Swift 4.2 はどのような進化をしているのか/whats-new-swift42

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22 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Swift 1.0 Swift 1.1 Swift 1.2 Swift 2.0 Swift 3.0 Swift 4.0 Swift 4.1 2014 - 09 10 2015 - 04 09 2016 - 09 2017 - 09 2018 - 03

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48 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. SE-0197 SE-0199 SE-0202 SE-0204 SE-0205 SE-0207 SE-0210 Adding in-place removeAll(where:) to the Standard Library Adding toggle to Bool Random Unification Add last(where:) and lastIndex(where:) Methods withUnsafePointer(to:_:) and withUnsafeBytes(of:_:) for immutable values Add an allSatisfy algorithm to Sequence Add an offset(of:) method to MemoryLayout API ͷ௥Ճ / มߋ ̓ͭ

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52 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import Foundation Int(arc4random_uniform(UInt32(10))) // 0 ʙ 9 arc4random_uniform(UInt32(2)) == 0 ? true : false // true | false ൣғʢ3BOHFʣ͔Βੜ੒ Random Unification SE-0202 Swift 4.1

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53 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import Foundation Int(arc4random_uniform(UInt32(10))) // 0 ʙ 9 arc4random_uniform(UInt32(2)) == 0 ? true : false // true | false ൣғʢ3BOHFʣ͔Βੜ੒ Random Unification SE-0202 Swift 4.1 'PVOEBUJPO͕ඞཁ

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54 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import Foundation Int(arc4random_uniform(UInt32(10))) // 0 ʙ 9 arc4random_uniform(UInt32(2)) == 0 ? true : false // true | false ൣғʢ3BOHFʣ͔Βੜ੒ Random Unification SE-0202 Swift 4.1 4XJGUZͰͳ͍"1*

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55 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import Foundation Int(arc4random_uniform(UInt32(10))) // 0 ʙ 9 arc4random_uniform(UInt32(2)) == 0 ? true : false // true | false Int.random(in: 0..<10) // 0 ʙ 9 Bool.random() // true | false ൣғʢ3BOHFʣ͔Βੜ੒ Random Unification SE-0202 Swift 4.1 Swift 4.2

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56 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import Foundation Int(arc4random_uniform(UInt32(10))) // 0 ʙ 9 arc4random_uniform(UInt32(2)) == 0 ? true : false // true | false Int.random(in: 0..<10) // 0 ʙ 9 Bool.random() // true | false ൣғʢ3BOHFʣ͔Βੜ੒ Random Unification SE-0202 Swift 4.1 'PVOEBUJPOͷJNQPSU΋ෆཁʹ Swift 4.2

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58 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 4, 5] if let x = xs.randomElement() { print(x) } else { print("Array is empty.") } ഑ྻ͔ΒϥϯμϜʹཁૉΛऔಘ Random Unification SE-0202 Swift 4.2

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59 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 4, 5] if let x = xs.randomElement() { print(x) } else { print("Array is empty.") } ϥϯμϜͰཁૉΛऔಘ ഑ྻ͔ΒϥϯμϜʹཁૉΛऔಘ Random Unification SE-0202 Swift 4.2

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60 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 4, 5] if let x = xs.randomElement() { print(x) } else { print("Array is empty.") } ഑ྻ͔ΒϥϯμϜʹཁૉΛऔಘ Random Unification SE-0202 ഑ྻ͕ۭͷ৔߹͸OJM Swift 4.2

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62 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 4, 5] xs.shuffled() // [4, 5, 1, 2, 3] var ys = xs ys.shuffle() print(ys) // [3, 5, 4, 2, 1] ഑ྻΛγϟοϑϧ Random Unification SE-0202 Swift 4.2

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63 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 4, 5] xs.shuffled() // [4, 5, 1, 2, 3] var ys = xs ys.shuffle() print(ys) // [3, 5, 4, 2, 1] ഑ྻΛγϟοϑϧ Random Unification SE-0202 ৽͍͠഑ྻΛฦ͢TIV⒐FE Swift 4.2

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64 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 4, 5] xs.shuffled() // [4, 5, 1, 2, 3] var ys = xs ys.shuffle() print(ys) // [3, 5, 4, 2, 1] ഑ྻΛγϟοϑϧ Random Unification SE-0202 มߋ͢ΔTIV⒐F Swift 4.2

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69 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. view.isHidden = !view.isHidden view.isHidden.toggle() #PPM஋Λ൓స Adding toggle to Bool SE-0199 Swift 4.1 Swift 4.2

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70 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. view.isHidden = !view.isHidden view.isHidden.toggle() #PPM஋Λ൓స Adding toggle to Bool SE-0199 Swift 4.1 νΣʔϯͷ్தʹ0QUJPOBM͕͋Δ৔߹͸͞Βʹศར Swift 4.2

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72 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Bool { @inlinable public mutating func toggle() { self = !self } } ࣮૷͸ʁ Adding toggle to Bool SE-0199

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73 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Bool { @inlinable public mutating func toggle() { self = !self } } ࣮૷͸ʁ Adding toggle to Bool SE-0199 ΠϯϥΠϯԽ͞ΕΔͷͰύϑΥʔϚϯε௿Լ΋৺഑ͳ͍

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75 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ຤ඌ͔ΒཁૉΛ୳͢ϝιου͕௥Ճ 4FRVFODF • MBTU XIFSF • MBTU*OEFY XIFSF • JOEFY XIFSF ➔pSTU*OEFY XIFSF ֓ཁ Add last(where:) and lastIndex(where:) Methods SE-0204 Ұ؏ੑΛ࣋ͨͤΔͨΊมߋ

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76 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 2, 4] (xs.reversed().firstIndex(of: 2)?.base).map { xs.index(before: $0) } // Optional(3) ྫɿ࠷ޙͷʮʯͷ*OEFYΛऔಘ Add last(where:) and lastIndex(where:) Methods SE-0204 Swift 4.1

