[Bug libstdc++/59769] please add ios_base::__noreplace

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59769

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This should be done in the C++ standard, not just as a libstdc++ extension.