[Bug c++/120917] warning: use of 'auto' in template argument only available with '-fconcepts-ts'

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120917

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> So if GCC never told you it was related to -fconcepts-ts and you never
> needed to use -fconcepts-ts to enable it, then you would never have seen the
> warning that -fconcepts-ts is deprecated.

On the other hand, GCC 14 warned about it correctly, so there was a deprecation
period before it was removed. It didn't just get completely removed with no
warning.