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77 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 2, 4] (xs.reversed().firstIndex(of: 2)?.base).map { xs.index(before: $0) } // Optional(3) ൓సͯ͠ʢSFWFSTFEʣ ࠷ॳͷ*OEFYͷCBTFΛऔಘͯ͠ JOEFY CFGPSF Ͱຊདྷͷ*OEFYʹ ྫɿ࠷ޙͷʮʯͷ*OEFYΛऔಘ Add last(where:) and lastIndex(where:) Methods SE-0204 Swift 4.1 ͱʹ͔͘໘౗…

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78 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 2, 4] (xs.reversed().firstIndex(of: 2)?.base).map { xs.index(before: $0) } // Optional(3) xs.lastIndex(of: 2) // Optional(3) Swift 4.1 Swift 4.2 ྫɿ࠷ޙͷʮʯͷ*OEFYΛऔಘ Add last(where:) and lastIndex(where:) Methods SE-0204

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79 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [1, 2, 3, 2, 4] (xs.reversed().firstIndex(of: 2)?.base).map { xs.index(before: $0) } // Optional(3) xs.lastIndex(of: 2) // Optional(3) Swift 4.1 ؆ܿɾ໌ྎʂ Swift 4.2 ྫɿ࠷ޙͷʮʯͷ*OEFYΛऔಘ Add last(where:) and lastIndex(where:) Methods SE-0204

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81 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ͢΂ͯͷཁૉ͕৚݅Λຬ͔ͨ͢൑ఆ͢Δ"1* 4FRVFODF • BMM4BUJTGZ QSFDPOEJUJPO #PPM ֓ཁ Add an allSatisfy algorithm to Sequence SE-0207

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82 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [2, 4, 6, 8] !xs.contains { $0 % 2 != 0 } // true ྫɿ഑ྻ಺ͷ͢΂ͯͷཁૉ͕ۮ਺͔ʁ Add an allSatisfy algorithm to Sequence SE-0207 Swift 4.1

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83 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [2, 4, 6, 8] !xs.contains { $0 % 2 != 0 } // true ྫɿ഑ྻ಺ͷ͢΂ͯͷཁૉ͕ۮ਺͔ʁ Add an allSatisfy algorithm to Sequence SE-0207 Swift 4.1 ۮ਺Ͱͳ͍ཁૉ͕

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let xs = [2, 4, 6, 8] !xs.contains { $0 % 2 != 0 } // true 84 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ྫɿ഑ྻ಺ͷ͢΂ͯͷཁૉ͕ۮ਺͔ʁ Add an allSatisfy algorithm to Sequence SE-0207 Swift 4.1 ؚ·Ε͍ͯͳ͍͜ͱ

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85 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [2, 4, 6, 8] !xs.contains { $0 % 2 != 0 } // true xs.allSatisfy { $0 % 2 == 0 } // true ྫɿ഑ྻ಺ͷ͢΂ͯͷཁૉ͕ۮ਺͔ʁ Add an allSatisfy algorithm to Sequence SE-0207 Swift 4.1 Swift 4.2

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86 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs = [2, 4, 6, 8] !xs.contains { $0 % 2 != 0 } // true xs.allSatisfy { $0 % 2 == 0 } // true ྫɿ഑ྻ಺ͷ͢΂ͯͷཁૉ͕ۮ਺͔ʁ Add an allSatisfy algorithm to Sequence SE-0207 Swift 4.1 ؆ܿɾ໌ྎʂ Swift 4.2

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88 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ৚݅Λຬͨ͢ཁૉΛ͢΂ͯআڈ͢Δ"1* 3BOHF3FQMBDFBCMF$PMMFDUJPO • SFNPWF"MM XIFSF ֓ཁ Adding in-place removeAll(where:) to the Standard Library SE-0197 ύϑΥʔϚϯε΋ྑ͍ʢin-placeʣ

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89 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. var xs = [1, 2, 3, 4] xs = xs.filter { $0 % 2 != 0 } // [1, 3] ྫɿ഑ྻ͔Βۮ਺Λ͢΂ͯऔΓআ͘ Adding in-place removeAll(where:) to the Standard Library SE-0197 Swift 4.1

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90 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. var xs = [1, 2, 3, 4] xs = xs.filter { $0 % 2 != 0 } // [1, 3] ྫɿ഑ྻ͔Βۮ਺Λ͢΂ͯऔΓআ͘ Adding in-place removeAll(where:) to the Standard Library SE-0197 Swift 4.1 ۮ਺Ͱͳ͍ཁૉΛ

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91 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. var xs = [1, 2, 3, 4] xs = xs.filter { $0 % 2 != 0 } // [1, 3] ྫɿ഑ྻ͔Βۮ਺Λ͢΂ͯऔΓআ͘ Adding in-place removeAll(where:) to the Standard Library SE-0197 Swift 4.1 औΓग़ͯ͠࠶୅ೖ

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92 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. xs.removeAll { $0 % 2 == 0 } // [1, 3] var xs = [1, 2, 3, 4] xs = xs.filter { $0 % 2 != 0 } // [1, 3] ྫɿ഑ྻ͔Βۮ਺Λ͢΂ͯऔΓআ͘ Adding in-place removeAll(where:) to the Standard Library SE-0197 Swift 4.1 Swift 4.2

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93 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. xs.removeAll { $0 % 2 == 0 } // [1, 3] var xs = [1, 2, 3, 4] xs = xs.filter { $0 % 2 != 0 } // [1, 3] ྫɿ഑ྻ͔Βۮ਺Λ͢΂ͯऔΓআ͘ Adding in-place removeAll(where:) to the Standard Library SE-0197 Swift 4.1 ؆ܿɾ໌ྎʂ Swift 4.2

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95 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. MFUͳ஋ʹରͯ͠΋௚઀ݺͼग़ͤΔΑ͏ʹ XJUI6OTBGF1PJOUFS UP@ XJUI6OTBGF#ZUFT PG@ ֓ཁ withUnsafePointer(to:_:) and withUnsafeBytes(of:_:) for immutable values SE-0205

