よせあつめSwift - Swift5.9

WWDC23(Appleの開発者向けカンファレンス) で発表されたプログラミング言語Swift5.9を新機能を中心に紹介。

Transcript

1. Αͤ͋ͭΊ4XJGU
   4XJGU
   ೳొཁ !OPUPSPJE
   J1IPOFΞϓϦ։ൃऀ೥݄೔
   

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2. ࿩͢಺༰
   w 4XJGUͷ৽ػೳ
   w 4XJGU.BDSP͸৽ػೳ
   w 0CTFSWBUJPOGSBNFXPSL
   

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3. ࿩͞ͳ͍಺༰
   w ฒߦੑ $PODVSSFODZ
   ͷػೳڧԽ
   w 5BTL(SPVQͷछྨ௥Ճ ݁ՌΛอ࣋͠ͳ͍άϧʔϓԽ͞ΕͨλεΫ
   
   w λεΫͷ༏ઌ౓্֨͛ػೳ
   w λεΫ಺ͷ؀ڥม਺ڞ༗ػೳ
   w ฒߦੑ࣌ͷಈ࡞τϨʔε
   

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4. ͓୊໨
   w վળ͢͢Ή4XJGUݴޠ
   w ৽ػೳᶃʙᶅ
   w ৽ػೳ 4XJGUNBDSPT
   w 0CTFSWBUJPOͷαϯϓϧ
   w ·ͱΊ
   

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5. վળ͢͢Ή4XJGUݴޠ
   

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6. 88%$ऴΘΓ·ͨ͠Ͷ
   

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7. ڈ೥͸4XJGUͷ଍
   Ի͕ฉ͍͑ͯͨ͜͸
   ͕ͣͩʜ
   IUUQTEFWFMPQFSBQQMFDPN
   XXED
   

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8. 4XJGUݴޠ͸ΑΓ͔͸
   ৽ػೳ௥Ճ͸௿ௐ
   

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9. 8IBU`TOFXJO4XJGU88%$
   IUUQTEFWFMPQFSBQQMFDPNXXED
   

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10. 8IBU`TOFXJO4XJGU88%$
    IUUQTEFWFMPQFSBQQMFDPNXXED
    ϓϩδΣΫτશମͷऔΓ૊Έ
    ৽ػೳᶃJGFMTF TXJUDIΛࣜͱͯ͠࢖༻Մೳʹ
    ৽ػೳᶄܕύϥϝʔλʔͷύοέʔδରԠ
    4XJGUͷੑೳ໘޲্ͷ࿩
    ৽ػೳ 4XJGU"UUSJCVUFT͕ఏڙ͍ͯͨ͠ػೳΛϓ
    ϥάΠϯͱͯ͠ར༻Մೳʹ
    ੑೳ໘޲্ͨ͠4XJGUΛ࢖ͬͯϑϨʔϜϫʔΫΛ࡮৽த
    ৽ػೳᶅDMBTTͰͰ͖Δ͜ͱΛTUSVDUʹ೚͍ͤͨ
    ৽ػೳᶇฒߦੑͷॊೈੑΛڧԽ
    ˢͷ࠾༻ྫ
    ৽ػೳᶆ$޲͚ͷίʔυδΣωϨʔλʔ
    

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11. 8IBU`TOFXJO4XJGU88%$
    IUUQTEFWFMPQFSBQQMFDPNXXED
    ৽ػೳᶃJGFMTF TXJUDIΛࣜͱͯ͠࢖༻Մೳʹ
    ৽ػೳᶄܕύϥϝʔλʔͷύοέʔδରԠ
    ৽ػೳ 4XJGU"UUSJCVUFT͕ఏڙ͍ͯͨ͠ػೳΛϓ
    ϥάΠϯͱͯ͠ར༻Մೳʹ
    ৽ػೳᶅDMBTTͰͰ͖Δ͜ͱΛTUSVDUʹ೚͍ͤͨ
    ৽ػೳᶇฒߦੑͷॊೈੑΛڧԽ
    ৽ػೳᶆ$޲͚ͷίʔυδΣωϨʔλʔ
    

