https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97517
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2020-10-21
Status|UNCONFIRMED |NEW
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Naming the template parameter reduces the <template-parameter-1-1> part of the
diagnostic that isn't relevant to the bug:
template<typename T> struct Trait { static constexpr bool value = false; };
template<typename T> concept Concept = Trait<T>::value;
static_assert( Concept<decltype(nullptr)> );
c.C:5:16: error: static assertion failed
5 | static_assert( Concept<decltype(nullptr)> );
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
c.C:5:16: note: constraints not satisfied
c.C:3:30: required by the constraints of ‘template<class T> concept Concept’
c.C:3:50: note: the expression ‘Trait<T>::value [with T = ‘nullptr_type’ not
supported by simple_type_specifier‘nullptr_type’ not supported by
direct_abstract_declarator]’ evaluated to ‘false’
3 | template<typename T> concept Concept = Trait<T>::value;
| ^~~~~