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96 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let x = 42 var copy = x withUnsafePointer(to: &copy) { pointer in print(pointer.pointee) // 42 } XJUI6OTBGF1PJOUFS withUnsafePointer(to:_:) and withUnsafeBytes(of:_:) for immutable values SE-0205 Swift 4.1

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97 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let x = 42 var copy = x withUnsafePointer(to: &copy) { pointer in print(pointer.pointee) // 42 } XJUI6OTBGF1PJOUFS withUnsafePointer(to:_:) and withUnsafeBytes(of:_:) for immutable values SE-0205 Swift 4.1 WBSʹ୅ೖ͠௚ͯ͠

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98 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let x = 42 var copy = x withUnsafePointer(to: &copy) { pointer in print(pointer.pointee) // 42 } XJUI6OTBGF1PJOUFS withUnsafePointer(to:_:) and withUnsafeBytes(of:_:) for immutable values SE-0205 Swift 4.1 ࢀরΛ౉͢

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99 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let x = 42 var copy = x withUnsafePointer(to: &copy) { pointer in print(pointer.pointee) // 42 } withUnsafePointer(to: x) { pointer in print(pointer.pointee) // 42 } XJUI6OTBGF1PJOUFS withUnsafePointer(to:_:) and withUnsafeBytes(of:_:) for immutable values SE-0205 Swift 4.1 Swift 4.2

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100 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let x = 42 var copy = x withUnsafePointer(to: &copy) { pointer in print(pointer.pointee) // 42 } withUnsafePointer(to: x) { pointer in print(pointer.pointee) // 42 } XJUI6OTBGF1PJOUFS withUnsafePointer(to:_:) and withUnsafeBytes(of:_:) for immutable values SE-0205 Swift 4.1 ௚઀YΛ౉ͤΔΑ͏ʹ Swift 4.2

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102 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ࢦఆͨ͠ΩʔύεͷϝϞϦΦϑηοτΛऔಘ͢Δ"1* .FNPSZ-BZPVU • P⒎TFU PG ֓ཁ Add an offset(of:) method to MemoryLayout SE-0210 OpenGL ͳͲͰศརʢΒ͍͠ʣ

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103 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct Point { var x: Int var y: Int } struct Circle { var center: Point var radius: Int } MemoryLayout.offset(of: \Circle.center.x) // 0 MemoryLayout.offset(of: \Circle.center.y) // 8 MemoryLayout.offset(of: \Circle.radius) // 16 ϝϞϦͷΦϑηοτΛऔಘ Add an offset(of:) method to MemoryLayout SE-0210 Swift 4.2

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104 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct Point { var x: Int var y: Int } struct Circle { var center: Point var radius: Int } MemoryLayout.offset(of: \Circle.center.x) // 0 MemoryLayout.offset(of: \Circle.center.y) // 8 MemoryLayout.offset(of: \Circle.radius) // 16 ϝϞϦͷΦϑηοτΛऔಘ Add an offset(of:) method to MemoryLayout SE-0210 ߏ଄ମ Swift 4.2

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105 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct Point { var x: Int var y: Int } struct Circle { var center: Point var radius: Int } MemoryLayout.offset(of: \Circle.center.x) // 0 MemoryLayout.offset(of: \Circle.center.y) // 8 MemoryLayout.offset(of: \Circle.radius) // 16 ϝϞϦͷΦϑηοτΛऔಘ Add an offset(of:) method to MemoryLayout SE-0210 ,FZ1BUIͰϓϩύςΟΛࢦఆ Swift 4.2

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106 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct Point { var x: Int var y: Int } struct Circle { var center: Point var radius: Int } MemoryLayout.offset(of: \Circle.center.x) // 0 MemoryLayout.offset(of: \Circle.center.y) // 8 MemoryLayout.offset(of: \Circle.radius) // 16 ϝϞϦͷΦϑηοτΛऔಘ Add an offset(of:) method to MemoryLayout SE-0210 Swift 4.2 .FNPSZ-BZPVUP⒎TFUʹ౉͢

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107 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct Point { var x: Int var y: Int } struct Circle { var center: Point var radius: Int } MemoryLayout.offset(of: \Circle.center.x) // 0 MemoryLayout.offset(of: \Circle.center.y) // 8 MemoryLayout.offset(of: \Circle.radius) // 16 ← 0 byte ϝϞϦͷΦϑηοτΛऔಘ Add an offset(of:) method to MemoryLayout SE-0210 Point x y radius Int Int Int Circle ← 8 byte ← 16 byte

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109 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. SE-0054 SE-0143 SE-0193 SE-0194 SE-0195 SE-0196 SE-0206 SE-0212 Abolish ImplicitlyUnwrappedOptional type Conditional conformances Cross-module inlining and specialization Derived Collection of Enum Cases Introduce User-defined "Dynamic Member Lookup" Types Compiler Diagnostic Directives Hashable Enhancements Compiler Version Directive ݴޠ࢓༷ 8ͭ

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111 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. )BTIBCMFϓϩτίϧͷ࣮૷ํ๏͕มߋ 4XJGU • IBTI7BMVF 4XJGU • IBTI JOUPIBTIFSJOPVU)BTIFS ֓ཁ Hashable Enhancements SE-0206

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112 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. )BTIBCMFϓϩτίϧͷ࣮૷ํ๏͕มߋ 4XJGU • IBTI7BMVF 4XJGU • IBTI JOUPIBTIFSJOPVU)BTIFS ֓ཁ Hashable Enhancements SE-0206

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113 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. class Person: Hashable { let name: String let age: Int init(name: String, age: Int) { self.name = name self.age = age } static func == (lhs: Person, rhs: Person) -> Bool { return lhs.name == rhs.name && lhs.age == rhs.age } } ྫɿ1FSTPOΫϥεʹ)BTIBCMFΛద߹ Hashable Enhancements SE-0206 Swift 4.2

