[Bug libstdc++/109162] C++23 improvements to std::format

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109162

--- Comment #24 from Tomasz Kamiński <tkaminsk at gcc dot gnu.org> ---
> Although it doesn't seem to be in the upcoming GCC-15 release.

GCC 15.1 has everything expect formatters for adaptors. So ranges, debug
presentation, pair, tuple and std::vector<bool>::reference will be in.