20/10/30 09:49:07.73 7Hoin+z3.net
>>322
URLﾘﾝｸ(timsong-cpp.github.io)
> If the destination type is signed, the value is unchanged if it can be represented in the destination type; otherwise, the value is implementation-defined.
未定義ではないね。移植性は損なわれるけど。
20/10/30 09:49:07.73 7Hoin+z3.net
>>322
URLﾘﾝｸ(timsong-cpp.github.io)
> If the destination type is signed, the value is unchanged if it can be represented in the destination type; otherwise, the value is implementation-defined.
未定義ではないね。移植性は損なわれるけど。