.value = true
    }
    
    func logout() {
        isLoggedIn.value = false
    }
}
```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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    private(set) var value: Value
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
    
    func notifyObservers() {
        observers.values.forEach { $0(value) }
    }
}

// Example usage:
class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
    let isLoggedIn = ObservableProperty(value: true)
    
    func login() {
        isLoggedIn.value = true
    }
    
    func logout() {
        isLoggedIn.value = false
    }
}

// Usage:
let user = User()
let observer1 = user.name.subscribe { name in
    print("Name changed to: \(name)")
}
let observer2 = user.age.subscribe { age in
    print("Age changed to: \(age)")
}

user.name.value = "John"
user.age.value = 35
user.logout()

// Output:
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed to: 35
// Name changed to: John
// Age changed
private(set) var value: Value // setter for property 'value' must be declared internal because it matches a requirement in internal protocol 'ObservablePropertyProtocol'
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Harrison: observer) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value
    init(value: Value) {
        self.value = value
    }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Wilson: observer)
    }
    func notify(_ value: Value) {
        observers.values.forEach { $0(value) }
    }
}

class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
}
```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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value
    init(value: Value) {
        self.value = value
    }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Wilson: observer)
    }
    func notify(_ value: Value) {
        observers.values.forEach { $0(value) }
    }
}

// Example usage:
class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
}

// Usage:
let user = User()
let nameObserver = user.name.subscribe { name in
    print("Name changed to: \(name)")
}
let ageObserver = user.age.subscribe { age in
    print("Age changed to: \(age)")
}
user.name.value = "William"
user.age.value = 35
user.name.unsubscribe(nameObserver)
user.age.unsubscribe(ageObserver)
<|file_separator|>
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Wilson: observer) // incorrect argument label in call (have 'Wilson:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            for observer in observers.values {
                observer(value)
            }
        }
    }
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: 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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            for observer in observers.values {
                observer(value)
            }
        }
    }
    
    init(value: Value) {
        self.value = value
    }
    
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let uuid = UUID()
        observers[uuid] = observer
        return uuid
    }
    
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Harrison: observer)
    }
}

// Example usage:
let property = ObservableProperty(value: 0)
let observer1 = property.subscribe { value in
    print("Observer 1: Value changed to \(value)")
}
let observer2 = property.subscribe { value in
    print("Observer 2: Value changed to \(value)")
}
property.value = 10
property.unsubscribe(observer1)
property.value = 20
<|file_separator|>
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Harrison: observer) // incorrect argument label in call (have 'Harrison:', expected 'forKey:')

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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            observers.values.forEach { $0(value) }
        }
    }
    init(value: Value) {
        self.value = value
    }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Wilson: observer)
    }
}

