ͬ͘͟ΓΘ͔ΔSwift TokyoTech LT #2 @S_Shimotori 

୭ʁ • @S_Shimotori (@S_Shimotori_pub) • ৘ऑΤֶܥM2 • DroidKaigiӡӦελοϑ • Swift΍PythonΛॻ͍͓ͯۚΛ໯͏͓࢓ࣄ 

DroidKaigi2018 ։࠵ܾఆʂ 2018೥2݄8-9೔@ϕϧαʔϧ৽॓άϥϯυ https://droidkaigi.github.io/2018/ 

AndroidͱiOSͷ؀ڥͷҧ͍ • Android • ॳճ͚ͩొ࿥ྉΛ෷͑͹OK • ೔ຊAndroidͷձ͕͋Δɺֶੜ෦΋͋Δ • ࠓKotlin͕೤͍ʂ • iOS • ຖ೥͓෍ࢪ͕ඞཁ • ͦΜͳձ͚͋ͬͨͬ • ·ͨSwift4ʹॻ͖׵͑Δ࡞ۀ͕͸͡·Δ͓… 

ϞόΠϧͷ࿩͸Ҏ্ʂ 

ຊ୊ 

͓඼ॻ͖ • Swiftͷจ๏ͷ֓ཁ • Swift͕࢖͑Δ৔ॴ • CϥΠϒϥϦͷݺͼग़͠ • Swiftʹ͍ͭͯ΋ͬͱ஌Γ͍ͨͱ͖͸ 

͓඼ॻ͖ • Swiftͷจ๏ͷ֓ཁ • Swift͕࢖͑Δ৔ॴ • CϥΠϒϥϦͷݺͼग़͠ • Swiftʹ͍ͭͯ΋ͬͱ஌Γ͍ͨͱ͖͸ 

Swiftͷจ๏ͷ֓ཁ 

ཁ໿͢Δͱ͜Μͳ͔Μ͡ʂ • ϓϩτίϧࢦ޲ / ΦϒδΣΫτࢦ޲ /
 ؔ਺ܕ / ໋ྩܕ / ϒϩοΫߏ଄ • ڧ͍੩తܕ෇͚ / ܕਪ࿦ • Objective-C౳͔ΒͷӨڹ͋Γ • Swift4Ӷҙ੡࡞த • ܕ҆શnull҆શɻૉ੖Β͍͠ɻ • LLVMͱ͔ͳΜͱ͔ https://en.wikipedia.org/wiki/Swift_(programming_language) 

ϓϩτίϧࢦ޲ʁ 

Swiftyʹॻ্͘Ͱ೺Ѳ͓͖͍ͯͨ͜͠ͱ • Swiftʹ͸classͷଞʹstructɺenumɺprotocolΛ࣋ͭ • protocol͸”ಛఆͷॲཧͷͨΊͷϝιουͷઃܭਤ” • JavaͰ͍͏ͱ͜Ζͷinterface • ͭ·Γ࢖Θͳͯ͘΋ಈ͔ͳ͍͜ͱ͸ͳ͍ • Swift3ඪ४ϥΠϒϥϦͷ201γϯϘϧͷ͏ͪɺ
 struct͸140ݸɺenum͸12ݸɺprotocol͸48ݸɺ
 class͸ͳΜͱ1ݸʂ 

Java ComparableͱSwift Comparable • Java Comparable • Swift Comparable μΠϚ http://qiita.com/S_Shimotori/items/83e22d83f5c0096a6d5b http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/share/classes/java/lang/Comparable.java https://github.com/apple/swift/blob/c15c671372620b543e19a662218a247f601628e4/stdlib/public/core/Comparable.swift ※ ࣮ࡍ͸Equatableͷ “=” ͱComparableͷ ”<“ Λ࣮૷͢Ε͹଍ΓΔ 

OptionalͱCommandLine • Optional͸enum Optional • .some(Wrapped)ͱ.noneΛྻڍ • Nullableͷਖ਼ମ • enum CommandLine͸ྻڍͯ͠ͳ͍ • ྻڍܕࣗ਎͕ΠχγϟϥΠζ͞Εͳ͍ಛੑΛར༻ https://github.com/apple/swift/blob/master/stdlib/public/core/CommandLine.swift https://github.com/apple/swift/blob/master/stdlib/public/core/Optional.swift Optionalͷ౶ҥߏจ 

