https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120917
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jason at gcc dot gnu.org --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- This is a bit of a mess, because the warning used to suggest -fconcepts not -fconcepts-ts $ g++12 -std=c++17 auto.cc -c -pedantic auto.cc:2:12: warning: use of 'auto' in parameter declaration only available with '-std=c++20' or '-fconcepts' 2 | void f (S <auto>); | ^~~~