Introducing Function Builder

potatotips #267
2019/12/17

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
   
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
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