Introducing Function Builder

Transcript

1. Introducing Function Builder potatotips #267 2019/12/17

2. Akihisa Sengoku @akihisasen גࣜձࣾαΠόʔΤʔδΣϯτ AmebaʢΞϝʔόʣ iOSΤϯδχΞ

3. Function Builderͱ͸ʁ

4. 4XJGU6*Ͱ࢖ΘΕ͍ͯΔΫϩʔδϟʔతͳ΋ͷʁ

5. %4-Λॻ͘͜ͱ͕Ͱ͖ΔΑ͏ʹͳͬͨʁ

6. 4XJGUͰ௥Ճ͞Εͨ৽ػೳ 1SPQPTBM 'PSVN

7. Builderͷϧʔϧʹैͬͯؔ਺Λ ҉໧తʹม׵͢Δ͜ͱ͕Ͱ͖Δ #VJMEFSΛ
   దԠͨؔ͠਺ #VJMEFSϧʔϧʹ
   Ԡͯؔ͡਺Λม׵ #VJMEFSΛఆٛ
   #VJMEFSΛ
   దԠ
   

8. None
9. None

10. Function BuilderʹΑΓ ಠࣗͷDSLΛΑΓ࡞੒͠΍͘͢ͳͬͨ - Structure Data (json, XML) - UI

    View Hierarchies - HTML DOM Hierarchies

11. ࡞Γํ!

12. #VJMEFSͷ࡞੒ํ๏ʹ͍ͭͯ

13. Builderͷ࡞੒ํ๏ 1. struct or classͷલʹ`@_functionBuilder`Λ͚ͭͯ ఆٛ͢Δɻ 2. static func Ͱ

    `buildBlock(_ components: Component...) -> Component` Λఆٛ͢Δɻ

14. ͦͷଞͷbuildͷ࣮૷ • buildExpression(_ expression: Expression) -> Component • buildFunction(_ components:

    Component...) - > Return • buildDo(_ components: Component...) -> Component • buildOptional(_ component: Component?) -> Component

15. 'VODUJPO
    #VJMEFSͷ࢖༻ํ๏

16. Function Builderͷ࢖༻ํ๏ 1. Function BuilderΛ࢖༻͍ͨؔ͠਺ͷલʹ @FunctionBuilder໊Λ͚ͭΔ 2. BuilderͷbuildBlockʹରԠ͢ΔҾ਺Λɺ վߦ۠੾ΓͰهड़

17. ؔ਺ͷҾ਺ͷΫϩʔδϟͰFunction Builder Λ࢖༻͢Δ͜ͱ͕Ͱ͖Δ

18. None

19. ϓϩμΫτಋೖ

20. SwiftUI HTML NSAttributedString Network UIKit ϓϩμΫτಋೖ: DSL

21. Amebaͷಋೖྫ NSAttributedStringͷIFΛ៉ྷʹ
    
    
    5JQT

22. What's New in Swift - WWDC2019 https://developer.apple.com/videos/play/ wwdc2019/402/ Function Builder

    - swift-evolution https://github.com/apple/swift-evolution/blob/ 9992cf3c11c2d5e0ea20bee98657d93902d5b17 4/proposals/XXXX-function-builders.md