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view gcc/testsuite/g++.dg/concepts/var-concept3.C @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children 84e7813d76e9
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// { dg-options "-std=c++17 -fconcepts" }

template<typename T>
  concept bool C1 = __is_class(T);

template<typename T>
  concept bool C2() { return __is_class(T); }

template<typename T>
  constexpr bool C3 = __is_class(T);


template<typename U>
  requires C1<U>() // { dg-error "" }
  void f1(U) { }

template<typename U>
  requires C2<U> // { dg-error "invalid reference" }
  void f2(U) { }

template<C3 T>  // { dg-error "not a type" }
  void f(T) { } // { dg-error "" }