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//
//  VisionFaceTracker.swift
//  Test
//
//  Created by Siarhei Yakushevich on 28.09.21.
//

import Foundation
import Vision

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//
//  CIFaceFilter.swift
//

import Foundation
import CoreImage
import CoreGraphics

// MARK: - FaceFilterFeatures
struct FaceFilterFeatures {

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var str: String?
        
let result0 = str.flatMap { Int($0) }.valueOrDefault(.min)
        
var result1: Int = .min
if let str = str {
   result1 = Int(str) ?? .min
}
// result1 can be changed here, but result0 can't. 
assert(result0 == result1)

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extension String {
    static let empty = "" // swift 5.5 allows static let constructs in extension
    
  #if DEBUG
    func check() {
        assert(Self.empty == "")
    }
  #endif
}

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import Foundation

extension Optional {
    var hasValue: Bool {
        if case .some = self {
            return true
        }
        return false
    }
    

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// MARK: - Atomic
@propertyWrapper struct Atomic<T> {
    private let lock = UnfairLock()
    
    private var value: T
    
    var wrappedValue: T {
        get {
            lock.lock()
            defer {

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// MARK: - UnfairLock
final class UnfairLock {
    private let unfairLock: os_unfair_lock_t //UnsafeMutablePointer<os_unfair_lock>
    private let unfairValue: os_unfair_lock_s
    
    init() {
        unfairLock = .allocate(capacity: 1)
        unfairValue = .init()
        unfairLock.initialize(to: unfairValue)
    }

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final class Test {
    private let queue: DispatchQueue
    private let queueKey : DispatchSpecificKey<Int>
    private let queueKeyValue: Int
    
    init() {
        let queueKey = DispatchSpecificKey<Int>()
        let queueKeyValue = Int(arc4random())
        
        self.queueKey = queueKey

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import UIView
extension UILabel {
    func markAsMultiline() {
        numberOfLines = 0
        lineBreakMode = .byWordWrapping
    }
}

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class Test1: MainThreadRunnerType {
    func displayMessage(_ text: String) {
        debugPrint(text)
    }
    
    func displayMessage(optText: String?) {
        guard let text = optText else { return }
        displayMessage(text)
    }