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114 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. class Person: Hashable { let name: String let age: Int init(name: String, age: Int) { self.name = name self.age = age } static func == (lhs: Person, rhs: Person) -> Bool { return lhs.name == rhs.name && lhs.age == rhs.age } } ྫɿ1FSTPOΫϥεʹ)BTIBCMFΛద߹ Hashable Enhancements SE-0206 &RVBUBCMF΁ͷ४ڌ΋ඞཁ Swift 4.2

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115 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Person: Hashable { var hashValue: Int { return name.hashValue ^ age.hashValue &* 42 } } Swift 4.1 ྫɿ1FSTPOΫϥεʹ)BTIBCMFΛద߹ Hashable Enhancements SE-0206

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extension Person: Hashable { var hashValue: Int { return name.hashValue ^ age.hashValue &* 42 } } 116 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Swift 4.1 Hashable Enhancements SE-0206 ྫɿ1FSTPOΫϥεʹ)BTIBCMFΛద߹ ࣗલͰϋογϡ஋Λܭࢉ͢Δඞཁ͕͋ͬͨ

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extension Person: Hashable { var hashValue: Int { return name.hashValue ^ age.hashValue &* 42 } } 117 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Person: Hashable { func hash(into hasher: inout Hasher) { hasher.combine(name) hasher.combine(age) } } ྫɿ1FSTPOΫϥεʹ)BTIBCMFΛద߹ Hashable Enhancements SE-0206 Swift 4.1 Swift 4.2

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extension Person: Hashable { var hashValue: Int { return name.hashValue ^ age.hashValue &* 42 } } 118 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Person: Hashable { func hash(into hasher: inout Hasher) { hasher.combine(name) hasher.combine(age) } } ྫɿ1FSTPOΫϥεʹ)BTIBCMFΛద߹ Hashable Enhancements SE-0206 Swift 4.1 Swift 4.2 ϋογϡ஋Λܭࢉ͢ΔΦϒδΣΫτ

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extension Person: Hashable { var hashValue: Int { return name.hashValue ^ age.hashValue &* 42 } } 119 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Person: Hashable { func hash(into hasher: inout Hasher) { hasher.combine(name) hasher.combine(age) } } ྫɿ1FSTPOΫϥεʹ)BTIBCMFΛద߹ Hashable Enhancements SE-0206 Swift 4.1 DPNCJOFΛݺΜͰ͍͚͹0, Swift 4.2

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123 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. enum Signal { case blue case yellow case red } extension Signal { static var all: [Signal] { return [.blue, .yellow, .red] } static var count: Int { return all.count } } Signal.all // [.blue, .yellow, .red] Signal.all.count // 3 FOVNͷྻڍʢ4XJGUʣ Derived Collection of Enum Cases SE-0194 Swift 4.1

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124 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. enum Signal { case blue case yellow case red } extension Signal { static var all: [Signal] { return [.blue, .yellow, .red] } static var count: Int { return all.count } } Signal.all // [.blue, .yellow, .red] Signal.all.count // 3 FOVNͷྻڍʢ4XJGUʣ Derived Collection of Enum Cases SE-0194 BMMͱDPVOUΛࣗ෼Ͱ࣮૷ Swift 4.1

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125 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. enum Signal { case blue case yellow case red } extension Signal { static var all: [Signal] { return [.blue, .yellow, .red] } static var count: Int { return all.count } } Signal.all // [.blue, .yellow, .red] Signal.all.count // 3 FOVNͷྻڍʢ4XJGUʣ Derived Collection of Enum Cases SE-0194 मਖ਼࿙Ε͕ൃੜ͢ΔՄೳੑʜ Swift 4.1

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127 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. enum Signal: CaseIterable { case blue case yellow case red } Signal.allCases // [.blue, .yellow, .red] Signal.allCases.count // 3 FOVNͷྻڍʢ4XJGUʣ Derived Collection of Enum Cases SE-0194 Swift 4.2

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128 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. enum Signal: CaseIterable { case blue case yellow case red } Signal.allCases // [.blue, .yellow, .red] Signal.allCases.count // 3 FOVNͷྻڍʢ4XJGUʣ Derived Collection of Enum Cases SE-0194 $BTF*UFSBCMFΛ࣮૷ Swift 4.2

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129 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. enum Signal: CaseIterable { case blue case yellow case red } Signal.allCases // [.blue, .yellow, .red] Signal.allCases.count // 3 FOVNͷྻڍʢ4XJGUʣ Derived Collection of Enum Cases SE-0194 BMM$BTFTͰྻڍͰ͖Δʂ Swift 4.2

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130 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. FOVNͷྻڍʢ4XJGUʣ Derived Collection of Enum Cases SE-0194 • FOVNʹBTTPDJBUFEWBMVFT͕͋Δ৔߹͸  BMM$BTFTΛࣗ෼Ͱ࣮૷͢Δඞཁ͋Γ enum Signal: CaseIterable { case blue case yellow case red } Signal.allCases // [.blue, .yellow, .red] Signal.allCases.count // 3 Swift 4.2

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132 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. enum Week: String, CaseIterable { case sunday, monday, tuesday, wednesday, thursday, friday, saturday static var allCases: [Week] { return [.sunday, .saturday] } } Week.allCases.map { $0.rawValue } // [.sunday, .saturday] BMM$BTFTͷΧελϚΠζ Derived Collection of Enum Cases SE-0194 Swift 4.2

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enum Week: String, CaseIterable { case sunday, monday, tuesday, wednesday, thursday, friday, saturday static var allCases: [Week] { return [.sunday, .saturday] } } Week.allCases.map { $0.rawValue } // [.sunday, .saturday] 133 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. BMM$BTFTͷΧελϚΠζ Derived Collection of Enum Cases SE-0194 BMM$BTFTΛ࣮૷ͯ͠഑ྻΛฦ͢ Swift 4.2

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135 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ίϯύΠϧஈ֊Ͱ֬ఆͯ͠ͳ͍ϓϩύςΟʹ  υοτه๏ͰΞΫηεͰ͖Δ࢓૊Έ ֓ཁ Introduce User-defined "Dynamic Member Lookup" Types SE-0195 %ZOBNJD.FNCFS-PPLVQ • $ISJT-BUUOFS͕ఏҊɾ࣮૷ • +40/΍֎෦ݴޠͷݺͼग़͠ʢ''*ʣͳͲʹ

