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About Type Syntax Proposal
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Yosuke Kurami
May 14, 2022
Programming
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About Type Syntax Proposal
Yosuke Kurami
May 14, 2022
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Transcript
5ZQF4DSJQU͕&$."4DSJQUʹ ؚ·ΕΔ͕དྷΔ͔ʂ
5ZQF4ZOUBY1SPQPTBM https://github.com/tc39/proposal-type-annotations
5ZQF4ZOUBY1SPQPTBM w .JDSP4PGU͕5$ʹఏग़ͨ͠Ҋ ݄ݱࡏ4UBHF https://devblogs.microsoft.com/typescript/a-proposal-for-type-syntax-in-javascript/
5ZQF4ZOUBY1SPQPTBM w τϥϯεύΠϧͤͣʹɺ UTϑΝΠϧΛ࣮ߦͰ͖ΔΑ͏ʹͳΔ w ʮϒϥβ͕ܕνΣοΫΛͯ͘͠ΕΔʯΘ͚Ͱͳ͍ w 5ZQF4ZOUBYͱ͋ΔΑ͏ʹɺ4ZOUBY จ๏ ͷ
w 4FNBOUJDT ҙຯ ʹҰ౿Έࠐ·ͳ͍
5ZQF4ZOUBY1SPQPTBM w +BWB4DSJQUΤϯδϯ: numberͷ෦ΛΓམͱ࣮ͯ͠ߦ͢Δ͚ͩ 5ZQF"OOPUBUJPO͕ਖ਼͍͔͠Ͳ͏͔ෆ w $ tsc --target
esnextͱಉ͜͡ͱΛ+BWB4DSJQUΤϯδϯଆ͕ͬͯ͘ ΕΔΠϝʔδ
จ๏͕ඪ४Խ͞ΕΔҙຯ 'PS5ZQF4DSJQU w 5ZQF4DSJQUຊՈʹͱͬͯ w 5ZQF4ZOUBY͕&$."4DSJQUʹؚ·ΕΔͱɺߏจͷՃʹඪ४Խϓϩη εΛ௨աͤ͞Δඞཁ͕ൃੜ͢ΔʢউखʹߏจΛมߋͰ͖ͳ͍ʣ w .JDSP4PGU͕ࣗ5ZQF4ZOUBYΛఏҊ͍ͯ͠Δͱ͍͏͜ͱɺ൴Β͕ࣗ ʮ5ZQF4DSJQUͷߏจेʹݻ·͖ͬͯͨʯͱߟ͍͑ͯΔূࠨʁ
จ๏͕ඪ४Խ͞ΕΔҙຯ SE1BSUZ5SBOTQJMFS w ۙར༻͕ͨΓલʹͳΓͭͭ͋ΔɺCBCFM TXD FTCVJMEͳͲͷSEύʔς ΟτϥϯεύΠϥ w ͜ΕΒͷπʔϧ5ZQF4DSJQU༻ͷߏจղੳثΛ࣮͍ͯ͠Δ w
จ๏ͷඪ४ԽʹΑΓɺ҆ఆͨ͠ߏจղੳ͕ߦ͑ΔΑ͏ʹͳΔ w Ϗϧυ༻ͷτϥϯεύΠϥʹٻΊΒΕ͍ͯΔͷʮܕΞϊςʔγϣϯͷআʯ ͚ͩ XFCQBDLճ͢ͱ͖ʹܕνΣοΫ͍Βͳ͍
Ͳ͏උ͑Δ͔ w ݱঢ়4UBHFͰ͋Γɺࠓ͙͢ϢʔβʔϥϯυͰͲ͏͜͏͢ΔͰͳ͍ w Ұ෦ͷϥϯλΠϜʹӨڹΛٴ΅͢จ๏ FHOBNFTQBDF FOVN FUD ʹ͍ͭ ͯɺ5ZQF1SPQPTBMͷൣғ֎ͱ͞Ε͍ͯΔ
w ʮ͜ΕΒͷػೳΛੵۃతʹΘͳ͍Α͏ʹ͓ͯ͘͠ʯͷΞϦ
5IBOLZPV