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rintaro 12/11/2019 3:35 AM
https://github.com/apple/swift-evolution/blob/master/proposals/0252-keypath-dynamic-member-lookup.md で多少は楽できるかも
apple/swift-evolution
This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution
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3:36 AM
プロパティ限定になっちゃうかもだけど。