メタプログラミング向けのテンプレートエンジン gysb を作った

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1. ϝλϓϩάϥϛϯά޲͚ ͷςϯϓϨʔτΤϯδϯ gysb Λ࡞ͬͨ omochimetaru @

2. Array ͱ ஥ؒͨͪ Array - startIndex, endIndex, subscript, _ArrayBuffer ArraySlice

   - startIndex, endIndex, subscript, _SliceBuffer ContiguousArray - startIndex, endIndex, subscript, _ContiguousArrayBuffer

3. gyb Generate Your Boilerplate

4. gyb Generate Your Boilerplate ࣮ߦ: %{ <python code> }% ࣮ߦ:

   % <python code> (ߦ຤) ࣜల։: ${ <python code> }

5. Arrays.swift.gyb apple/swift @ github

6. %{ arrayTypes = [ ('ContiguousArray', 'a `ContiguousArray` instance'), ('ArraySlice', 'an

   `ArraySlice` instance'), ('Array', 'an array'), ] }% % for (Self, a_Self) in arrayTypes: public struct ${Self}<Element> { %if Self == 'Array': internal typealias _Buffer = _ArrayBuffer<Element> %elif Self == 'ArraySlice': internal typealias _Buffer = _SliceBuffer<Element> %else: internal typealias _Buffer = _${Self.strip('_')}Buffer<Element> %end internal var _buffer: _Buffer } %end

7. public struct ContiguousArray<Element> { internal typealias _Buffer = _ContiguousBuffer<Element> internal

   var _buffer: _Buffer } public struct ArraySlice<Element> { internal typealias _Buffer = _SliceBuffer<Element> internal var _buffer: _Buffer } public struct Array<Element> { internal typealias _Buffer = _ArrayBuffer<Element> internal var _buffer: _Buffer }

8. gyb ͷྑ͘ͳ͍ͱ͜Ζ

9. gyb ͷྑ͘ͳ͍ͱ͜Ζ python Λॻ͘ͱ͜Ζ

10. gysb Generate Your Swifty Boilerplate

11. gysb Generate Your Swifty Boilerplate https://github.com/omochi/gysb ࣮ߦ: %{ <swift code>

    }% ࣮ߦ: % <swift code> (ߦ຤) ࣜల։: ${ <swift code> }

12. Demo ࣮ࡍͷσϞͷͱ͖͸ɺ ҎԼͷιʔεΛ୊ࡐʹɺ --source-dirs, --parse, --compile Ϟʔυͷಈ࡞Λ঺հ͠ ͨɻ https://github.com/omochi/ReactiveEmitter/blob/master/ Sources/ReactiveEmitter/Operator/Combine.swift.gysb

13. gysb ͷ։ൃ gysb ͷಈ࡞ݪཧͦΕࣗମϝλϓϩάϥϛϯά͔ͩΒ Swift ͷϝλϓϩάϥϛϯά͢ΔͨΊʹ Swift ͷϝλϓϩάϥϛϯάΛߦ͏ Swift ϓϩάϥϜΛ࡞ͬͨ

    ! (͋ͱ Kotlin ΍ C++ ΋ੜ੒Ͱ͖ΔΑ)

14. (એ఻) Discord Offline Discord αʔό ios-developers-japan ΛϦΞϧͰ 12/4 ϝϧΧϦ ύωϧσΟεΧογϣϯܗࣜ

    https://connpass.com/event/71774/

15. Sourceryͱͷҧ͍ Sourcery ͸ ܕ৘ใऔಘ + ςϯϓϨʔτ(ෳ਺ݴޠ) gysb ͸ ςϯϓϨʔτ Sourcery

    ͷ swift ςϯϓϨʔτ͸ϥΠϒϥϦඇରԠ gysb ͸ gysb.json Ͱ SwiftPM ʹରԠ