[Bug c++/71463] [6/7 regression] unexpected warning: ignoring function return attributes on template argument

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71463

--- Comment #7 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #6)
> I didn't know that GCC considers attribute warn_unused_result part of the
> function type.  When you say that most of these attributes apply to the
> function type, which others are you referring to?

Other attributes that apply to a function type: nonnull, returns_nonnull,
sentinel, alloc_size, alloc_align, assume_aligned, format, format_arg.

I don't know why they were defined this way; I imagine it was to support using
them on function pointers.