https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78872
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|WAITING |RESOLVED Resolution|--- |INVALID --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- You can't just declare new functions of std::locale, that type is controlled by the standard library, not by you. Please stop filing bugs here until you learn basic C++.