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12. 8IBU`TOFXJO4XJGU88%$
    IUUQTEFWFMPQFSBQQMFDPNXXED
    ৽ػೳᶃJGFMTF TXJUDIΛࣜͱͯ͠࢖༻Մೳʹ
    ৽ػೳᶄܕύϥϝʔλʔͷύοέʔδରԠ
    ৽ػೳ 4XJGU"UUSJCVUFT͕ఏڙ͍ͯͨ͠ػೳΛϓ
    ϥάΠϯͱͯ͠ར༻Մೳʹ
    ৽ػೳᶅDMBTTͰͰ͖Δ͜ͱΛTUSVDUʹ೚͍ͤͨ
    ৽ػೳᶇฒߦੑͷॊೈੑΛڧԽ
    ৽ػೳᶆ$޲͚ͷίʔυδΣωϨʔλʔ
    

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13. 8IBU`TOFXJO4XJGU88%$
    IUUQTEFWFMPQFSBQQMFDPNXXED
    ৽ػೳᶃJGFMTF TXJUDIΛࣜͱͯ͠࢖༻Մೳʹ
    ৽ػೳᶄܕύϥϝʔλʔͷύοέʔδରԠ
    ৽ػೳ 4XJGU"UUSJCVUFT͕ఏڙ͍ͯͨ͠ػೳΛϓ
    ϥάΠϯͱͯ͠ར༻Մೳʹ
    ৽ػೳᶅDMBTTͰͰ͖Δ͜ͱΛTUSVDUʹ೚͍ͤͨ
    ৽ػೳᶇฒߦੑͷॊೈੑΛڧԽ
    ৽ػೳᶆ$޲͚ͷίʔυδΣωϨʔλʔ
    ৽ػೳʙЋΛͬ͘͟Γઆ໌͍ͨ͠ɻ
    

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14. ৽ػೳᶃ
    JGFMTF TXJUDIΛࣜͱͯ͠࢖༻Մೳʹ
    

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15. 6TJOHJGFMTFBOETXJUDITUBUFNFOUTBTFYQSFTTJPOT
    JGFMTFTXJUDIεςʔτϝϯτΛࣜͱͯ͠ѻ͏͜ͱ͕Ͱ͖Δ
    enum Status: CaseIterable {
    
    case sleep
    
    case active
    
    case playingGame
    
    
    
    var description: String {
    
    switch self {
    
    case .active: return "ΞΫςΟϒ"
    
    case .sleep: return "ਭ຾"
    
    case .playingGame: return "ήʔϜத"
    
    }
    
    }
    
    }
    ྫFOVN4UBUVTʹઆ໌Λ෇Ճ͢ΔEFTDSJQUJPOଐੑΛ௥Ճ͢Δɻ
    

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16. 6TJOHJGFMTFBOETXJUDITUBUFNFOUTBTFYQSFTTJPOT
    JGFMTFTXJUDIεςʔτϝϯτΛࣜͱͯ͠ѻ͏͜ͱ͕Ͱ͖Δ
    enum Status: CaseIterable {
    
    case sleep
    
    case active
    
    case playingGame
    
    
    
    var description: String {
    
    return switch self {
    
    case .active: return "ΞΫςΟϒ"
    
    case .sleep: return "ਭ຾"
    
    case .playingGame: return "ήʔϜத"
    
    }
    
    }
    
    }
    ྫFOVN4UBUVTʹઆ໌Λ෇Ճ͢ΔEFTDSJQUJPOଐੑΛ௥Ճ͢Δɻ
    

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17. 6TJOHJGFMTFBOETXJUDITUBUFNFOUTBTFYQSFTTJPOT
    JGFMTFTXJUDIεςʔτϝϯτΛࣜͱͯ͠ѻ͏͜ͱ͕Ͱ͖Δ
    enum Status: CaseIterable {
    
    case sleep
    
    case active
    
    case playingGame
    
    
    
    var description: String {
    
    switch self {
    
    case .active: "ΞΫςΟϒ"
    
    case .sleep: "ਭ຾"
    
    case .playingGame:"ήʔϜத"
    
