Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/var-templ2.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
---|---|
date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | 84e7813d76e9 |
children |
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// PR c++/67139 // { dg-do compile { target c++17_only } } // { dg-options "-fconcepts" } template <class T> constexpr typename T::type::value_type _v = T::type::value; template <class T> concept bool IsTrue_() { return _v<T>; } template <class T> concept bool Unpossible() { return IsTrue_<T &&>(); } template <class> constexpr bool unpossible() { return false; } Unpossible{ T } constexpr bool unpossible() { return true; } static_assert((!unpossible<void>()), "");