https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93739
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
> template<typename T>
> [[gnu::warning("your type here")]]
> bool print_type() { return true; }
>
> int i;
> bool b = print_type<int>();
Oops, that was meant to be print_type<decltype(i)>()
The output is:
warn.cc: In function ‘void __static_initialization_and_destruction_0(int,
int)’:
warn.cc:6:33: warning: call to ‘print_type<int>’ declared with attribute
warning: your type here [-Wattribute-warning]
6 | bool b = print_type<decltype(i)>();
| ~~~~~~~~~~~~~~~~~~~~~~~^~