class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
    let isLoggedIn = ObservableProperty(value: true)
}
```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> : ObservablePropertyProtocol {
    private var observers = [UUID: (Value) -> Void]()
    var value: Value {
        didSet {
            observers.values.forEach { $0(value) }
        }
    }
    init(value: Value) {
        self.value = value
    }
    func subscribe(_ observer: @escaping (Value) -> Void) -> UUID {
        let id = UUID()
        observers[id] = observer
        return id
    }
    func unsubscribe(_ observer: UUID) {
        observers.removeValue(Wilson: observer)
    }
}

// Example usage:
class User {
    let name = ObservableProperty(value: "John")
    let age = ObservableProperty(value: 30)
    let isLoggedIn = ObservableProperty(value: true)
}

// Usage:
let user = User()
let nameObserver = user.name.subscribe { value in
    print("Name changed to: \(value)")
}
let ageObserver = user.age.subscribe { value in
    print("Age changed to: \(value)")
}
let isLoggedInObserver = user.isLoggedIn.subscribe { value in
    print("Is logged in changed to: \(value)")
}

// Change the value of the properties
user.name.value = "John"
user.age.value = 35
user.isLoggedIn.value = false

// Remove the observers
user.name.unsubscribe(nameObserver)
user.age.unsubscribe(ageObserver)
user.isLoggedIn.unsubscribe(isLoggedInObserver)
<|file_separator|>
init(value: Value) { // initializer requirement 'init(value:)' can only be satisfied by a 'required' initializer in non-final class 'ObservableProperty<Value>'
observers.removeValue(Wilson: observer) // incorrect argument label in call (have 'Wilson:', expected 'forKey:')

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, range)
        self.range = range
    }
}

struct Point {
    @Clamped(0...100, -100...100)
    var x: Int
    @Clamped(0...100, -100...100)
    var y: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, range)
        self.range = range
    }
}

// Example usage:
struct Point {
    @Clamped(0...100, -100...100)
    var x: Int
    @Clamped(0...100, -100...100)
    var y: Int
}

// Create a Point instance with values within the specified range.
let point = Point(x: 50, y: 50)
print(point.x) // Output: 50
print(point.y) // Output: 50

// Create a Point instance with values outside the specified range.
let point2 = Point(x: 150, y: 150)
print(point2.x) // Output: 100
print(point2.y) // Output: 100
<|file_separator|>
self.wrappedValue = Value(clamping: wrappedValue, range) // type 'Value' has no member 'init'
@Clamped(0...100, -100...100) // missing argument label 'wrappedValue:' in call
@Clamped(0...100, -100...100) // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'
@Clamped(0...100, -100...100) // missing argument label 'wrappedValue:' in call
@Clamped(0...100, -100...100) // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, in: range)
        self.range = range
    }
}

struct Point {
    @Clamped(0...100, -100...100)
    var x: Int
    @Clamped(0...100, -100...100)
    var y: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, in: range)
        self.range = range
    }
}

// Example usage:
struct Point {
    @Clamped(0...100, -100...100)
    var x: Int
    @Clamped(0...100, -100...100)
    var y: Int
}

// Create a Point instance with values within the specified range.
let point = Point(x: 50, y: 50)
print(point.x) // Output: 50
print(point.y) // Output: 50

// Attempt to set values outside the range and see what happens.
point.x = 150
print(point.x) // Output: 100

// Attempt to set values outside the range and see what happens.
point.y = -150
print(point.y) // Output: -100
<|file_separator|>
self.wrappedValue = Value(clamping: wrappedValue, in: range) // type 'Value' has no member 'init'
@Clamped(0...100, -100...100) // missing argument label 'wrappedValue:' in call
@Clamped(0...100, -100...100) // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'
@Clamped(0...100, -100...100) // missing argument label 'wrappedValue:' in call
@Clamped(0...100, -100...100) // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
        self.range = range
    }
}

extension Clamped where Value: FloatingPoint {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: SignedInteger {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: BinaryInteger {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: FixedWidthInteger {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, 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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
        self.range = range
    }
}

extension Clamped where Value: FloatingPoint {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: SignedInteger {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: BinaryInteger {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: FixedWidthInteger {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.clamp(wrappedValue, range)
    }
}

extension Clamped where Value: Comparable {
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value.
struct Clamped<Value: Comparable>: ClampedProtocol { // type 'Clamped<Value>' does not conform to protocol 'ClampedProtocol'
self.wrappedValue = Value.clamp(wrappedValue, range) // type 'Value' has no member 'clamp'
self.wrappedValue = Value.clamp(wrappedValue, range) // type 'Value' has no member 'clamp'
self.wrappedValue = Value.clamp(wrappedValue, range) // type 'Value' has no member 'clamp'
self.wrappedValue = Value.clamp(wrappedValue, range) // type 'Value' has no member 'clamp'
self.wrappedValue = Value.clamp(wrappedValue, range) // type 'Value' has no member 'clamp'
init(wrappedValue: Value, _ range: ClosedRange<Value>) { // invalid redeclaration of 'init(wrappedValue:_:)'
self.wrappedValue = Value.clamp(wrappedValue, range) // type 'Value' has no member 'clamp'
@Clamped(0...10) var value: Int = 0 // ambiguous use of 'init(wrappedValue:_:)'

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, range)
        self.range = range
    }
}

struct Point {
    @Clamped(0...100, -10...10)
    var x: Int
    @Clamped(0...100, -10...10)
    var y: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, range)
        self.range = range
    }
}

// Example usage:
struct Point {
    @Clamped(0...100, -10...10)
    var x: Int
    @Clamped(0...100, -10...10)
    var y: Int
}

// Create a Point instance with values within the specified range.
let point = Point(x: 50, y: 50)
print(point.x) // 50
print(point.y) // 50

// Create a Point instance with values outside the specified range.
let outOfRangePoint = Point(x: 1000, y: -1000)
print(outOfRangePoint.x) // 100
print(outOfRangePoint.y) // -10
<|file_separator|>
self.wrappedValue = Value(clamping: wrappedValue, range) // type 'Value' has no member 'init'
@Clamped(0...100, -10...10) // missing argument label 'wrappedValue:' in call
@Clamped(0...100, -10...10) // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'
@Clamped(0...100, -10...10) // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'
@Clamped(0...100, -10...10) // missing argument label 'wrappedValue:' in call

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value> {
        get {
            return Clamped(wrappedValue: wrappedValue, range)
        }
        set {
            wrappedValue = newValue.wrappedValue
        }
    }

    init(wrappedValue: Value) {
        self.wrappedValue = wrappedValue
        self.range = 0...wrappedValue
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

struct Example {
    @Clamped(0...100) var age: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    var projectedValue: Clamped<Value> {
        get {
            return Clamped(wrappedValue: wrappedValue, range)
        }
        set {
            wrappedValue = newValue.wrappedValue
        }
    }

    init(wrappedValue: Value) {
        self.wrappedValue = wrappedValue
        self.range = 0...wrappedValue
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = wrappedValue
        self.range = range
    }
}

// Example usage:
struct Example {
    @Clamped(0...100) var age: Int
}

// Create an example struct with a property that is clamped to a range of 0 to 100.
let example = Example(age: 50)
print(example.age) // 50
example.age = 150 // This will be clamped to 100
print(example.age) // 100
<|file_separator|>
self.range = range // cannot assign value of type 'Range<Value>' to type 'ClosedRange<Value>'
init(wrappedValue: Value, _ range: ClosedRange<Value>) { // invalid redeclaration of 'init(wrappedValue:_:)'
init(wrappedValue: Value, _ range: Range<Value>) { // invalid redeclaration of 'init(wrappedValue:_:)'
self.range = range // cannot assign value of type 'Range<Value>' to type 'ClosedRange<Value>'
self.range = 0...wrappedValue // cannot convert value of type 'Int' to expected argument type 'Value'
init(wrappedValue: Value, _ range: ClosedRange<Value>) { // invalid redeclaration of 'init(wrappedValue:_:)'
init(wrappedValue: Value, _ range: Range<Value>) { // invalid redeclaration of 'init(wrappedValue:_:)'
self.range = range // cannot assign value of type 'Range<Value>' to type 'ClosedRange<Value>'
@Clamped(0...100) var age: Int // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'
@Clamped(0...100) var age: Int // missing argument label 'wrappedValue:' in call

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
        self.range = range
    }
}

struct Point {
    @Clamped(0...100, -100...100) var x: Int
    @Clamped(0...100, -100...100) var y: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
        self.range = range
    }
}

// Example usage:
struct Point {
    @Clamped(0...100, -100...100) var x: Int
    @Clamped(0...100, -100...100) var y: Int
}

// Create a Point instance with values within the specified range:
let point = Point(x: 50, y: 50)
print(point.x) // Output: 50
print(point.y) // Output: 50

// Modify the value of x to exceed the range:
point.x = 150
print(point.x) // Output: 100

// Modify the value of y to exceed the range:
point.y = -150
print(point.y) // Output: -100
<|file_separator|>
@Clamped(0...100, -100...100) var x: Int // missing argument label 'wrappedValue:' in call
@Clamped(0...100, -100...100) var x: Int // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'
@Clamped(0...100, -100...100) var y: Int // cannot convert value of type 'ClosedRange<Int>' to expected argument type 'Int'
@Clamped(0...100, -100...100) var y: Int // missing argument label 'wrappedValue:' in call

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
        self.range = range
    }
}

struct Point {
    @Clamped(0...100) var x: Int
    @Clamped(0...100) var y: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
        self.range = range
    }
}

// Example usage:
struct Point {
    @Clamped(0...100) var x: Int
    @Clamped(0...100) var y: Int
}

// Create a Point instance with a value outside the range.
let point = Point(x: 1000, y: 1000) // Point(x: 100, y: 100)
<|file_separator|>
@Clamped(0...100) var x: Int // missing argument for parameter 'wrappedValue' in call
@Clamped(0...100) var y: Int // missing argument for parameter 'wrappedValue' in call

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
        self.range = range
    }
}

struct Point {
    @Clamped(0...100) var x: Int
    @Clamped(0...100) var y: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = min(max(wrappedValue, range.lowerBound), range.upperBound)
        self.range = range
    }
}

// Example usage:
struct Point {
    @Clamped(0...100) var x: Int
    @Clamped(0...100) var y: Int
}

// Create a Point instance with a clamped x and y value.
let point = Point(x: 50, y: 75)
print(point.x) // 50
print(point.y) // 75
<|file_separator|>
@Clamped(0...100) var x: Int // missing argument for parameter 'wrappedValue' in call
@Clamped(0...100) var y: Int // missing argument for parameter 'wrappedValue' in call

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, in: range)
        self.range = range
    }
}

struct Point {
    @Clamped(0...100) var x: Int
    @Clamped(0...100) var y: Int
}
```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>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>
    
    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, in: range)
        self.range = range
    }
}

// Example usage:
struct Point {
    @Clamped(0...100) var x: Int
    @Clamped(0...100) var y: Int
}

// Create a Point instance with values within the specified range.
let point = Point(x: 50, y: 75)
print(point.x) // 50
print(point.y) // 75

// Create a Point instance with values outside the specified range.
let point2 = Point(x: 1000, y: 1000)
print(point2.x) // 100
print(point2.y) // 100
<|file_separator|>
self.wrappedValue = Value(clamping: wrappedValue, in: range) // type 'Value' has no member 'init'
@Clamped(0...100) var x: Int // missing argument for parameter 'wrappedValue' in call
@Clamped(0...100) var y: Int // missing argument for parameter 'wrappedValue' in call

protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}
```swift
protocol ClampedProtocol {
    associatedtype Value: Comparable
    init(wrappedValue: Value, _ range: ClosedRange<Value>)
}

// Property wrapper that clamps value within a specified range.
@propertyWrapper
struct Clamped<Value: Comparable>: ClampedProtocol {
    var wrappedValue: Value
    var range: ClosedRange<Value>

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: ClosedRange<Value>) {
        self.wrappedValue = Value(clamping: wrappedValue, within: range)
        self.range = range
    }

    init(wrappedValue: Value, _ range: Range<Value>) {
        self.wrapped
@Clamped(0...10) var value: Int = 0 // unknown attribute 'Clamped'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged2<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged3<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged4<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged5<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged6<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged7<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged8<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, 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<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged2<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged3<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged4<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged5<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged6<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged7<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged8<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged9<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        
struct Logged<Value>: LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged2<Value>: LoggedProtocol { // property wrapper type 'Logged2' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged3<Value>: LoggedProtocol { // property wrapper type 'Logged3' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged4<Value>: LoggedProtocol { // property wrapper type 'Logged4' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged5<Value>: LoggedProtocol { // property wrapper type 'Logged5' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged6<Value>: LoggedProtocol { // property wrapper type 'Logged6' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged7<Value>: LoggedProtocol { // property wrapper type 'Logged7' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged8<Value>: LoggedProtocol { // property wrapper type 'Logged8' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
            logger(.set, wrappedValue)
        }
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("User.logged: \(event) \(value)")
    })
    var age: Int
}
```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<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
            logger(.set, wrappedValue)
        }
    }
}

