Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/partial-spec6.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// PR c++/67152 // { dg-do compile { target c++17 } } // { dg-options "-fconcepts" } template <class T> concept bool HasType = requires { typename T::type; }; template<class T> struct trait { using type = void; }; struct has_type { using type = void; }; // Instantiation here trait<has_type>::type foo() {} // constrained version here. Type "has_type" would fail this // constraint so this partial specialization would not have been // selected. template<class T> requires !HasType<T> struct trait<T> { using type = void; };