Optional(2018)年...その後

Transcript

1. 0QUJPOBM
   ೥
   ͦͷޙ
   )JEFBLJ5BNBJ
   1PUBUPUJQT+VMZ
   

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2. ࣗݾ঺հ
   )JEFBLJ5BNBJ
   ɾ.POFZ'PSXBSE *OD
   ɾJ04ΞϓϦΤϯδχΞ
   ɾ͘͘͢͢ʂࢠҭͯΤϯδχΞ.FFUVQ
   UBNBEPO
   !UBNBEPO
   

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3. IUUQTNPOFZGPSXBSEDPNFOHJOFFST@CMPHPQUJPOBM
   0QUJPOBM
   ೥͚͋·͓ͯ͠ΊͰͱ͏͍͟͝·͢
   

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4. ͜ΕΛػʹXBSOJOHΛ๾໓͢΂͘
   ౰ࣾJ04ΤϯδχΞ͕
   ෦ॺΛӽ͑ͯऔΓ૊Έ·ͨ͠
   ௨ৗͷػೳ։ൃͱฒߦͯ͠໿ϲ݄
   

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5. Before
   

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6. ΍ͬͨ͜ͱͦͷ̍
   4XJGU-JOU
   "VUPDPSSFDU
   

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7. Πϯσϯτͷௐ੔͚͔ͩͱࢥͬͯͨΒɺ
   ؆୯ͳwarning͸मਖ਼ͯ͘͠Εͨ
   func validate(_ input :(hoge: Fuga)) throws -> Void {
   func validate(_ input :(hoge: Fuga)) throws {
   

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9. ΍ͬͨ͜ͱͦͷ̎
   γϡοͱ௚ͤͦ͏ͳXBSOJOHΛফ͢
   

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10. - public final class Hoge: Fuga {
    + public class Hoge: Fuga {
    - network.request(request) { _ in }
    + _ = network.request(request) { _ in }
    ྫʣ͜͏͍͏΍ͭ
    

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12. ͋ͱ͸ͪͪ͘͘஍ಓʹ
    XBSOJOHΛͭͿ͍ͯͬͨ͠
    

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13. ਏ͔ͬͨ΍ͭ
    

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14. Ұ෦ͷϥΠϒϥϦ͕$PDPB1PET
    ܦ༝͡Όͳ͍ํ๏Ͱಋೖͯ͋͠Δ
    ʢେ൒͸$PDPB1PETܦ༝ʣ
    wͲͷόʔδϣϯΛ࢖ͬͯΔ͔෼͔Βͳ͍ͷͰ࠷৽ʹΞο
    ϓσʔτͨ࣌͠ͷӨڹൣғ͕ݟ͑ͣɺΞοϓσʔτ͠
    ͯྑ͍ͷ͔ෆ໌
    w͔͠΋Ұ෦ಠ࣮ࣗ૷Λ௥Ճͯ͠࢖ͬͯΔ΍ͭ΋͋Δ
    

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15. ಠ࣮ࣗ૷Λ௥Ճͯ͠ͳ͍
    ϥΠϒϥϦ
    wϥΠϒϥϦͷόʔδϣϯΛίϛοτϩά͔Βਪଌ
    ͠ӨڹൣғΛௐࠪ
    w$PDPB1PETʹҠߦ
    

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16. ಠ࣮ࣗ૷Λ௥Ճͯ͠Δ
    ϥΠϒϥϦ
    w൚༻తͳػೳ௥ՃͩͬͨͷͰɺϥΠϒϥϦΛGPSL͠
    ͯຊՈʹQVMMSFRVFTUΛग़ͨ͠
    wऔΓࠐ·Εͳ͔ͬͨϥΠϒϥϦ͸GPSLFESFQPTJUPSZ
    ͷϥΠϒϥϦΛ$PDPB1PETͰΠϯετʔϧ
    

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17. After
    

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18. Before
    

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19. After
    Ϗϧυʹ͔͔Δ͕࣌ؒϝνϟ୹ॖ͞Εͨ
    XBSOJOH࡟আ͚ͩͰͳ͘ɺ4XJGUରԠ΍
    ίϯύΠϧΦϓγϣϯͷมߋ΋ޮՌ͕͋ͬͨͱࢥΘΕΔ
    

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20. ࠷ޙͷXBSOJOH
    ՝ۚͷϨγʔτ͕J04ܗࣜ
    ˠݱࡏରԠத
    

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21. XBSOJOHΛ૿΍͞ͳ͍
    औΓ૊Έ
    

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22. Ұྫ
    ɾϏϧυ࣌ʹ4XJGU-JOU"VUPDPSSFDU࣮ߦ
    ɾϏϧυʹNTҎ্͔͔͍ͬͯΔॲཧͰXBSOJOH
    ɾ4JEFSʢNJTTQFMMʣಋೖ
    ɾ%BOHFSಋೖ
    

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23. ·ͱΊ
    w ݹ͔͘Βӡ༻͞Ε͍ͯΔϓϩμΫτͰ΋ؤுͬͯऔΓ૊Ί͹ɺXBSOJOHΛ
    ΄΅̌ʹग़དྷΔ
    w Ϗϧυ୹ॖͷऔΓ૊Έ΋ग़དྷͯϏϧυ͕࣌ؒ෼෼·Ͱ୹ॖग़དྷͨ
    w ෦ॺΛ·͍ͨͰXBSOJOH๾໓ʹऔΓ૊ΜͩͷͰɺࣾ಺ͷJ04ΤϯδχΞ಺Ͱ
    XBSOJOH΍ϦϑΝΫλϦϯάʹର͢Δҙ͕ࣝߴ·ͬͨ
    w XBSOJOHΛݮΒͯ͠ຬ଍͢ΔͷͰ͸ͳ͘ɺ૿΍͞ͳ͍࢓૊Έͷߏங͕େࣄ
    

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24. ͝ਗ਼ௌ͋Γ͕ͱ͏͟͝
    ͍·ͨ͠
    

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