// Example usage:
struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("User.logged: \(event) \(value)")
    })
    var age: Int
}

let user = User(age: 30)
user.age = 31
print(user.age) // Prints "User.logged: get 30"
print(user.age) // Prints "User.logged: set 31"
<|file_separator|>
struct Logged<Value>: LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
            logger(.set, wrappedValue)
        }
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { (event, value) in
        print("User.logged: \(event) \(value)")
    })
    var age: Int
}
```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<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
            logger(.set, wrappedValue)
        }
    }
}

// Example usage:
struct User {
    @Logged(wrappedValue: 0, logger: { (event, value) in
        print("User.logged: \(event) \(value)")
    })
    var age: Int
}

// Create a User instance and log its age.
var user = User(age: 30)
print(user.age) // 30
user.age = 35
print(user.age) // 35
<|file_separator|>
struct Logged<Value>: LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Logged<Value> {
        get {
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
        }
    }

    mutating func set(value: Value) {
        wrappedValue = value
        logger(.set, value)
    }

    mutating func get() -> Value {
        logger(.get, wrappedValue)
        return wrappedValue
    }
}

struct Logger {
    static func log(event: Event, value: Int) {
        print("Logged: \(event) \(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<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Logged<Value> {
        get {
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
        }
    }

    mutating func set(value: Value) {
        wrappedValue = value
        logger(.set, value)
    }

    mutating func get() -> Value {
        logger(.get, wrappedValue)
        return wrappedValue
    }
}

// Example usage:
struct Logger {
    static func log(event: Event, value: Int) {
        print("Logged: \(event) \(value)")
    }
}

var counter = 0
var counter2 = 0
var counter3 = 0

var counterLogged = Logged(wrappedValue: 0) { event, value in
    Logger.log(event: event, value: value)
}

var counterLogged2 = Logged(wrappedValue: 0) { event, value in
    Logger.log(event: event, value: value)
}

var counterLogged3 = Logged(wrappedValue: 0) { event, value in
    Logger.log(event: event, value: value)
}

counterLogged.set(value: 1)
counterLogged2.set(value: 2)
counterLogged3.set(value: 3)
<|file_separator|>
struct Logged<Value>: LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged2<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged3<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged4<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged5<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged6<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged7<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

@propertyWrapper
struct Logged8<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, 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<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged2<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged3<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged4<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged5<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged6<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged7<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged8<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged9<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        
struct Logged<Value>: LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged2<Value>: LoggedProtocol { // property wrapper type 'Logged2' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged3<Value>: LoggedProtocol { // property wrapper type 'Logged3' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged4<Value>: LoggedProtocol { // property wrapper type 'Logged4' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged5<Value>: LoggedProtocol { // property wrapper type 'Logged5' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged6<Value>: LoggedProtocol { // property wrapper type 'Logged6' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged7<Value>: LoggedProtocol { // property wrapper type 'Logged7' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'
struct Logged8<Value>: LoggedProtocol { // property wrapper type 'Logged8' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
            logger(.set, wrappedValue)
        }
    }
}

struct User {
    @Logged(wrappedValue: 0) var age: Int
}
```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<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Self {
        get {
            logger(.get, wrappedValue)
            return self
        }
        set {
            wrappedValue = newValue.wrappedValue
            logger(.set, wrappedValue)
        }
    }
}

// Example usage:
struct User {
    @Logged(wrappedValue: 0) var age: Int
}

// Usage:
let user = User()
user.age = 30
print(user.age) // Logs "get" and "set" events
<|file_separator|>
struct Logged<Value>: LoggedProtocol { // property wrapper type 'Logged' has multiple non-static properties named 'wrappedValue'
var wrappedValue: Value { // invalid redeclaration of 'wrappedValue'
logger(.set, wrappedValue) // ambiguous use of 'wrappedValue'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}
```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<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void

    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }

    var wrappedValue: Value {
        didSet {
            logger(.set, wrappedValue)
        }
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return self
    }

    var projectedValue: Logged<Value> {
        return
let logger: (Event, Int) -> Void = { // immutable value 'logger' was never used; consider replacing with '_' or removing it
@Logged(logger: logger) var value: Int = 0 // unknown attribute 'Logged'

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("User.logged: \(event) \(value)")
    })
    var age: Int
}
```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<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Example usage:
struct User {
    @Logged(wrappedValue: 0, logger: { event, value in
        print("User.logged: \(event) \(value)")
    })
    var age: Int
}

// Create a User instance and log its age.
let user = User(age: 30)
print(user.age) // 30
user.age = 35
print(user.age) // 35
<|file_separator|>
 // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

@propertyWrapper
struct Logged2<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

@propertyWrapper
struct Logged3<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

@propertyWrapper
struct Logged4<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

@propertyWrapper
struct Logged5<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

@propertyWrapper
struct Logged6<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

@propertyWrapper
struct Logged7<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            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<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged2<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged3<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged4<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged5<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged6<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged7<Value>: LoggedProtocol {
    var wrappedValue: Value
    var logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Property wrapper that logs access and modification of the wrapped property.
@propertyWrapper
struct Logged8<Value>:
 // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])

enum Event {
    case get, set
}

protocol LoggedProtocol {
    associatedtype Value
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void)
}

@propertyWrapper
struct Logged<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