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137 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @dynamicMemberLookup struct Plist { let plist = [ “version" : "1.0" ] subscript(dynamicMember key: String) -> String { return plist[key] ?? "-" } } let plist = Plist() plist.version // 1.0 plist.name // - ྫɿQMJTUʹ҆શʹΞΫηε Introduce User-defined "Dynamic Member Lookup" Types SE-0195 Swift 4.2

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138 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @dynamicMemberLookup struct Plist { let plist = [ “version" : "1.0" ] subscript(dynamicMember key: String) -> String { return plist[key] ?? "-" } } let plist = Plist() plist.version // 1.0 plist.name // - ྫɿQMJTUʹ҆શʹΞΫηε Introduce User-defined "Dynamic Member Lookup" Types SE-0195 ଐੑΛఆٛ Swift 4.2

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139 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @dynamicMemberLookup struct Plist { let plist = [ “version" : "1.0" ] subscript(dynamicMember key: String) -> String { return plist[key] ?? "-" } } let plist = Plist() plist.version // 1.0 plist.name // - ྫɿQMJTUʹ҆શʹΞΫηε Introduce User-defined "Dynamic Member Lookup" Types SE-0195 EZOBNJD.FNCFS Swift 4.2

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140 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @dynamicMemberLookup struct Plist { let plist = [ “version" : "1.0" ] subscript(dynamicMember key: String) -> String { return plist[key] ?? "-" } } let plist = Plist() plist.version // 1.0 plist.name // - ྫɿQMJTUʹ҆શʹΞΫηε Introduce User-defined "Dynamic Member Lookup" Types SE-0195 ରԠ͢ΔΩʔ͕ແ͔ͬͨΒσϑΥϧτ஋ Swift 4.2

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141 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @dynamicMemberLookup struct Plist { let plist = [ “version" : "1.0" ] subscript(dynamicMember key: String) -> String { return plist[key] ?? "-" } } let plist = Plist() plist.version // 1.0 plist.name // - ྫɿQMJTUʹ҆શʹΞΫηε Introduce User-defined "Dynamic Member Lookup" Types SE-0195 ϓϩύςΟͷΑ͏ʹΞΫηεͰ͖Δ Swift 4.2

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144 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. // import pickle let pickle = Python.get(member: "import")("pickle") // file = open(filename) let file = Python.get(member: "open")(filename) // blob = file.read() let blob = file.get(member: "read")() // result = pickle.loads(blob) let result = pickle.get(member: "loads")(blob) 4XJGU Introduce User-defined "Dynamic Member Lookup" Types SE-0195

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145 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. // import pickle let pickle = Python.get(member: "import")("pickle") // file = open(filename) let file = Python.get(member: "open")(filename) // blob = file.read() let blob = file.get(member: "read")() // result = pickle.loads(blob) let result = pickle.get(member: "loads")(blob) 4XJGU Introduce User-defined "Dynamic Member Lookup" Types SE-0195 ϝιουͳͲΛ͢΂ͯจࣈྻͰࢦఆ

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147 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. // import pickle let pickle = Python.import("pickle") // file = open(filename) let file = Python.open(filename) // blob = file.read() let blob = file.read() // result = pickle.loads(blob) let result = pickle.loads(blob) 4XJGU Introduce User-defined "Dynamic Member Lookup" Types SE-0195

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148 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. // import pickle let pickle = Python.import("pickle") // file = open(filename) let file = Python.open(filename) // blob = file.read() let blob = file.read() // result = pickle.loads(blob) let result = pickle.loads(blob) 4XJGU Introduce User-defined "Dynamic Member Lookup" Types SE-0195 ݩͷ1ZUIPOίʔυͱ΄΅ಉ͡ʹ

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150 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. *60ܕɹ➔ɹ*60ଐੑ *NQMJDJUMZ6OXSBQQFE0QUJPOBMܕ • ҉໧తΞϯϥοϓܕʢFY4USJOHʣ • 4XJGUY͔Β։࢝͞Εͨ • 0QUJPOBMܕʹ౷Ұ ֓ཁ Abolish ImplicitlyUnwrappedOptional type SE-0054 4.2 Ͱ׬શഇࢭʂ

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151 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. *60ܕɹ➔ɹ*60ଐੑ ϝϦοτ • ίϯύΠϥ࣮૷͕γϯϓϧʹͳΔ • 4XJGUར༻ऀʹͱͬͯ͸΄΅Өڹ͕ͳ͍ ֓ཁ Abolish ImplicitlyUnwrappedOptional type SE-0054 Β͍͠

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153 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs: [Int!] = [1, 2, 3] type(of: xs) // Array>.Type <*OU>ͷܕ͸Կ͔ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 Swift 4.1

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154 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs: [Int!] = [1, 2, 3] type(of: xs) // Array>.Type <*OU>ͷܕ͸Կ͔ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 Swift 4.1 *NQMJDJUMZ6OXSBQQFE0QUJPOBM*OU

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155 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs: [Int!] = [1, 2, 3] type(of: xs) // Array>.Type type(of: xs) // Array>.Type <*OU>ͷܕ͸Կ͔ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 Swift 4.1 Swift 4.2

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156 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs: [Int!] = [1, 2, 3] type(of: xs) // Array>.Type type(of: xs) // Array>.Type <*OU>ͷܕ͸Կ͔ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 Swift 4.1 0QUJPOBM*OU Swift 4.2

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157 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let xs: [Int!] = [1, 2, 3] type(of: xs) // Array>.Type type(of: xs) // Array>.Type <*OU>ͷܕ͸Կ͔ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 Swift 4.1 Swift 4.2 • ɹ*NQMJDJUMZ6OXSBQQFE0QUJPOBM*OU • ɹ0QUJPOBM*OU

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159 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @implicitlyUnwrappedOptional let xs: Int? = 42 *60ଐੑͱ͸ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 Swift 4.2