    }
    
    }
    
    }
    ྫFOVN4UBUVTʹઆ໌Λ෇Ճ͢ΔEFTDSJQUJPOଐੑΛ௥Ճ͢Δɻ
    4XJUDIจ͕จࣈྻΛฦࣜ͢ͱͯ͠ػೳ
    ͢Δؔ਺಺ʹ͔͕ͭࣜ͠ͳ͍ͷͰ
    SFUVSO΋লུͰ͖Δɻ
    

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18. ৽ػೳᶄ
    ܕύϥϝʔλʔͷύοέʔδରԠ
    

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19. UZQFQBSBNFUFSQBDLT
    ܕύϥϝʔλʔͷύοέʔδରԠ
    wͦ΋ͦ΋4XJGUͷHFOFSJD͸ΞΠσΞͱ࣮ࡍͷܕΛ෼཭͢Δख๏
    wෳ਺ͷܕΛҾ਺ͱͯ͠ΞΠσΞड͚औΔʹ͸Ҿ਺෼ͷఆ͕ٛඞཁͩͬͨ
    wෳ਺ͷܕΛ࣋ͭҾ਺ΛύοέʔδԽ͢Δ৽͍͠ఆ͕ٛొ৔
    wFBDIͱSFQFBUΛ࢖༻ͯ͠ܕύϥϝʔλఆٛΛ࣮ࡍͷ஋औΓग़͠Λ࣮ݱ
    FBDI3FTVMU
    

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20. ܕύϥϝʔλʔͷύοέʔδରԠᶃ
    func query(
    
    
    _ item: Request
    
    
    ) -> Payload
    
    
    func query(
    
    
    _ item1: Request,
    
    
    _ item2: Request
    
    
    ) -> (Payload1, Payload2)
    
    
    func query(
    
    
    _ item1: Request,
    
    
    _ item2: Request,
    
    
    _ item3: Request
    
    
    ) -> (Payload1, Payload2, Payload3)
    
    
    func query(
    
    
    _ item1: Request,
    
    
    _ item2: Request,
    
    
    _ item3: Request,
    
    
    _ item4: Request
    
    
    ) -> (Payload1, Payload2, Payload3, Payload4)
    
    
    

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21. func query(
    
    
    _ item: Request
    
    
    ) -> Payload
    
    
    func query(
    
    
    _ item1: Request,
    
    
    _ item2: Request
    
    
    ) -> (Payload1, Payload2)
    
    
    func query(
    
    
    _ item1: Request,
    
    
    _ item2: Request,
    
    
    _ item3: Request
    
    
    ) -> (Payload1, Payload2, Payload3)
    
    
    func query(
    
    
    _ item1: Request,
    
    
    _ item2: Request,
    
    
    _ item3: Request,
    
    
    _ item4: Request
    
    
    ) -> (Payload1, Payload2, Payload3, Payload4)
    
    
    func query(_ item: repeat RequestPayload>) -> (repeat each Payload)
    ύϥϝʔλ਺Λ૿΍ͨ͠ಉؔ͡਺ఆ͕ٛඞཁͩͬͨ
    ΋ͷ͕ͭͷύϥϝʔλʔͱͯ͠ѻ͏͜ͱ͕Մೳʹ
    ܕύϥϝʔλʔͷύοέʔδରԠᶄ
    