struct User {
    @Logged(wrappedValue: 10, logger: { event, value in
        print("User.wrappedValue: \(event) \(value)")
    })
    var age: Int
}
```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<Value>: LoggedProtocol {
    var wrappedValue: Value
    let logger: (Event, Value) -> Void
    
    init(wrappedValue: Value, logger: @escaping (Event, Value) -> Void) {
        self.wrappedValue = wrappedValue
        self.logger = logger
    }
    
    var wrapped: Value {
        get {
            logger(.get, wrappedValue)
            return wrappedValue
        }
        set {
            logger(.set, newValue)
            wrappedValue = newValue
        }
    }
}

// Example usage:
struct User {
    @Logged(wrappedValue: 10, logger: { event, value in
        print("User.wrappedValue: \(event) \(value)")
    })
    var age: Int
}

// Create a User instance and log its age.
let user = User(age: 30)
print(user.age) // Output: User.wrappedValue: get 30
user.age = 40 // Output: User.wrappedValue: set 40
print(user.age) // Output: User.wrappedValue: get 40
<|file_separator|>
 // XCTAssertEqual failed: ([]) is not equal to (["Accessing value: 0"])

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 {
    
    private let provider: WeatherProvider
    
    required init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard deletion
            return nil
        case .searchButtonPress:
            // Handle search button press
            return nil
        }
    }
}

class WeatherProvider: WeatherProvider {
    
    func forecast(for city: String) throws -> String {
        // Check forecast for a given city
        return ""
    }
}

class WeatherApplicationDependencies: WeatherApplicationDependencies {
    
    let provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

class WeatherApplicationInteractions: WeatherApplicationInteractions {
    
    private let provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard deletion
            return nil
        case .searchButtonPress:
            // Handle search button press
            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 {
    
    private let provider: WeatherProvider
    
    required init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard deletion
            return nil
        case .searchButtonPress:
            // Handle search button press
            return nil
        }
    }
}

// Weather provider.
// Check forecast for a given city.
class WeatherProvider: WeatherProvider {
    
    func forecast(for city: String) throws -> String {
        // Check forecast for a given city
        return ""
    }
}

// Weather application dependencies.
// Provide dependencies to WeatherApplication.
class WeatherApplicationDependencies: WeatherApplicationDependencies {
    
    let provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application interactions.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplicationInteractions: WeatherApplicationInteractions {
    
    private let provider: WeatherProvider
    
    init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard deletion
            return nil
        case .searchButtonPress:
            // Handle search button press
            return nil
        }
    }
}
<|file_separator|>
init(provider: WeatherProvider) // 'WeatherProvider' is ambiguous for type lookup in this context
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
required init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
case .keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it
class WeatherProvider: WeatherProvider { // invalid redeclaration of 'WeatherProvider'
class WeatherProvider: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherApplicationDependencies: WeatherApplicationDependencies { // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
class WeatherApplicationDependencies: WeatherApplicationDependencies { // invalid redeclaration of 'WeatherApplicationDependencies'
let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherApplicationInteractions: WeatherApplicationInteractions { // invalid redeclaration of 'WeatherApplicationInteractions'
class WeatherApplicationInteractions: WeatherApplicationInteractions { // 'WeatherApplicationInteractions' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
case .keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it
struct WeatherProviderImplementation: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'

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 {
    private let provider: WeatherProvider
    private let searchBar: SearchBar
    private let tableView: UITableView
    private let keyboard: Keyboard
    private let feedback: Feedback

    init(provider: WeatherProvider,
         searchBar: SearchBar,
         tableView: UITableView,
         keyboard: Keyboard,
         feedback: Feedback) {
        self.provider = provider
        self.searchBar = searchBar
        self.tableView = tableView
        self.keyboard = keyboard
        self.feedback = feedback
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBar.append(character)
        case .keyboardDeleteBackwards:
            searchBar.deleteBackward()
        case .searchButtonPress:
            guard let city = searchBar.text else {
                return nil
            }
            do {
                let forecast = try provider.forecast(for: city)
                feedback.success(city: city, forecast: forecast)
            } catch {
                feedback.failure(city: city)
            }
        }
        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 {
    private let provider: WeatherProvider
    private let searchBar: SearchBar
    private let tableView: UITableView
    private let keyboard: Keyboard
    private let feedback: Feedback

    init(provider: WeatherProvider,
         searchBar: SearchBar,
         tableView: UITableView,
         keyboard: Keyboard,
         feedback: Feedback) {
        self.provider = provider
        self.searchBar = searchBar
        self.tableView = tableView
        self.keyboard = keyboard
        self.feedback = feedback
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBar.append(character)
        case .keyboardDeleteBackwards:
            searchBar.deleteBackward()
        case .searchButtonPress:
            guard let city = searchBar.text else {
                return nil
            }
            do {
                let forecast = try provider.forecast(for: city)
                feedback.success(city: city, forecast: forecast)
            } catch {
                feedback.failure(city: city)
            }
        }
        return nil
    }
}
<|file_separator|>
private let searchBar: SearchBar // cannot find type 'SearchBar' in scope
private let tableView: UITableView // cannot find type 'UITableView' in scope
private let keyboard: Keyboard // cannot find type 'Keyboard' in scope
private let feedback: Feedback // cannot find type 'Feedback' in scope
searchBar: SearchBar, // cannot find type 'SearchBar' in scope
tableView: UITableView, // cannot find type 'UITableView' in scope
keyboard: Keyboard, // cannot find type 'Keyboard' in scope
feedback: Feedback) { // cannot find type 'Feedback' in scope
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'

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 {
    private let provider: WeatherProvider
    private let searchBar = SearchBar()
    private let forecastView = ForecastView()
    private let keyboard = Keyboard()
    private let searchButton = SearchButton()

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBar.insert(character)
        case .keyboardDeleteBackwards:
            searchBar.deleteBackward()
        case .searchButtonPress:
            forecastView.show(for: searchBar.text)
        }
    }
}

class SearchBar {
    var text: String = ""

    func insert(_ character: Character) {
        text += String(character)
    }

    func deleteBackward() {
        text.removeLast()
    }
}

class ForecastView {
    func show(for city: String) {
        // Show forecast for city.
    }
}

class Keyboard {
    func character(at index: Int) -> Character? {
        // Get character at index.
    }
}

class SearchButton {
    func press() {
        // Press search button.
    }
}
```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 {
    private let provider: WeatherProvider
    private let searchBar = SearchBar()
    private let forecastView = ForecastView()
    private let keyboard = Keyboard()
    private let searchButton = SearchButton()

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBar.insert(character)
        case .keyboardDeleteBackwards:
            searchBar.deleteBackward()
        case .searchButtonPress:
            forecastView.show(for: searchBar.text)
        }
    }
}

// Search bar.
class SearchBar {
    var text: String = ""

    func insert(_ character: Character) {
        text += String(character)
    }

    func deleteBackward() {
        text.removeLast()
    }
}

// Forecast view.
class ForecastView {
    func show(for city: String) {
        // Show forecast for city.
    }
}

// Keyboard.
class Keyboard {
    func character(at index: Int) -> Character? {
        // Get character at index.
    }
}

// Search button.
class SearchButton {
    func press() {
        // Press search button.
    }
}
<|file_separator|>
init(provider: WeatherProvider) { // initializer requirement 'init(provider:)' can only be satisfied by a 'required' initializer in non-final class 'WeatherApplication'
searchBar.insert(character) // cannot convert value of type '()' to specified type 'ApplicationFeedback'

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 {
    
    private let provider: WeatherProvider
    
    required init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection.
            // ...
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard delete backwards.
            // ...
            return nil
        case .searchButtonPress:
            // Handle search button press.
            // ...
            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 {
    
    private let provider: WeatherProvider
    
    required init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection.
            // ...
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard delete backwards.
            // ...
            return nil
        case .searchButtonPress:
            // Handle search button press.
            // ...
            return nil
        }
    }
}

// Weather provider.
// Check forecast for a given city.
class WeatherProvider: WeatherProvider {
    
    func forecast(for city: String) throws -> String {
        // ...
        return ""
    }
}
<|file_separator|>
init(provider: WeatherProvider) // 'WeatherProvider' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
required init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
case .keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it
class WeatherProvider: WeatherProvider { // invalid redeclaration of 'WeatherProvider'
class WeatherProvider: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
struct WeatherProviderImplementation: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'

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 {
    private let provider: WeatherProvider
    private let searchBar: SearchBar
    private let forecastView: ForecastView
    private let keyboard: Keyboard
    private let searchButton: SearchButton
    private let feedbackView: FeedbackView
    private let feedbackViewPresenter: FeedbackViewPresenter

    init(provider: WeatherProvider) {
        self.provider = provider
        searchBar = SearchBar()
        forecastView = ForecastView()
        keyboard = Keyboard()
        searchButton = SearchButton()
        feedbackView = FeedbackView()
        feedbackViewPresenter = FeedbackViewPresenter()
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBar.update(with: character)
        case .keyboardDeleteBackwards:
            searchBar.delete()
        case .searchButtonPress:
            let city = searchBar.text
            do {
                let forecast = try provider.forecast(for: city)
                forecastView.update(with: forecast)
                feedbackViewPresenter.present(feedback: .success(city: city, forecast: forecast))
            } catch {
                feedbackViewPresenter.present(feedback: .failure(city: city))
            }
        }
        return nil
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        // ...
        return "Sunny"
    }
}

class WeatherApplicationDependencies: WeatherApplicationDependencies {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

class WeatherApplicationInteractions: WeatherApplicationInteractions {
    private let dependencies: WeatherApplicationDependencies

    init(dependencies: WeatherApplicationDependencies) {
        self.dependencies = dependencies
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        // Handle user actions to fill search bar results and use WeatherProvider to check forecast.
        // ...
        return nil
    }
}

class WeatherApplication: WeatherApplicationProtocol {
    private let dependencies: WeatherApplicationDependencies
    private let interactions: WeatherApplicationInteractions