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160 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @implicitlyUnwrappedOptional let xs: Int? = 42 *60ଐੑͱ͸ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 ͜͏͍͏ଐੑ͕෇༩͞Εͯ Swift 4.2

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161 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @implicitlyUnwrappedOptional let xs: Int? = 42 *60ଐੑͱ͸ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 ܕ͸0QUJPOBM*OU Swift 4.2

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162 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. @implicitlyUnwrappedOptional let xs: Int? = 42 *60ଐੑͱ͸ʁ Abolish ImplicitlyUnwrappedOptional type SE-0054 ίϯύΠϥ಺෦ଐੑͳͷͰఆٛෆՄ Swift 4.2

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164 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ৚݅෇͖ͷϓϩτίϧద߹ 4XJGUɹಋೖ 4XJGUɹվળ • ࣮ߦ࣌ͷϓϩτίϧద߹൑ఆ • ഑ྻ΍σΟΫγϣφϦ͕)BTIBCMFʹద߹ ֓ཁ Conditional conformances SE-0143

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166 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Array: Equatable where Element: Equatable { } $POEJUJPOBM$POGPSNBODFT Conditional conformances SE-0143 Swift 4.2

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167 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Array: Equatable where Element: Equatable { } $POEJUJPOBM$POGPSNBODFT Conditional conformances SE-0143 ཁૉͷܕ͕&RVBUBCMFͳ৔߹ʹ Swift 4.2

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168 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Array: Equatable where Element: Equatable { } $POEJUJPOBM$POGPSNBODFT Conditional conformances SE-0143 "SSBZΛ&RVBUBCMFʹ४ڌ Swift 4.2

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169 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. extension Array: Equatable where Element: Equatable { } $POEJUJPOBM$POGPSNBODFT Conditional conformances SE-0143 4XJGU͔ΒͰ͖ΔΑ͏ʹͳͬͨ Swift 4.2

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171 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. protocol Drinkable { func drink() } struct Curry: Drinkable { func drink() { print("ΧϨʔ͸ҿΈ෺ʂ") } } extension Array: Drinkable where Element: Drinkable { func drink() { for x in self { x.drink() } } } ྫɿཁૉ͕ʮҿΊΔʯͳΒ͹શମͱͯ͠΋ʮҿΊΔʯ Conditional conformances SE-0143 Swift 4.2

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172 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. protocol Drinkable { func drink() } struct Curry: Drinkable { func drink() { print("ΧϨʔ͸ҿΈ෺ʂ") } } extension Array: Drinkable where Element: Drinkable { func drink() { for x in self { x.drink() } } } ྫɿཁૉ͕ʮҿΊΔʯͳΒ͹શମͱͯ͠΋ʮҿΊΔʯ Conditional conformances SE-0143 ʮҿΊΔʯΛදݱ͢Δϓϩτίϧ

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173 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. protocol Drinkable { func drink() } struct Curry: Drinkable { func drink() { print("ΧϨʔ͸ҿΈ෺ʂ") } } extension Array: Drinkable where Element: Drinkable { func drink() { for x in self { x.drink() } } } ྫɿཁૉ͕ʮҿΊΔʯͳΒ͹શମͱͯ͠΋ʮҿΊΔʯ Conditional conformances SE-0143 ΧϨʔ͸΋ͪΖΜʮҿΈ෺ʯ

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174 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. protocol Drinkable { func drink() } struct Curry: Drinkable { func drink() { print("ΧϨʔ͸ҿΈ෺ʂ") } } extension Array: Drinkable where Element: Drinkable { func drink() { for x in self { x.drink() } } } ྫɿཁૉ͕ʮҿΊΔʯͳΒ͹શମͱͯ͠΋ʮҿΊΔʯ Conditional conformances SE-0143 ΧϨʔࡼ͕ʮҿΈ෺ʯͰ͋Ε͹ɺԿࡼͰ΋ʮҿΈ෺ʯ

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175 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let items: Any = [Curry(), Curry(), Curry()] if let drinks = items as? Drinkable { drinks.drink() } ࣮ߦ࣌ʹ1SPUPDPM΁ͷ४ڌΛ൑ఆ Conditional conformances SE-0143 Swift 4.1

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176 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let items: Any = [Curry(), Curry(), Curry()] if let drinks = items as? Drinkable { drinks.drink() } ࣮ߦ࣌ʹ1SPUPDPM΁ͷ४ڌΛ൑ఆ Conditional conformances SE-0143 Swift 4.1 <$VSSZ>Λ"OZͰએݴ

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177 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let items: Any = [Curry(), Curry(), Curry()] if let drinks = items as? Drinkable { drinks.drink() } ࣮ߦ࣌ʹ1SPUPDPM΁ͷ४ڌΛ൑ఆ Conditional conformances SE-0143 Swift 4.1 %SJOLBCMFʹ४ڌ͍ͯ͠Δ͔ʁ

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178 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let items: Any = [Curry(), Curry(), Curry()] if let drinks = items as? Drinkable { drinks.drink() } ࣮ߦ࣌ʹ1SPUPDPM΁ͷ४ڌΛ൑ఆ Conditional conformances SE-0143 Swift 4.1 warning: Swift runtime does not yet support dynamically querying conditional conformance Ͱ͸ਖ਼͘͠൑ఆͰ͖ͳ͔ͬͨ

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let items: Any = [Curry(), Curry(), Curry()] if let drinks = items as? Drinkable { drinks.drink() } // ΧϨʔ͸ҿΈ෺ʂ // ΧϨʔ͸ҿΈ෺ʂ // ΧϨʔ͸ҿΈ෺ʂ 179 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ࣮ߦ࣌ʹ1SPUPDPM΁ͷ४ڌΛ൑ఆ Conditional conformances SE-0143 Ͱ͸ҿΊΔΑ͏ʹʂ Swift 4.2

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181 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct User: Hashable { var name: String var pets: [String] } ྫɿߏ଄ମ΁ͷ)BTIBCMFద߹ Conditional conformances SE-0143 Swift 4.1