ͪͳΈʹ: ԋࢉࢠΛఆٛ͢Δ • Swift͸ࣗ෼ͰԋࢉࢠΛఆٛ͢Δ͜ͱ͕Մೳ • ओʹؔ਺ܕ͍ͨ͠ਓ͕࡞Δ “>=“ • ࢖͑Δه߸͸ແ೉ͦ͏ͳ΍ͭ • / = - + ! * % < > & | ^ ~ ?ͱ͔ଞ͍Ζ͍Ζ • ͑ʁ$͕ͩΊͳͷʹὺ͕࢖͑Δͷʁʁ 

ܕਪ࿦΋͋ΔΜͩͶ͐ ͍͍ͪͪܕΛॻ͔ͳ͍͍ͯ͘Ͷʂ 

SwiftͰܕਪ࿦ͱ͍ͬͨΒ…… • ʮίϯύΠϧ࣌ؒͷେ൒͕ܕਪ࿦͡ΌΜwʯ • ʮਪ࿦ʹ͔͔͔࣌ؒͬͨΒίϯύΠϧఘΊ·ͨ͠Τϥʔʯ • ղܾࡦ: • ৽͍͠όʔδϣϯͷSwift(ͱXcode9)Λ࢖͏ • એݴ࣌ʹͪΌΜͱܕΛॻ͘ • ؔ਺ܕͳΜͯͳ͔ͬͨɻ͍͍Ͷʁ 

ΤϥʔදݱͲ͏ͳͬͯΜͷʁ 

Swiftʹ͓͚ΔΤϥʔදݱ • جຊతʹ͸NonNullɺthrow΋ͳ͠ • ੒ޭ/ࣦഊͷ2஋͸໭Γ஋NullableͰදݱ • Optional.some(Wrapped)ͰแΜͰฦ͢ • Լॲཧ͠ͳ͍ͱแΜͩத਎͸࢖͑ͳ͍ʂ • ΑΓৄࡉͳΤϥʔදݱΛ͢ΔͳΒErrorΛ౤͛Δ • Τϥʔ͕ى͖ͳ͍͜ͱ͕໌Β͔ͳΒ͹”!”Ͱ௵͢ 

͓඼ॻ͖ • Swiftͷจ๏ͷ֓ཁ • Swift͕࢖͑Δ৔ॴ • CϥΠϒϥϦͷݺͼग़͠ • Swiftʹ͍ͭͯ΋ͬͱ஌Γ͍ͨͱ͖͸ 

Swift͕࢖͑Δ৔ॴ 

͋ʔ͸͍͸͍iOSͶ ڵຯͳ͍ΜͰ✋ 

DarwinҎ֎Ͱ΋࢖͑Δ͔Βʂ ͕͢͞ʹ2.2͸ݹ͍͕ 

LinuxͰSwift • swift.orgͷUbuntu༻όΠφϦ͔dockerΛ࢖͏ͷָ͕ • Կ͔࡞Δ࣌͸Swift Package ManagerΛ࢖͏ͱྑ͍ • ґଘؔ܎ղܾͨ͠Γςετͨ͠Γ͢Δ • ίϚϯυϥΠϯπʔϧ͕࡞ΕΔ • WebϑϨʔϜϫʔΫͰWebΞϓϦ͕࡞ΕΔ • Perfectͱ͔Vaporͱ͔ͦͷ΁Μ 

ͱ͜ΖͰ 

Swift͕Ͱ͖Δ͜ͱɺ୯඼Ͱ͸Ͱ͖ͳ͍͜ͱ • Swift಺ଂͷඪ४ϥΠϒϥϦ͕Ͱ͖Δ͜ͱ • هड़ʹඞཁͳػೳͷجຊ૚ • Stringͱ͔printͱ͔ͦ͏͍͏ͷ • “import Foundation”ͰͰ͖Δ͜ͱ • ΞϓϦͷجຊతͳػೳʹؔΘΔૢ࡞ • ϑΝΠϧͱ͔ηογϣϯͱ͔ͦ͏͍͏ͷ • Darwin༻FoundationͱLinux༻Foundation͸ผ෺ (௚༁) 

swift-corelibs-foundationਐḿঢ়گ(7݄17೔ݱࡏ) https://github.com/apple/swift-corelibs-foundation/blob/master/Docs/Status.md “Unimplemented” 