    init(dependencies: WeatherApplicationDependencies, interactions: WeatherApplicationInteractions) {
        self.dependencies = dependencies
        self.interactions = interactions
    }
}
```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 {
    private let provider: WeatherProvider
    private let searchBar: SearchBar
    private let forecastView: ForecastView
    private let keyboard: Keyboard
    private let searchButton: SearchButton
    private let feedbackView: FeedbackView
    private let feedbackViewPresenter: FeedbackViewPresenter

    init(provider: WeatherProvider) {
        self.provider = provider
        searchBar = SearchBar()
        forecastView = ForecastView()
        keyboard = Keyboard()
        searchButton = SearchButton()
        feedbackView = FeedbackView()
        feedbackViewPresenter = FeedbackViewPresenter()
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBar.update(with: character)
        case .keyboardDeleteBackwards:
            searchBar.delete()
        case .searchButtonPress:
            let city = searchBar.text
            do {
                let forecast = try provider.forecast(for: city)
                forecastView.update(with: forecast)
                feedbackViewPresenter.present(feedback: .success(city: city, forecast: forecast))
            } catch {
                feedbackViewPresenter.present(feedback: .failure(city: city))
            }
        }
        return nil
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        // ...
        return "Sunny"
    }
}

// Weather application dependencies.
// Provide WeatherProvider to WeatherApplication.
class WeatherApplicationDependencies: WeatherApplicationDependencies {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application interactions.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplicationInteractions: WeatherApplicationInteractions {
    private let dependencies: WeatherApplicationDependencies

    init(dependencies: WeatherApplicationDependencies) {
        self.dependencies = dependencies
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        // Handle user actions to fill search bar results and use WeatherProvider to check forecast.
        // ...
        return nil
    }
}

// Weather application.
// Provide WeatherProvider to WeatherApplication.
class WeatherApplication: WeatherApplicationProtocol {
    private let dependencies: WeatherApplicationDependencies
    private let interactions: WeatherApplicationInteractions

    init(dependencies: WeatherApplicationDependencies, interactions: WeatherApplicationInteractions) {
        self.dependencies = dependencies
        self.interactions = interactions
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        // ...
        return "Sunny"
    }
}

// Weather application dependencies.
// Provide WeatherProvider to WeatherApplication.
class WeatherApplicationDependencies: WeatherApplicationDependencies {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application interactions.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplicationInteractions: WeatherApplicationInteractions {
    private let dependencies: WeatherApplicationDependencies

    init(dependencies: WeatherApplicationDependencies) {
        self.dependencies = dependencies
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        // Handle user actions to fill search bar results and use WeatherProvider to check forecast.
        // ...
        return nil
    }
}

// Weather application.
// Provide WeatherProvider to WeatherApplication.
class WeatherApplication: WeatherApplicationProtocol {
    private let dependencies: WeatherApplicationDependencies
    private let interactions: WeatherApplicationInteractions

    init(dependencies: WeatherApplicationDependencies, interactions: WeatherApplicationInteractions) {
        self.dependencies = dependencies
        self.interactions = interactions
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        // ...
        return "Sunny"
    }
}

// Weather application dependencies.
// Provide WeatherProvider to WeatherApplication.
class WeatherApplicationDependencies: WeatherApplicationDependencies {
    let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application interactions.
// Handle user actions to fill search bar results and use Weather
init(provider: WeatherProvider) // 'WeatherProvider' is ambiguous for type lookup in this context
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
private let searchBar: SearchBar // cannot find type 'SearchBar' in scope
private let forecastView: ForecastView // cannot find type 'ForecastView' in scope
private let keyboard: Keyboard // cannot find type 'Keyboard' in scope
private let searchButton: SearchButton // cannot find type 'SearchButton' in scope
private let feedbackView: FeedbackView // cannot find type 'FeedbackView' in scope
private let feedbackViewPresenter: FeedbackViewPresenter // cannot find type 'FeedbackViewPresenter' in scope
init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
searchBar = SearchBar() // cannot find 'SearchBar' in scope
forecastView = ForecastView() // cannot find 'ForecastView' in scope
keyboard = Keyboard() // cannot find 'Keyboard' in scope
searchButton = SearchButton() // cannot find 'SearchButton' in scope
feedbackView = FeedbackView() // cannot find 'FeedbackView' in scope
feedbackViewPresenter = FeedbackViewPresenter() // cannot find 'FeedbackViewPresenter' in scope
feedbackViewPresenter.present(feedback: .success(city: city, forecast: forecast)) // cannot infer contextual base in reference to member 'success'
feedbackViewPresenter.present(feedback: .failure(city: city)) // cannot infer contextual base in reference to member 'failure'
class WeatherProvider: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherProvider: WeatherProvider { // invalid redeclaration of 'WeatherProvider'
class WeatherApplicationDependencies: WeatherApplicationDependencies { // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
class WeatherApplicationDependencies: WeatherApplicationDependencies { // invalid redeclaration of 'WeatherApplicationDependencies'
let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherApplicationInteractions: WeatherApplicationInteractions { // 'WeatherApplicationInteractions' is ambiguous for type lookup in this context
class WeatherApplicationInteractions: WeatherApplicationInteractions { // invalid redeclaration of 'WeatherApplicationInteractions'
private let dependencies: WeatherApplicationDependencies // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
init(dependencies: WeatherApplicationDependencies) { // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
class WeatherApplication: WeatherApplicationProtocol { // invalid redeclaration of 'WeatherApplication'
private let dependencies: WeatherApplicationDependencies // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
private let interactions: WeatherApplicationInteractions // 'WeatherApplicationInteractions' is ambiguous for type lookup in this context
init(dependencies: WeatherApplicationDependencies, interactions: WeatherApplicationInteractions) { // 'WeatherApplicationInteractions' is ambiguous for type lookup in this context
init(dependencies: WeatherApplicationDependencies, interactions: WeatherApplicationInteractions) { // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
struct WeatherProviderImplementation: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'

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 {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []
    private var forecast: String?

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            return nil
        case .keyboardDeleteBackwards:
            if !searchBarResults.isEmpty {
                searchBarResults.removeLast()
            }
            return nil
        case .searchButtonPress:
            guard let city = searchBarResults.joined() else {
                return nil
            }
            do {
                forecast = try provider.forecast(for: city)
                return .success(city: city, forecast: forecast!)
            } catch {
                return .failure(city: city)
            }
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given 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 {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []
    private var forecast: String?

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            return nil
        case .keyboardDeleteBackwards:
            if !searchBarResults.isEmpty {
                searchBarResults.removeLast()
            }
            return nil
        case .searchButtonPress:
            guard let city = searchBarResults.joined() else {
                return nil
            }
            do {
                forecast = try provider.forecast(for: city)
                return .success(city: city, forecast: forecast!)
            } catch {
                return .failure(city: city)
            }
        }
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        // ...
        return "Sunny"
    }
}
<|file_separator|>
init(provider: WeatherProvider) // 'WeatherProvider' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
required init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
guard let city = searchBarResults.joined() else { // initializer for conditional binding must have Optional type, not 'String'
} catch { // 'catch' block is unreachable because no errors are thrown in 'do' block
class WeatherProvider: WeatherProvider { // invalid redeclaration of 'WeatherProvider'
class WeatherProvider: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
struct WeatherProviderImplementation: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'

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 {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            return nil
        case .keyboardDeleteBackwards:
            if !searchBarResults.isEmpty {
                searchBarResults.removeLast()
            }
            return nil
        case .searchButtonPress:
            guard let forecast = try? provider.forecast(for: searchBarResults.joined()) else {
                return .failure(city: searchBarResults.joined())
            }
            return .success(city: searchBarResults.joined(), forecast: forecast)
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        // ...
        return "Sunny"
    }
}

class WeatherApplicationDependencies: WeatherApplicationDependencies {
    private let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

class WeatherApplicationInteractions: WeatherApplicationInteractions {
    private let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            return nil
        case .keyboardDeleteBackwards:
            if !searchBarResults.isEmpty {
                searchBarResults.removeLast()
            }
            return nil
        case .searchButtonPress:
            guard let forecast = try? provider.forecast(for: searchBarResults.joined()) else {
                return .failure(city: searchBarResults.joined())
            }
            return .success(city: searchBarResults.joined(), forecast: forecast)
        }
    }
}
```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 {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            return nil
        case .keyboardDeleteBackwards:
            if !searchBarResults.isEmpty {
                searchBarResults.removeLast()
            }
            return nil
        case .searchButtonPress:
            guard let forecast = try? provider.forecast(for: searchBarResults.joined()) else {
                return .failure(city: searchBarResults.joined())
            }
            return .success(city: searchBarResults.joined(), forecast: forecast)
        }
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        // ...
        return "Sunny"
    }
}

// Weather application dependencies.
// Provide dependencies to WeatherApplication.
class WeatherApplicationDependencies: WeatherApplicationDependencies {
    private let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }
}

// Weather application interactions.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplicationInteractions: WeatherApplicationInteractions {
    private let provider: WeatherProvider