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182 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct User: Hashable { var name: String var pets: [String] } • <4USJOH>͕)BTIBCMFʹద߹͍ͯ͠ͳ͍ ྫɿߏ଄ମ΁ͷ)BTIBCMFద߹ Conditional conformances SE-0143 ❌ͩͱίϯύΠϧΤϥʔ Swift 4.1

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183 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. struct User: Hashable { var name: String var pets: [String] } • ཁૉ͕)BTIBCMFͰ͋Ε͹ɺ഑ྻ΋)BTIBCMFʹద߹ • 0QUJPOBMɺ%JDUJPOBSZɺ3BOHFͳͲʹ͍ͭͯ΋ಉ༷ ྫɿߏ଄ମ΁ͷ)BTIBCMFద߹ Conditional conformances SE-0143 ⭕ͳΒ͜ͷ··Ͱ0,ʂ Swift 4.2

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186 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. #warning("औಘͨ͠APIΩʔΛઃఆ͍ͯͩ͘͠͞ɻ") let apiKey = "" #error("ίʔϧόοΫURLΛઃఆ͢Δඞཁ͕͋Γ·͢ɻ") let callbackURL = "" ίϯύΠϥɾσΟϨΫςΟϒ Compiler Diagnostic Directives SE-0196 Swift 4.2

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187 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. #warning("औಘͨ͠APIΩʔΛઃఆ͍ͯͩ͘͠͞ɻ") let apiKey = "" #error("ίʔϧόοΫURLΛઃఆ͢Δඞཁ͕͋Γ·͢ɻ") let callbackURL = "" ίϯύΠϥɾσΟϨΫςΟϒ Compiler Diagnostic Directives SE-0196 XBSOJOHͰܯࠂ Swift 4.2

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188 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. #warning("औಘͨ͠APIΩʔΛઃఆ͍ͯͩ͘͠͞ɻ") let apiKey = "" #error("ίʔϧόοΫURLΛઃఆ͢Δඞཁ͕͋Γ·͢ɻ") let callbackURL = "" ίϯύΠϥɾσΟϨΫςΟϒ Compiler Diagnostic Directives SE-0196 FSSPSͰίϯύΠϧΤϥʔ Swift 4.2

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189 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ίϯύΠϥɾσΟϨΫςΟϒ Compiler Diagnostic Directives SE-0196 #warning("औಘͨ͠APIΩʔΛઃఆ͍ͯͩ͘͠͞ɻ") let apiKey = "" #error("ίʔϧόοΫURLΛઃఆ͢Δඞཁ͕͋Γ·͢ɻ") let callbackURL = "" ར༻ྫɿαϯϓϧίʔυʹهड़ Swift 4.2

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194 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. #if swift(>=4.1) || (swift(>=3.3) && !swift(>=4.0)) // ίϯύΠϥ 4.1 Ҏ্Ͱ༗ޮͳίʔυ #endif Compiler Version Directive SE-0212 4XJGUίϯύΠϥΛ൑ఆ Swift --swift-version 3 --swift-version 4 4.0 3.2 4.0 4.1 3.3 4.1 4.2 3.4 4.1.5 Swift 4.2

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195 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. #if swift(>=4.1) || (swift(>=3.3) && !swift(>=4.0)) // ίϯύΠϥ 4.1 Ҏ্Ͱ༗ޮͳίʔυ #endif Compiler Version Directive SE-0212 Swift --swift-version 3 --swift-version 4 4.0 3.2 4.0 4.1 3.3 4.1 4.2 3.4 4.1.5 4XJGUίϯύΠϥΛ൑ఆ ޓ׵Ϟʔυ΋ؚΊͨ4XJGUόʔδϣϯͰ൑ఆ Swift 4.2

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197 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. #if compiler(>=4.2) // ίϯύΠϥ 4.2 Ҏ্Ͱ༗ޮͳίʔυ #endif Compiler Version Directive SE-0212 4XJGUίϯύΠϥΛ൑ఆ Swift 4.2

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198 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. #if compiler(>=4.2) // ίϯύΠϥ 4.2 Ҏ্Ͱ༗ޮͳίʔυ #endif Compiler Version Directive SE-0212 ίϯύΠϥͷόʔδϣϯͰ൑ఆͰ͖Δ 4XJGUίϯύΠϥΛ൑ఆ Swift 4.2

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200 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ϞδϡʔϧؒͷΠϯϥΠϯԽΛࢦఆͰ͖ΔΑ͏ʹ ͭͷଐੑ͕௥Ճ • !JOMJOBCMF • !VTBCMF'SPN*OMJOF Cross-module inlining and specialization SE-0193 ֓ཁ ࠓ·Ͱ͸Ϟδϡʔϧ಺ͷΈ

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202 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. func add(_ x: Int, _ y: Int) -> Int { return x + y } add(1, 2) ΠϯϥΠϯԽ Cross-module inlining and specialization SE-0193 Swift 4.2

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func add(_ x: Int, _ y: Int) -> Int { return x + y } add(1, 2) 203 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ΠϯϥΠϯԽ Cross-module inlining and specialization SE-0193 ؔ਺ݺͼग़͠ͷΦʔόʔϔουֻ͕͔Δ Swift 4.2

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func add(_ x: Int, _ y: Int) -> Int { return x + y } add(1, 2) 204 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ΠϯϥΠϯԽ 1 + 2 Cross-module inlining and specialization SE-0193 Swift 4.2 Swift 4.2

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func add(_ x: Int, _ y: Int) -> Int { return x + y } add(1, 2) 205 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. ΠϯϥΠϯԽ 1 + 2 Cross-module inlining and specialization SE-0193 Swift 4.2 Swift 4.2 ؔ਺ͷຊମίʔυΛల։

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207 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. public class Counter { @usableFromInline var count: Int = 0 public init() {} @inlinable public func add() -> Int { count += 1 return count } } !JOMJOBCMF Cross-module inlining and specialization SE-0193 Swift 4.2