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22. w UZQFQBSBNFUFSQBDLT͸ύϥϝʔλʔͷܕΛอͬͨ··ͳͷͰؔ਺ͷ໭Γ஋
    ΁ɺܕͦͷ΋ͷɺܕʹؔ࿈͢ΔܕΛฦ͢͜ͱ͕Ͱ͖Δɻ
    ܕύϥϝʔλʔͷύοέʔδରԠᶅ
    w౉ͨ͠ύϥϝʔλʔΛ౉ͨ͠ύϥϝʔλʔ਺෼ͷλϓϧΛ
    ฦ͢͜ͱ͕Մೳɻ
    w໭Γ஋ʹύϥϝʔλͰ౉͞ΕͨܕΛ࢖Θͳ͍ͷͰ͋Ε͹ಛ
    ʹܕύϥϝʔλʔΛ࢖͏ඞཁ͕ͳ͍ɻ
    

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23. ܕύϥϝʔλʔͷύοέʔδରԠᶆ
    protocol Animal {
    
    
    associatedtype Food: AnimalFeed
    
    
    associatedtype Commodity: AnimalCommodity
    
    
    
    
    func eat(_ food: Food)
    
    
    func produce() -> Commodity
    
    
    }
    
    
    struct Chicken: Animal {
    
    
    typealias Food = Grain
    
    
    typealias Commodity = ChickenMeat
    
    
    func eat(_ food: Grain) {
    
    
    // do something eat...
    
    
    }
    
    
    
    
    func produce() -> ChickenMeat {
    
    
    return ChickenMeat()
    
    
    }
    
    
    }
    ܕͱ͍ͬͯ΋HFOFSJDTɺQSPUPDPMͱBTTPDJBUFEUZQFΛ
    ૊Έ߹ΘͤΔͱม׵Ͱ͖ΔܕͷόϦΤʔγϣϯ͸૿͑Δ
    

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24. w UZQFQBSBNFUFSQBDLT͸ύϥϝʔλʔͷܕΛอͬͨ··ͳͷͰؔ਺ͷ໭Γ஋
    ͳͲʹύϥϝʔλʔͷܕΛ൓өͨ͠ܕΛ໭Γ஋ʹ൓өͰ͖Δ
    w ܕύϥϝʔλʔͷύοέʔδରԠ͸4XJGU6*ʹ࢖ΘΕͦ͏ͳงғؾΛ͍ͩͯ͠
    Δ͕ͦΜͳ͜ͱ͸ͳ͔ͬͨ
    ܕύϥϝʔλʔͷύοέʔδରԠᶇ
    

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25. ৽ػೳᶅ
    0XOFSTIJQ
    

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26. 0XOFSTIJQ
    ߏ଄ମͰ΋Ϋϥεͷ୅ΘΓΛ͍ͨ͠ɻ
    DMBTTͷར఺͸ΦϒδΣΫτͷղ์λΠϛϯάͰEFJOJU
    ͕ݺͼग़͞Ε
    ΔɻEFJOJU
    ͷಛੑΛར༻ͯ͠ΦϒδΣΫτϋϯυϧ IBOEMF
    Λղ์͢
    Δ࢓૊ΈΛ࡞͍ͬͯΔɻ
    TUSVDUͰ΋޻෉ ࡉ޻
    ͢Ε͹DMBTTΛ࢖Θͳͯ͘΋
    ࣮ݱͰ͖Δ͔΋ʜ
    

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27. 0XOFSTIJQ
    ߏ଄ମͰ΋Ϋϥεͷ୅ΘΓΛ͍ͨ͠ɻ
    struct FileDescriptor: ~Copyable {
    
    
    private var fd: CInt
    
    
    
    
    init(descriptor: CInt) { self.fd = descriptor }
    
    
    func write(buffer: [UInt8]) throws {
    
    
    let written = buffer.withUnsafeBufferPointer {
    
    
    Darwin.write(fd, $0.baseAddress, $0.count)
    
    
    }
    
    
    // ...
    