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            return nil
        case .keyboardDeleteBackwards:
            if !searchBarResults.isEmpty {
                searchBarResults.removeLast()
            }
            return nil
        case .searchButtonPress:
            guard let forecast = try? provider.forecast(for: searchBarResults.joined()) else {
                return .failure(city: searchBarResults.joined())
            }
            return .success(city: searchBarResults.joined(), forecast: forecast)
        }
    }
}

// Weather application.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplication: WeatherApplicationProtocol {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []

    init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            return nil
        case .keyboardDeleteBackwards:
            if !searchBarResults.isEmpty {
                searchBarResults.removeLast()
            }
            return nil
        case .searchButtonPress:
            guard let forecast = try? provider.forecast(for: searchBarResults.joined()) else {
                return .failure(city: searchBarResults.joined())
            }
            return .success(city: searchBarResults.joined(), forecast: forecast)
        }
    }
}
<|file_separator|>
init(provider: WeatherProvider) // 'WeatherProvider' is ambiguous for type lookup in this context
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherProvider: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherProvider: WeatherProvider { // invalid redeclaration of 'WeatherProvider'
class WeatherApplicationDependencies: WeatherApplicationDependencies { // invalid redeclaration of 'WeatherApplicationDependencies'
class WeatherApplicationDependencies: WeatherApplicationDependencies { // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherApplicationInteractions: WeatherApplicationInteractions { // 'WeatherApplicationInteractions' is ambiguous for type lookup in this context
class WeatherApplicationInteractions: WeatherApplicationInteractions { // invalid redeclaration of 'WeatherApplicationInteractions'
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
searchBarResults.append(String(character)) // cannot find 'searchBarResults' in scope
if !searchBarResults.isEmpty { // cannot find 'searchBarResults' in scope
searchBarResults.removeLast() // cannot find 'searchBarResults' in scope
guard let forecast = try? provider.forecast(for: searchBarResults.joined()) else { // cannot find 'searchBarResults' in scope
return .failure(city: searchBarResults.joined()) // cannot find 'searchBarResults' in scope
return .success(city: searchBarResults.joined(), forecast: forecast) // cannot find 'searchBarResults' in scope
struct WeatherProviderImplementation: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'

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 {
    private let provider: WeatherProvider
    private let searchBar: SearchBar
    private let tableView: UITableView
    private let keyboard: Keyboard
    private let feedback: Feedback
    private let searchBarResults: SearchBarResults
    private let tableViewDataSource: WeatherApplicationTableViewDataSource
    private let tableViewDelegate: WeatherApplicationTableViewDelegate
    private let keyboardDelegate: KeyboardDelegate
    private let feedbackDelegate: FeedbackDelegate

    init(provider: WeatherProvider,
         searchBar: SearchBar,
         tableView: UITableView,
         keyboard: Keyboard,
         feedback: Feedback,
         searchBarResults: SearchBarResults,
         tableViewDataSource: WeatherApplicationTableViewDataSource,
         tableViewDelegate: WeatherApplicationTableViewDelegate,
         keyboardDelegate: KeyboardDelegate,
         feedbackDelegate: FeedbackDelegate) {
        self.provider = provider
        self.searchBar = searchBar
        self.tableView = tableView
        self.keyboard = keyboard
        self.feedback = feedback
        self.searchBarResults = searchBarResults
        self.tableViewDataSource = tableViewDataSource
        self.tableViewDelegate = tableViewDelegate
        self.keyboardDelegate = keyboardDelegate
        self.feedbackDelegate = feedbackDelegate
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.add(character: character)
            searchBar.text = searchBarResults.text
        case .keyboardDeleteBackwards:
            searchBarResults.removeLast()
            searchBar.text = searchBarResults.text
        case .searchButtonPress:
            guard let city = searchBarResults.text else {
                return nil
            }
            do {
                let forecast = try provider.forecast(for: city)
                feedback.success(city: city, forecast: forecast)
            } catch {
                feedback.failure(city: city)
            }
        }
        return nil
    }
}

class SearchBarResults {
    private var characters: [Character] = []

    var text: String? {
        characters.isEmpty ? nil : String(characters)
    }

    func add(character: Character) {
        characters.append(character)
    }

    func removeLast() {
        characters.removeLast()
    }
}

class WeatherApplicationTableViewDataSource {
    private let tableView: UITableView

    init(tableView: UITableView) {
        self.tableView = tableView
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        1
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = "Forecast"
        return cell
    }
}

class WeatherApplicationTableViewDelegate {
    private let tableView: UITableView

    init(tableView: UITableView) {
        self.tableView = tableView
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
    }
}

class KeyboardDelegate {
    private let keyboard: Keyboard

    init(keyboard: Keyboard) {
        self.keyboard = keyboard
    }

    func keyboard(_ keyboard: Keyboard, didChangeText text: String) {
        keyboard.text = text
    }
}

class FeedbackDelegate {
    private let feedback: Feedback

    init(feedback: Feedback) {
        self.feedback = feedback
    }

    func feedback(_ feedback: Feedback) {
        feedback.success(city: "London", forecast: "Sunny")
        feedback.failure(city: "London")
    }
}

class Feedback {
    func success(city: String, forecast: String) {
        print("Success: \(city) - \(forecast)")
    }