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208 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. public class Counter { @usableFromInline var count: Int = 0 public init() {} @inlinable public func add() -> Int { count += 1 return count } } !JOMJOBCMF Cross-module inlining and specialization SE-0193 ؔ਺ͷΠϯϥΠϯԽΛએݴ Swift 4.2

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209 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. public class Counter { @usableFromInline var count: Int = 0 public init() {} @inlinable public func add() -> Int { count += 1 return count } } !JOMJOBCMF Cross-module inlining and specialization SE-0193 !JOMJOBCMFͳؔ਺͔Βར༻͞ΕΔ৔߹ʹඞཁ Swift 4.2

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210 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. public class Counter { @usableFromInline var count: Int = 0 public init() {} @inlinable public func add() -> Int { count += 1 return count } } !JOMJOBCMF • Ϟδϡʔϧ֎͔Βݺͼग़ͨ࣌͠ʹΠϯϥΠϯԽΛڐՄ • ࣮ࡍʹΠϯϥΠϯԽ͞ΕΔ͔͸ίϯύΠϥґଘ Cross-module inlining and specialization SE-0193 Swift 4.2

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212 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Swift Package Manager 3ͭ SE-0201 SE-0208 SE-0209 Package Manager Local Dependencies Package Manager System Library Targets Package Manager Swift Language Version API Update

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214 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. -PDBMύε΋ґଘؔ܎ͰࢦఆͰ͖ΔΑ͏ʹ QBDLBHF QBUI ֓ཁ Package Manager Local Dependencies SE-0201 ࠓ·Ͱ͸ϦϞʔτ΁ͷUP͕ඞཁͩͬͨ

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215 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import PackageDescription let package = Package( name: "Package", dependencies: [ .package(path: "/path/to/MyPackage", from: "1.0.0"), ], ... ) -PDBMύεʹ͋ΔґଘΛࢦఆ Package Manager Local Dependencies SE-0201 Swift 4.2

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216 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import PackageDescription let package = Package( name: "Package", dependencies: [ .package(path: "/path/to/MyPackage", from: "1.0.0"), ], ... ) -PDBMύεʹ͋ΔґଘΛࢦఆ Package Manager Local Dependencies SE-0201 -PDBMύεΛࢦఆՄೳʹ Swift 4.2

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218 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. TXJGU-BOHVBHF7FSTJPOTͷࢦఆ͕&OVNʹ 4XJGU • *OUͰࢦఆ 4XJGU • 4XJGU7FSTJPOͰࢦఆ ֓ཁ Package Manager Swift Language Version API Update SE-0209

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219 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. TXJGU-BOHVBHF7FSTJPOTͷࢦఆ͕&OVNʹ 4XJGU • *OUͰࢦఆ 4XJGU • 4XJGU7FSTJPOͰࢦఆ ֓ཁ Package Manager Swift Language Version API Update SE-0209 Enum

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220 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let package = Package( ... swiftLanguageVersions: [4] ) TXJGU-BOHVBHF7FSTJPOT Swift 4.1 Package Manager Swift Language Version API Update SE-0209

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221 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let package = Package( ... swiftLanguageVersions: [4] ) Swift 4.1 TXJGU-BOHVBHF7FSTJPOT Package Manager Swift Language Version API Update SE-0209 *OUͷ഑ྻͰࢦఆ͍ͯͨ͠

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222 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let package = Package( ... swiftLanguageVersions: [.v4_2, .version("5.0")] ) let package = Package( ... swiftLanguageVersions: [4] ) Swift 4.1 TXJGU-BOHVBHF7FSTJPOT Package Manager Swift Language Version API Update SE-0209 Swift 4.2

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223 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. let package = Package( ... swiftLanguageVersions: [.v4_2, .version("5.0")] ) let package = Package( ... swiftLanguageVersions: [4] ) Swift 4.1 TXJGU-BOHVBHF7FSTJPOT Package Manager Swift Language Version API Update SE-0209 FOVNͷ഑ྻͰࢦఆ͢ΔΑ͏ʹ Swift 4.2

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225 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. γεςϜϥΠϒϥϦͷґଘࢦఆ͕มߋ 4XJGU • 1BDLBHFͱͯ͠෼ׂ͕ඞཁ 4XJGU • 5BSHFUͱͯ͠ࢦఆ ֓ཁ Package Manager System Library Targets SE-0208

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226 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. γεςϜϥΠϒϥϦͷґଘࢦఆ͕มߋ 4XJGU • 1BDLBHFͱͯ͠෼ׂ͕ඞཁ 4XJGU • 5BSHFUͱͯ͠ࢦఆ ֓ཁ Package Manager System Library Targets SE-0208

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228 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. γεςϜϥΠϒϥϦͷࢦఆ libxml2 Clibxml Main Swift 4.1 Package Manager System Library Targets SE-0208 ؒʹύοέʔδ͕ඞཁ

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229 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. γεςϜϥΠϒϥϦͷࢦఆ libxml2 Clibxml Main libxml2 Main Swift 4.1 Swift 4.2 Package Manager System Library Targets SE-0208

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230 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. γεςϜϥΠϒϥϦͷࢦఆ libxml2 Clibxml Main libxml2 Main Swift 4.1 Swift 4.2 Package Manager System Library Targets SE-0208 5BSHFUͰ௚઀ࢦఆ

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231 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import PackageDescription let package = Package( ... targets: [ .systemLibrary( name: "CLibxml", pkgConfig: "libxml2" ) ] ) γεςϜϥΠϒϥϦͷࢦఆ Package Manager System Library Targets SE-0208 Swift 4.2

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232 Copyright (C) DeNA Co.,Ltd. All Rights Reserved. Copyright (C) DeNA Co.,Ltd. All Rights Reserved. import PackageDescription let package = Package( ... targets: [ .systemLibrary( name: "CLibxml", pkgConfig: "libxml2" ) ] ) γεςϜϥΠϒϥϦͷࢦఆ Package Manager System Library Targets SE-0208 5BSHFUͰ௚઀ࢦఆ Swift 4.2