[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 #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 51953
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51953&action=edit
Implement std::ios_base::__noreplace for C++23

TODO: tests