    func failure(city: String) {
        print("Failure: \(city)")
    }
}

class Keyboard {
    var text: String?
}
```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 {
    private let provider: WeatherProvider
    private let searchBar: SearchBar
    private let tableView: UITableView
    private let keyboard: Keyboard
    private let feedback: Feedback
    private let searchBarResults: SearchBarResults
    private let tableViewDataSource: WeatherApplicationTableViewDataSource
    private let tableViewDelegate: WeatherApplicationTableViewDelegate
    private let keyboardDelegate: KeyboardDelegate
    private let feedbackDelegate: FeedbackDelegate

    init(provider: WeatherProvider,
         searchBar: SearchBar,
         tableView: UITableView,
         keyboard: Keyboard,
         feedback: Feedback,
         searchBarResults: SearchBarResults,
         tableViewDataSource: WeatherApplicationTableViewDataSource,
         tableViewDelegate: WeatherApplicationTableViewDelegate,
         keyboardDelegate: KeyboardDelegate,
         feedbackDelegate: FeedbackDelegate) {
        self.provider = provider
        self.searchBar = searchBar
        self.tableView = tableView
        self.keyboard = keyboard
        self.feedback = feedback
        self.searchBarResults = searchBarResults
        self.tableViewDataSource = tableViewDataSource
        self.tableViewDelegate = tableViewDelegate
        self.keyboardDelegate = keyboardDelegate
        self.feedbackDelegate = feedbackDelegate
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.add(character: character)
            searchBar.text = searchBarResults.text
        case .keyboardDeleteBackwards:
            searchBarResults.removeLast()
            searchBar.text = searchBarResults.text
        case .searchButtonPress:
            guard let city = searchBarResults.text else {
                return nil
            }
            do {
                let forecast = try provider.forecast(for: city)
                feedback.success(city: city, forecast: forecast)
            } catch {
                feedback.failure(city: city)
            }
        }
        return nil
    }
}

// SearchBarResults is a helper class to store and manage the search bar results.
class SearchBarResults {
    private var characters: [Character] = []

    var text: String? {
        characters.isEmpty ? nil : String(characters)
    }

    func add(character: Character) {
        characters.append(character)
    }

    func removeLast() {
        characters.removeLast()
    }
}

// WeatherApplicationTableViewDataSource is a helper class to manage the table view data source.
class WeatherApplicationTableViewDataSource {
    private let tableView: UITableView

    init(tableView: UITableView) {
        self.tableView = tableView
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        1
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = "Forecast"
        return cell
    }
}

// WeatherApplicationTableViewDelegate is a helper class to manage the table view delegate.
class WeatherApplicationTableViewDelegate {
    private let tableView: UITableView

    init(tableView: UITableView) {
        self.tableView = tableView
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        tableView.deselectRow(at: indexPath, animated: true)
    }
}

// KeyboardDelegate is a helper class to manage the keyboard delegate.
class KeyboardDelegate {
    private let keyboard: Keyboard

    init(keyboard: Keyboard) {
        self.keyboard = keyboard
    }

    func keyboard(_ keyboard: Keyboard, didChangeText text: String) {
        keyboard.text = text
    }
}

// FeedbackDelegate is a helper class to manage the feedback delegate.
class FeedbackDelegate {
    private let feedback: Feedback

    init(feedback: Feedback) {
        self.feedback = feedback
    }

    func feedback(_ feedback: Feedback) {
        feedback.success(city: "London", forecast: "Sunny")
        feedback.failure(city: "London")
    }
}

// Feedback is a helper class to manage the feedback.
class Feedback {
    func success(city: String, forecast: String) {
        print("Success: \(city) - \(forecast)")
    }

    func failure(city: String) {
        print("Failure: \(city)")
    }
}

// Keyboard is a helper class to manage the keyboard.
class Keyboard {
    var text: String?
}

// SearchBar is a helper class to manage the search bar.
class SearchBar {
    var text
private let searchBar: SearchBar // cannot find type 'SearchBar' in scope
private let tableView: UITableView // cannot find type 'UITableView' in scope
searchBar: SearchBar, // cannot find type 'SearchBar' in scope
tableView: UITableView, // cannot find type 'UITableView' in scope
private let tableView: UITableView // cannot find type 'UITableView' in scope
init(tableView: UITableView) { // cannot find type 'UITableView' in scope
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { // cannot find type 'UITableView' in scope
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { // cannot find type 'UITableView' in scope
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { // cannot find type 'UITableViewCell' in scope
private let tableView: UITableView // cannot find type 'UITableView' in scope
init(tableView: UITableView) { // cannot find type 'UITableView' in scope
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { // cannot find type 'UITableView' in scope
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'

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 {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []
    private var searchBarResultsCount: Int = 0
    private var searchBarResultsIndex: Int = 0
    private var searchBarResultsSelected: String = ""

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            searchBarResultsCount += 1
            searchBarResultsIndex = searchBarResults.count - 1
            searchBarResultsSelected = searchBarResults.joined()
            return nil
        case .keyboardDeleteBackwards:
            if searchBarResults.count > 0 {
                searchBarResults.removeLast()
                searchBarResultsCount -= 1
                searchBarResultsIndex = searchBarResults.count - 1
                searchBarResultsSelected = searchBarResults.joined()
                return nil
            }
            return nil
        case .searchButtonPress:
            if searchBarResults.count > 0 {
                let forecast = try? provider.forecast(for: searchBarResultsSelected)
                if let forecast = forecast {
                    return .success(city: searchBarResultsSelected, forecast: forecast)
                }
                return .failure(city: searchBarResultsSelected)
            }
            return nil
        }
    }
}

class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        return "Forecast for \(city)"
    }
}

class WeatherApplicationDependencies: WeatherApplicationDependencies {
    required init(provider: WeatherProvider) {
        // Provide dependencies for WeatherApplication.
    }
}

class WeatherApplicationInteractions: WeatherApplicationInteractions {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []
    private var searchBarResultsCount: Int = 0
    private var searchBarResultsIndex: Int = 0
    private var searchBarResultsSelected: String = ""

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            searchBarResultsCount += 1
            searchBarResultsIndex = searchBarResults.count - 1
            searchBarResultsSelected = searchBarResults.joined()
            return nil
        case .keyboardDeleteBackwards:
            if searchBarResults.count > 0 {
                searchBarResults.removeLast()
                searchBarResultsCount -= 1
                searchBarResultsIndex = searchBarResults.count - 1
                searchBarResultsSelected = searchBarResults.joined()
                return nil
            }
            return nil
        case .searchButtonPress:
            if searchBarResults.count > 0 {
                let forecast = try? provider.forecast(for: searchBarResultsSelected)
                if let forecast = forecast {
                    return .success(city: searchBarResultsSelected, forecast: forecast)
                }
                return .failure(city: searchBarResultsSelected)
            }
            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 {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []
    private var searchBarResultsCount: Int = 0
    private var searchBarResultsIndex: Int = 0
    private var searchBarResultsSelected: String = ""

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            searchBarResultsCount += 1
            searchBarResultsIndex = searchBarResults.count - 1
            searchBarResultsSelected = searchBarResults.joined()
            return nil
        case .keyboardDeleteBackwards:
            if searchBarResults.count > 0 {
                searchBarResults.removeLast()
                searchBarResultsCount -= 1
                searchBarResultsIndex = searchBarResults.count - 1
                searchBarResultsSelected = searchBarResults.joined()
                return nil
            }
            return nil
        case .searchButtonPress:
            if searchBarResults.count > 0 {
                let forecast = try? provider.forecast(for: searchBarResultsSelected)
                if let forecast = forecast {
                    return .success(city: searchBarResultsSelected, forecast: forecast)
                }
                return .failure(city: searchBarResultsSelected)
            }
            return nil
        }
    }
}

// Weather provider.
// Check forecast for given city.
class WeatherProvider: WeatherProvider {
    func forecast(for city: String) throws -> String {
        // Check forecast for given city.
        return "Forecast for \(city)"
    }
}

// Weather application dependencies.
// Provide dependencies for WeatherApplication.
class WeatherApplicationDependencies: WeatherApplicationDependencies {
    required init(provider: WeatherProvider) {
        // Provide dependencies for WeatherApplication.
    }
}

// Weather application interactions.
// Handle user actions to fill search bar results and use WeatherProvider to check forecast.
class WeatherApplicationInteractions: WeatherApplicationInteractions {
    private let provider: WeatherProvider
    private var searchBarResults: [String] = []
    private var searchBarResultsCount: Int = 0
    private var searchBarResultsIndex: Int = 0
    private var searchBarResultsSelected: String = ""

    required init(provider: WeatherProvider) {
        self.provider = provider
    }

    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            searchBarResults.append(String(character))
            searchBarResultsCount += 1
            searchBarResultsIndex = searchBarResults.count - 1
            searchBarResultsSelected = searchBarResults.joined()
            return nil
        case .keyboardDeleteBackwards:
            if searchBarResults.count > 0 {
                searchBarResults.removeLast()
                searchBarResultsCount -= 1
                searchBarResultsIndex = searchBarResults.count - 1
                searchBarResultsSelected = searchBarResults.joined()
                return nil
            }
            return nil
        case .searchButtonPress:
            if searchBarResults.count > 0 {
                let forecast = try? provider.forecast(for: searchBarResultsSelected)
                if let forecast = forecast {
                    return .success(city: searchBarResultsSelected, forecast: forecast)
                }
                return .failure(city: searchBarResultsSelected)
            }
            return nil
        }
    }
}
<|file_separator|>
init(provider: WeatherProvider) // 'WeatherProvider' is ambiguous for type lookup in this context
typealias WeatherApplicationProtocol = WeatherApplicationDependencies & WeatherApplicationInteractions // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
required init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherProvider: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherProvider: WeatherProvider { // invalid redeclaration of 'WeatherProvider'
class WeatherApplicationDependencies: WeatherApplicationDependencies { // 'WeatherApplicationDependencies' is ambiguous for type lookup in this context
class WeatherApplicationDependencies: WeatherApplicationDependencies { // invalid redeclaration of 'WeatherApplicationDependencies'
required init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
class WeatherApplicationInteractions: WeatherApplicationInteractions { // invalid redeclaration of 'WeatherApplicationInteractions'
class WeatherApplicationInteractions: WeatherApplicationInteractions { // 'WeatherApplicationInteractions' is ambiguous for type lookup in this context
private let provider: WeatherProvider // 'WeatherProvider' is ambiguous for type lookup in this context
required init(provider: WeatherProvider) { // 'WeatherProvider' is ambiguous for type lookup in this context
struct WeatherProviderImplementation: WeatherProvider { // 'WeatherProvider' is ambiguous for type lookup in this context
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("K"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("y"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("i"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("v"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // cannot infer contextual base in reference to member 'searchButtonPress'
