Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp2a/concepts-pr71368.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++/71368 // { dg-do compile { target c++2a } } template <class T, class U> concept Same = __is_same_as(T,U); struct inner; template<typename X> concept CompoundReq = requires { // fine with concrete type in trailing type, i.e. inner& instead of X& { X::inner_member() } -> Same<X&>; }; template<typename X> concept Concept = requires { { X::outer_member() } -> CompoundReq; }; struct inner { static inner& inner_member(); }; struct outer { static inner outer_member(); }; int main() { // fine static_assert( CompoundReq<inner> ); static_assert( CompoundReq<decltype( outer::outer_member() )> ); // ICE static_assert( Concept<outer> ); }