    
    }
    
    
    
    
    consuming func close() {
    
    
    Darwin.close(fd)
    
    
    }
    
    
    
    
    deinit {
    
    
    Darwin.close(fd)
    
    
    }
    
    
    }
    
    
    

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28. 0XOFSTIJQ
    ߏ଄ମͰ΋Ϋϥεͷ୅ΘΓΛ͍ͨ͠ɻ
    struct FileDescriptor: ~Copyable {
    
    
    private var fd: CInt
    
    
    
    
    init(descriptor: CInt) { self.fd = descriptor }
    
    
    func write(buffer: [UInt8]) throws {
    
    
    let written = buffer.withUnsafeBufferPointer {
    
    
    Darwin.write(fd, $0.baseAddress, $0.count)
    
    
    }
    
    
    // ...
    
    
    }
    
    
    
    
    consuming func close() {
    
    
    Darwin.close(fd)
    
    
    }
    
    
    
    
    deinit {
    
    
    Darwin.close(fd)
    
    
    }
    
    
    }
    
    
    ίϐʔͰ͖ΔΛ൱ఆ͢Δϓϩτίϧ໊͕ڧҾ
    DPOTVNJOHΛ͚ͭΔͱଞͷؔ਺ΑΓ΋࠷ޙʹݺͼग़
    ͞ΕΔ͔ΛίϯύΠϧϕʔεͰνΣοΫ
    

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29. ৽ػೳ
    4XJGUNBDSPT
    

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30. 4XJGUNBDSPTᶃ
    4XJGU"UUSJCVUFTͰ"QQMF͕΍͖ͬͯͨ͜ͱΛ9DPEFͷϓϥάΠϯԽ
    w 1BDLBHFͰఏڙ͞ΕΔϓϥάΠϯ MPDBM͔ΒऔΓࠐΈɺDPMMFDUJPO͔Βऔಘ
    
    w Ͱ࢝·Δ'SFFTUBOEJOHNBDSPT
    w !Ͱ࢝·ΔBUUBDIFENBDSPT
    w !Ͱ࢝·ΔͷͰ4XJGU"UUSJCVUFTΛ4XJGUNBDSPTͱݟ෼͚͕͔ͭͳ͍
    w NBDSPΛॻ͘ͱ4XJGUݴޠͷղੳ໦Λ౉͞ΕΔͷͰɺผͷιʔείʔυ จࣈ
    ྻ
    ΁ͱม׵͢Δ࢓༷
    

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31. 4XJGUNBDSPTᶄ
    4XJGUNBDSPT޲͚ͷ4XJGU"UUSJCVUFT
    w એݴଐੑ %FDMBSBUJPO"UUSJCVUFT
    ͷҰ෦
    w BUUBDIFE
    w 1FFSNBDSPTɺ.FNCFSNBDSPɺ.FNCFSBUUSJCVUFɺ"DDFTTPS
    NBDSPTɺ$POGPSNBODFNBDSPTɺ
    w GSFFTUBOEJOH
    !Ͱ࢝·Δ4XJGU.BDSPΛ࡞Ζ͏ͱ͢Δͱ!Ͱ࢝·
    Δ4XJGU"UUSJCVUFTΛ࢖͏͜ͱʹͳΔ
    

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32. 4XJGUNBDSPTᶅ
    4XJGUNBDSPTͷ༻్
    w ϑϨʔϜϫʔΫಠࣗͷػೳΛ૊ΈࠐΉࡍͷఆܕจ ϘΠϥϓϨʔτίʔυ
    هड़Λ
    4XJGUNBDSPTͰஔ͖׵͑Δ͜ͱ͕Մೳ
    w "QQMFۘ੡ͷϑϨʔϜϫʔΫ΋࠾༻
    w 4XJGU%BUB
    w 0CTFSWBUJPOGSBNFXPSL
    w ιϑτ΢ΣΞΞʔΩςΫνϟ΁ద߹ͤ͞ΔͨΊͷϚΫϩ
    w ରԠͦ͠͏ͳΞʔΩςΫνϟ 7*1&3ɺ3FEVYͱ͔
    
    