͓඼ॻ͖ • Swiftͷจ๏ͷ֓ཁ • Swift͕࢖͑Δ৔ॴ • CϥΠϒϥϦͷݺͼग़͠ • Swiftʹ͍ͭͯ΋ͬͱ஌Γ͍ͨͱ͖͸ 

CϥΠϒϥϦͷݺͼग़͠ (SPMͰͷ) iOS/macOS͸΋ͬͱ͔ΜͨΜɻ 

SPMͰCϥΠϒϥϦΛ࢖͏ • ޙൃݴޠΒ͘͠ͲΜͲΜઌഐͷҨ࢈Λ࢖͍ͬͯ͘ • Foundation͕ΞϨͳͷͰ࢖͍ݹ͞ΕͨϥΠϒϥϦͷ ํ͕҆৺ • SPMͰϥοϓ͠ɺ1ͭͷύοέʔδͱͯ͠ѻ͏ • ґଘϦετʹ͸Swiftͷ΋ͷ΋Cͷ΋ͷ΋ҰॹʹฒͿ • ໊લΛCHogeͱ͢Δ׳ྫ͕͋Δ • cURLͳΒCCurlͱ͔ 

໰୊͕ൃੜ͢Δ΍Γํ ΅͘ͷߟ͍͖͑ͨ͞ΐ͏ͷ41.ύοέʔδ ύοέʔδ" ύοέʔδ# ύοέʔδ$ *#.4XJGU
$$VSM 44IJNPUPSJ
$$VSM D63- ·Ί͖ͪ͠: IBM͸͕Μ͹ͬͯSwiftͯ͠Δɻ͍͍ͻͱɻ ໊લিಥ (ґଘݩˠґଘઌ) 

͓඼ॻ͖ • Swiftͷจ๏ͷ֓ཁ • Swift͕࢖͑Δ৔ॴ • CϥΠϒϥϦͷݺͼग़͠ • Swiftʹ͍ͭͯ΋ͬͱ஌Γ͍ͨͱ͖͸ 

Swiftʹ͍ͭͯ ΋ͬͱ஌Γ͍ͨͱ͖͸ 

ͱΓ͋͑ͣॻ͖ͳ͕Β΍ͬͯΈ͍ͨʂ • ԦಓXcodeͰߦ͖͍ͨਓ • Xcode8ʹ͸ϦϑΝΫλϦϯάػೳ͕ͳ͍(স) • playgroundsͰؾܰʹॻ͚Δɺͨͷ͍͠ • JetBrainsڭͷਓ • iOSͱҰॹʹ΍ΔͳΒAppCodeɺpure SwiftͳΒCLion • Vimmer • ͪΌΜͱߋ৽͕௥͍͍ͭͯΔͷ͸ͳ͍Μ͡Ό… • Emacser • ͪΌΜͱߋ৽͞ΕͯΔɺͣΔ͍ 

͋ͱ͸͜ͷลಡΜͰ͓͘ͱ͍͍Αɻ • https://developer.apple.com/library/content/documentation/Swift/ Conceptual/Swift_Programming_Language/ • https://developer.apple.com/documentation/swift • https://swift.org/ 

·ͱΊ 

Swiftͷ͕͍͜͜͢͝ʂ • ڧ͍੩తܕ෇͚ͰprotocolͰenumͰ͍͢͝ʂ • αʔό΋ίϚϯυϥΠϯπʔϧ΋࡞ΕΔʂ • ͦΕPythonͰΑ͘ͳ͍ʁ • ಈతܕ෇͚͸அͯ͡Noɺઈରʹڐ͞ͳ͍ • ͦΕGo • ͦͷՄೳੑ͸͋Δ • ͦΕKotlin • ૉͰAWSLambda͍͚ΔΜͩ΋ΜͳʔͣΔ͍Αͳʔ