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Contributing to Swift by @neilkimmett

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Contributing to Swift - a little revision - story of my contribution - ways you can contribute - gnarly details

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struct CGPoint { var x: CGFloat var y: CGFloat } struct CGSize { var width: CGFloat var height: CGFloat } struct CGRect { var origin: CGPoint var size: CGSize }

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struct CGPoint { static var zero: CGPoint } struct CGSize { static var zero: CGSize } struct CGRect { static var zero: CGRect } x: 0 y: 0 width: 0 height: 0 origin: {0, 0} size: {0, 0}

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view.frame.origin = let view = UIView() … .zero

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struct UIEdgeInsets { var top: CGFloat var left: CGFloat var bottom: CGFloat var right: CGFloat }

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view.layoutMargins = let view = UIView() … UIEdgeInsetsZero .zero

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http://bugreport.apple.com/

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http://bugreport.apple.com/

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https://swift.org

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https://github.com/apple/swift

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‼

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https://github.com/apple/swift/pull/1323

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What can I do?

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“To be a truly great community, Swift.org needs to welcome developers from all walks of life, with different backgrounds, and with a wide range of experience. A diverse and friendly community will have more great ideas, more unique perspectives, and produce more great code. We will work diligently to make the Swift community welcoming to everyone.”

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https://lists.swift.org

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https://stylemac.com/hirundo/

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https://apple.github.io/swift-evolution/

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https://swiftweekly.github.io

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https://spec.fm/podcasts/swift-unwrapped

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@jckarter Joe Groff @UINT_MIN Jordan Rose @dgregor79 Doug Gregor @tkremenek Ted Kremenek @ericasadun Erica Sadun @modocache Brian Gesiak

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https://bugs.swift.org

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https://github.com/apple/swift

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Ninja

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brew install cmake ninja

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git clone https://github.com/apple/swift.git mkdir swift-source cd swift-source ./swift/utils/update-checkout --clone

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./swift/utils/build-script -h ./swift/utils/build-script -R -t

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LLVM

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LLVM IR x86 executable clang swift Haskell ARM PowerPC frontend backend

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.swift AST SIL LLVM IR assembly executable parse SILGen IRGen LLVM

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swiftc -dump-ast -emit-silgen -emit-sil -emit-ir -emit-assembly add.swift

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let x = 1 + 1 print(x) add.swift

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swiftc -dump-ast add.swift

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swiftc -dump-ast add.swift

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swiftc -emit-silgen add.swift | xcrun swift-demangle

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swiftc -emit-silgen add.swift | xcrun swift-demangle

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swiftc -emit-silgen add.swift | xcrun swift-demangle

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swiftc -emit-silgen add.swift | xcrun swift-demangle

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swiftc -emit-silgen add.swift | xcrun swift-demangle

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swiftc -emit-sil add.swift | xcrun swift-demangle

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swiftc -emit-ir add.swift | xcrun swift-demangle

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swiftc -emit-assembly add.swift | xcrun swift-demangle

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https://nicoleorchard.com/blog/compilers

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https://github.com/apple/swift-evolution Swift 5

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- ABI stability required - Generics and String features for stdlib - Memory ownership model - Source breaking changes have even higher bar than Swift 4 - Every evolution proposal requires working implementation with test cases Swift 5

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No-one has any idea what they’re doing

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https://www.youtube.com/watch?v=GnT2ZeHVJe4

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https://news.realm.io/news/tryswift-jesse-squires-contributing-open- source-swift/ Jesse Squires - Contributing to Open Source Swift

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https://news.realm.io/news/slug-russ-bishop-contributing-open- source-swift-proposal/ Russ Bishop - Contributing to Swift: From Proposal to Shipped

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Thanks! from @neilkimmett