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33. 4XJGUNBDSPTᶆ
    4XJGUNBDSPTΛࢼ͢
    w 9DPEF/FX1BDLBHF͔Β4XJGUNBDSPTΛબ୒Մೳ
    w σϑΥϧτͰTUSJOHJGZͷαϯϓϧؚ͕·ΕΔ
    w 9DPEFCFUBͰ͸MPDBM͔ΒऔΓࠐΈͰ͖ͳ͔ͬͨ
    

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34. ͔͜͜Β͸4XJGUNBDSPTʹ
    ࢥ͏ͱ͜Ζʜ
    

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35. 4XJGU४ඪ४ػೳΛ૊ΈࠐΉͨΊʹ4XJGU"UUSJCVUFTʹ৽ఆٛΛ௥Ճ͢Δ
    ͷ΋ݶ౓͕͋Δɻ
    ˡϑϨʔϜϫʔΫʹґଘ͢Δఆ͕ٛཉ͍͔͠ΒϚΫϩػೳΛఏڙ͠Α͏ɻ
    Έ͍ͨͳϊϦͳͷͰ͸
    4XJGUNBDSPTొ৔ͷഎܠΛߟ͑Δ
    IUUQTTQFBLFSEFDLDPNOPUPSPJEBQQMFHBZBSJUBJGBOHUJTXJGUBUUSJCVUFT
    ࢀߟ "QQMF͕
    ΍Γ͍ͨ์୊4XJGU"UUSJCVUFT4QFBLFS%FDL
    

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36. 4XJGUNBDSPT͸ڧྗ͚ͩͲɺϑϨʔϜϫʔΫΛఏڙ
    ͢Δͱ͔ɺϚΫϩ༻1BDLBHFΛҡ࣋Ͱ͖Δ ମྗ͕͋
    Δ
    ૊৫ ίϛϡχςΟɺاۀ
    ʹݶఆ͞ΕΔͷͰ͸
    ϞόΠϧϓϥοτϑΥʔϜʹ͍ͭͯ͸͔ͭͯ΄Ͳͷ
    ։ൃऀ͕૿͑ΔΘ͚Ͱ͸ͳ͍ͷʹʜ
    4XJGUNBDSPT΁ͷٙ໰
    

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37. 4XJGUNBDSPͷαϯϓϧ
    

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38. 0CTFSWBUJPOͷαϯϓϧίʔυ
    4XJGUNBDSPΛ࢖༻
    IUUQTHJUIVCDPNOPUPSPJE(BNF1MBZFS4UBUVT
    

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39. 0CTFSWBUJPOͷαϯϓϧ
    wIUUQTHJUIVCDPNOPUPSPJE
    (BNF1MBZFS4UBUVT
    wήʔϜϓϨΠϠʔͷঢ়ଶΛදࣔ
    มߋͰ͖Δ
    w1FSTPOΛ͜Ε·Ͱͷ࣮૷ɺ
    0CTFSWBUJPOΛ࢖ͬͨ΋ͷΛࢼ͢
    ͜ͱ͕Ͱ͖Δ
    w9DPEFͷΤσΟλͰϚΫϩల։͕
    Մೳ
    (BNF1MBZFS4UBUVT
    

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41. 0CTFSWBUJPOGSBNFXPSLͷϚΫϩͦͷ
    0CTFSWBUJPOGSBNFXPSLͷϚΫϩͦͷ
    0CTFSWBUJPOGSBNFXPSLͷଐੑ؂ࢹΦϒδΣΫτ
    

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42. ͜Ε·Ͱͷ4XJGU6*ͷ൥ࡶ͞͸ͳΜͩͬͨͷ͔
    0CTFSWBCMF0CKFDUɺ!0CTFSWFE0CKFDUɺ
    !4UBUF0CKFDUɺ!&OWJSPONFOU0CKFDU
    
    0CTFSWBUJPOGSBNFXPSL
    

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43. ·ͱΊ
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