[Bug c++/109763] GCC accepts invalid program involving decltype(classtype::memberfunction) when used with concepts

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109763

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Gcc correctly accepts this:
template <int t> constexpr bool d = true;
template < typename T >
concept test = d<T::value>;

Without a typename as T::value here refers to a value for the non-type template
argument.