https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106749
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- Much already done in gcc-11 and gcc-12: https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2023 See also https://en.cppreference.com/w/cpp/compiler_support#C.2B.2B23_library_features
