https://github.com/apple/swift-evolution/blob/main/proposals/0295-codable-synthesis-for-enums-with-associated-values.md#synthesized-code

apple/swift-evolution

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - apple/swift-evolution

2:14 PM

unsafelyUnwrapped の利用例こんなところで見つけた

2:14 PM

https://developer.apple.com/documentation/swift/optional/1641793-unsafelyunwrapped

2:15 PM

However, in optimized builds (-O), no check is performed to ensure that the current instance actually has a value.

-O でさえチェックコストが消えるらしい。