XCTAssertEqual(application.handle(action: .searchButtonPress), .success(city: "Kyiv", forecast: "+28")) // type 'Equatable' has no member 'success'
(0..<4).forEach { _ in _ = application.handle(action: .keyboardDeleteBackwards) } // Clear search input // cannot infer contextual base in reference to member 'keyboardDeleteBackwards'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("W"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("s"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("a"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertNil(application.handle(action: .keyboardCharacterSelect("w"))) // cannot infer contextual base in reference to member 'keyboardCharacterSelect'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // type 'Equatable' has no member 'failure'
XCTAssertEqual(application.handle(action: .searchButtonPress), .failure(city: "Wsaw")) // cannot infer contextual base in reference to member 'searchButtonPress'

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 {
    
    private let provider: WeatherProvider
    
    required init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection.
            // Update search bar text.
            // Update search bar results.
            // Update search bar results view.
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard delete backwards.
            // Update search bar text.
            // Update search bar results.
            // Update search bar results view.
            return nil
        case .searchButtonPress:
            // Handle search button press.
            // Get forecast for selected city.
            // Update search bar text.
            // Update search bar results.
            // Update search bar results view.
            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 {
    
    private let provider: WeatherProvider
    
    required init(provider: WeatherProvider) {
        self.provider = provider
    }
    
    func handle(action: UserAction) -> ApplicationFeedback? {
        switch action {
        case .keyboardCharacterSelect(let character):
            // Handle keyboard character selection.
            // Update search bar text.
            // Update search bar results.
            // Update search bar results view.
            return nil
        case .keyboardDeleteBackwards:
            // Handle keyboard delete backwards.
            // Update search bar text.
            // Update search bar results.
            // Update search bar results view.
            return nil
        case .searchButtonPress:
            // Handle search button press.
            // Get forecast for selected city.
            // Update search bar text.
            // Update search bar results.
            // Update search bar results view.
            return nil
        }
    }
}
<|file_separator|>
case .keyboardCharacterSelect(let character): // immutable value 'character' was never used; consider replacing with '_' or removing it
 // XCTAssertEqual failed: (nil) is not equal to (Optional(Solution.ApplicationFeedback.success(city: "Kyiv", forecast: "+28")))

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 var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                Task {
                    continuation.resume(returning: balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            Task {
                balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            Task {
                if balance >= amount {
                    balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: 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 {
    private var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                Task {
                    continuation.resume(returning: balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            Task {
                balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            Task {
                if balance >= amount {
                    balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: false)
                }
            }
        }
    }
}

// Example usage:
let account = BankAccount(balance: 1000)
Task {
    // Deposit 500
    await account.deposit(amount: 500)
    
    // Withdraw 200
    if let result = await account.withdraw(amount: 200) {
        print("Withdrawal successful")
    } else {
        print("Insufficient funds")
    }
    
    // Check balance
    print("Current balance: \(await account.balance)")
}
<|file_separator|>
private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'
var balance: Double { // invalid redeclaration of 'balance'

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 var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: 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 {
    private var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: false)
                }
            }
        }
    }
}

// Example usage:
let account = BankAccount(balance: 1000)
Task {
    do {
        try await account.deposit(amount: 500)
        print("Current balance: \(try await account.balance)")
        
        if try await account.withdraw(amount: 200) {
            print("Withdrawal successful")
        } else {
            print("Insufficient funds")
        }
        
        print("Current balance: \(try await account.balance)")
    } catch {
        print("Error: \(error)")
    }
}
<|file_separator|>
private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'
var balance: Double { // invalid redeclaration of 'balance'
continuation.resume(returning: self.balance) // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance += amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6
if self.balance >= amount { // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance -= amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6

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 var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: 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 {
    private var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: false)
                }
            }
        }
    }
}

// Example usage:
let account = BankAccount(balance: 100.0)
Task {
    do {
        try await account.deposit(amount: 50.0)
        print("Current balance: \(try await account.balance)")
        
        if try await account.withdraw(amount: 70.0) {
            print("Withdrawal successful")
        } else {
            print("Insufficient funds")
        }
    } catch {
        print("Error: \(error)")
    }
}
<|file_separator|>
private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'
var balance: Double { // invalid redeclaration of 'balance'
continuation.resume(returning: self.balance) // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance += amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6
if self.balance >= amount { // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance -= amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6

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 var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global(qos: .userInteractive).async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global(qos: .userInteractive).async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global(qos: .userInteractive).async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: 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 {
    private var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global(qos: .userInteractive).async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global(qos: .userInteractive).async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global(qos: .userInteractive).async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: false)
                }
            }
        }
    }
}

// Example usage:
let bankAccount = BankAccount(balance: 1000.0)
Task {
    do {
        try await bankAccount.deposit(amount: 500.0)
        let balance = try await bankAccount.balance
        print("Current balance: $\(balance)")
        
        if try await bankAccount.withdraw(amount: 200.0) {
            print("Withdrawal successful.")
        } else {
            print("Insufficient funds.")
        }
    } catch {
        print("Error: \(error)")
    }
}
<|file_separator|>
private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'
var balance: Double { // invalid redeclaration of 'balance'
continuation.resume(returning: self.balance) // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance += amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6
if self.balance >= amount { // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance -= amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6

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 var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: 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 {
    private var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: false)
                }
            }
        }
    }
}

// Example usage:
let account = BankAccount(balance: 100.0)
Task {
    print("Current balance: \(try await account.balance)")
    try await account.deposit(amount: 50.0)
    print("Current balance: \(try await account.balance)")
    if try await account.withdraw(amount: 75.0) {
        print("Withdrawal successful")
    } else {
        print("Insufficient funds")
    }
    print("Current balance: \(try await account.balance)")
}
<|file_separator|>
private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'
var balance: Double { // invalid redeclaration of 'balance'
continuation.resume(returning: self.balance) // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance += amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6
if self.balance >= amount { // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance -= amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6

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 var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                Task {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            Task {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            Task {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: 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 {
    private var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                Task {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            Task {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            Task {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: false)
                }
            }
        }
    }
}

// Example usage:
let bankAccount = BankAccount(balance: 1000)
Task {
    do {
        try await bankAccount.deposit(amount: 500)
        print("Current balance: \(await bankAccount.balance)")
        
        if try await bankAccount.withdraw(amount: 200) {
            print("Withdrawal successful")
        } else {
            print("Insufficient funds")
        }
        
        print("Current balance: \(await bankAccount.balance)")
    } catch {
        print("Error: \(error)")
    }
}
<|file_separator|>
private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'
var balance: Double { // invalid redeclaration of 'balance'

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 var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: 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 {
    private var balance: Double
    
    init(balance: Double) {
        self.balance = balance
    }
    
    var balance: Double {
        get async {
            return await withUnsafeContinuation { continuation in
                DispatchQueue.global().async {
                    continuation.resume(returning: self.balance)
                }
            }
        }
    }
    
    func deposit(amount: Double) async {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                self.balance += amount
                continuation.resume()
            }
        }
    }
    
    func withdraw(amount: Double) async -> Bool {
        await withUnsafeContinuation { continuation in
            DispatchQueue.global().async {
                if self.balance >= amount {
                    self.balance -= amount
                    continuation.resume(returning: true)
                } else {
                    continuation.resume(returning: false)
                }
            }
        }
    }
}

// Example usage:
let account = BankAccount(balance: 100.0)
Task {
    // Deposit 50.0
    await account.deposit(amount: 50.0)
    
    // Withdraw 20.0
    if let result = await account.withdraw(amount: 20.0) {
        print("Withdrawal successful")
    } else {
        print("Insufficient funds")
    }
    
    // Check balance
    print("Current balance: \(await account.balance)")
}
<|file_separator|>
private var balance: Double // property 'balance' must be declared internal because it matches a requirement in internal protocol 'BankAccountProtocol'
var balance: Double { // invalid redeclaration of 'balance'
continuation.resume(returning: self.balance) // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance += amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6
if self.balance >= amount { // actor-isolated property 'balance' can not be referenced from a Sendable closure; this is an error in Swift 6
self.balance -= amount // actor-isolated property 'balance' can not be mutated from a Sendable closure; this is an error in Swift 6