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view gcc/testsuite/g++.dg/cpp2a/concepts-pr68683.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
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date | Thu, 13 Feb 2020 11:34:05 +0900 |
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// PR c++/68683 // { dg-do compile { target c++2a } } template <typename, typename> struct is_same { static constexpr bool value = true; }; template <typename T, typename U> concept Same = is_same<T, U>::value; template <typename T> concept Integral = requires { { T () } -> Same<typename T::value_type>; }; struct A { using value_type = bool; }; int main () { Integral<A>; Integral<A>; return 0; }