On 12/12/2022 12:18, Jonathan Wakely wrote:
If Clang already treats __is_signed as a conditionally-active built-in, it should do the same for __is_unsigned.
Wasn't aware of that special handling of __is_signed. Filed <https://reviews.llvm.org/D139847> "Also allow __is_unsigned to be used as an identifier" now (just in case, even if the use in libstdc++ is already gone again).
