Getting Started with Swift WebAssembly

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4XJGU8"4.Ͱ։ൃͯ͠Έͨ࿩ 2

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4XJGU8"4.Ͱ։ൃͯ͠Έͨ࿩ 4XJGU8"4.Λ։ൃ͢Δ࿩ 3

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8"4. 8FC"TTFNCMZ ϒϥ΢βͰಈ࡞͢Δ௿ڃݴޠ • ϙʔλϒϧ • ηΩϡΞ • ελοΫϚγϯ 4

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4XJGUͰ8FCϑϩϯτΛॻ͖͍ͨʂʂ 5

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4XJGUͷ8"4.ύΠϓϥΠϯ 6

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4XJGUͷ8"4.ύΠϓϥΠϯ 7

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--7.ͱ4XJGUͷؔ܎ SwiftಠࣗͷLLVMଐੑ https://github.com/apple/swift-llvm • swiftself • swifterror 8

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5ISPXTͳؔ਺ݺͼग़͠ typealias NonThrowableFunc = () -> Void typealias ThrowableFunc = () throws -> Void let f: NonThrowableFunc = {} let g: ThrowableFunc = f try g() 9

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/PO5ISPXBCMF'VOD5ISPXBCMF'VOD 10

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ϥϯλΠϜදݱ 4XJGU෩ typealias NonThrowableFunc = () -> Void typealias ThrowableFunc = (inout Error) -> Void let f: NonThrowableFunc = {} let g: ThrowableFunc = f var error: Error try g(&error) Ҿ਺ͷ਺͕૿͑ͯΔ https://speakerdeck.com/omochi/swiftfalseguan-shu-xing-falseshi-xing-shi-biao-xian 11

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TXJGUFSSPSͱ8"4.ϥϯλΠϜ ؔ਺ݺͼग़࣌͠ͷγάωνϟνΣοΫ -> callerͷݺͼग़ͦ͏ͱ͍ͯ͠Δγάωνϟͱcallee ͷγάωνϟ͕Ұக͠ͳ͍ͷͰΫϥογϡ https://webassembly.org/docs/security/ 12

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ରԠࡦ શͯͷؔ਺ʹswifterrorΛ෇͚ͯίʔυੜ੒͢Δɻ https://github.com/apple/swift/pull/24684#issuecomment-491487863 13

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·ͱΊ • LLVMΛ࢖͍ͬͯͯ΋؆୯ʹ͸͍͔ͳ͍ • SwiftͷWASMରԠ͸΋͏গ͠଴ͬͯͶ 14