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comparison gcc/testsuite/g++.dg/concepts/var-templ2.C @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 // PR c++/67139
2 // { dg-options "-std=c++17 -fconcepts" }
3
4 template <class T>
5 constexpr typename T::type::value_type _v = T::type::value;
6
7 template <class T> concept bool IsTrue_() { return _v<T>; }
8
9 template <class T> concept bool Unpossible() {
10 return IsTrue_<T &&>();
11 }
12
13 template <class> constexpr bool unpossible() { return false; }
14 Unpossible{ T }
15 constexpr bool unpossible() { return true; }
16
17 static_assert((!unpossible<void>()), "");