[Bug c++/104477] [C++23] Implement P2255R2, type trait to detect reference binding to temporary

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104477

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
They are defined by the standard, as library traits. The intrinsics are needed
to implement what the standard defines.