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έϮ⑲ͺຓ
θ⑲ώΤόλΩϸͫΝ
_᧬ͺԫᇷዛູ_
2016/8/20
ezura
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FSSPS͜ṽͫ͟͝Ħ
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XBSOJOH͜ṽͫ͟͝Ħ
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Δͩ͘ͼΛj
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Δ͵ͺ᪇͡
ཱͺᲇձ͖ͱ͝͵ͱj
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ဒᘥ ࣮ḝ
ᙉණ
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͟ΝĈ
ᦉᷯΔ͔Ν
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࣮ḝ᧸ͽុΜΤ᧬ͺԫᓸ
ᓸͣΑΐͩΙ͘
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έϮ⑲ͺຓ
θ⑲ώΤόλΩϸͫΝ
_᧬ͺԫᇷዛູ_
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↟1IBOUPN5ZQF
↟%FDMBSBUJPO"UUSJCVUFT
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$BTF
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class HogeOperation {
/// Ұ͚ͩݺͿ͜ͱ
func prepare()
/// prepare ޙ͔Β͑Δ
func execute()
/// ͍ͭݺΜͰྑ͍
func mob()
}
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/// Ұ͚ͩݺͿ͜ͱ
/// prepare ޙ͔Β͑Δ
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private var isPrepared = false
/// Ұ͚ͩݺͿ͜ͱ
func prepare() {
guard !isPrepared else {
fatalError("prepare() Λෳݺͳ͍͜ͱ")
}
isPrepared = true
}
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όλΩϸͩΚ͘Ĉ
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1IBOUPN5ZQF
ܕใΛར༻ͯ͠ॲཧͷޡΓΛࢦఠՄೳʹ
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ᴰᨷঢ়ỪΑ
ᑿᠭ൱ၙͼϦςψώΤᨷᤅ
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protocol OperationState {}
class Init: OperationState {}
class Prepared: OperationState {}
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class HogeOperation {}
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extension HogeOperation where State: Init {
/// Ұ͚ͩݺͿ͜ͱ
func prepared() -> HogeOperation {
let readyOp = HogeOperation()
// TODO: ඞཁͳσʔλΛҾ͖ܧ͗
return readyOp
}
}
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θϸϖΩϰέϮ⑲
ỹ
ỹ
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extension HogeOperation where State: Prepared {
/// prepare ΛݺΜͩޙ͔Β༻Մೳ
func execute() {
/* do somethig */
}
}
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θϸϖΩϰέϮ⑲
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ଓ͟8FC
https://gist.github.com/ezura/
f5aebef7bb86edbfd40b0bd1d0435e00
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1IBOUPN5ZQF͖Ο͖Ο
↟ 'VODUJPOBM4OJQQFU1IBOUPN5ZQFT
↟ 4XJGU.POFZXJUI1IBOUPN5ZQFT
↟ 4XJGU1IBOUPN5ZQF ྶṞ
↟ 1IBOUPN5ZQFθϸϖΩϰᙉͽঢ়ᴋφάψδͫΝ
TIJCVZBTXJGU
↑ ঢ়ଶભҠΛ៉ྷʹදݱ͍ͯͯ͠ײಈ
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$BTF
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/// ΘΓʹ fuga Λ͏͜ͱʂ
func hoge() { … }
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όλΩϸͩΚ͘Ĉ
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%FDMBSBUJPO
"UUSJCVUFT
ใΛ༩
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/// ΘΓʹ fuga() Λ͏͜ͱʂ
@available(*, unavailable,
message="͓ޚ໔͞…(ƅωƅ)",
renamed="fuga")
func hoge() { … }
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/// ΘΓʹ fuga() Λ͏͜ͱʂ
@available(*, unavailable,
message="͓ޚ໔͞…(ƅωƅ)",
renamed="fuga")
func hoge() { … }
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/// ΘΓʹ fuga() Λ͏͜ͱʂ
@available(iOS, deprecated=1,
message="͓ޚ໔͞…(ƅωƅ)",
renamed="fuga")
func hoge() { … }
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ᬋණ
↟ !BWBJMBCMF
↟ !EJTDBSEBCMF3FTVMU 4XJGU͝Λ
↟ !XBSO@VOVTFE@SFTVMU 4XJGUഇᬬ
: Swift3 ͔ΒҰ෦༷͕มߋ͞Ε·͢
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ᓸͣ
͖ͣͯͫ͘͝Ħ
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ͦਗ਼ௌ͔Μ͞ͺ͖ͦͨ͘ΐͩͱĈ