https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96331
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Nicole from comment #0) > template<fixed_string NAME, typename TYPE> This is not valid. fixed_string is a class template, not a type and not a concept. So you can't use it as a template parameter. I don't think this is a bug.