Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp2a/concepts-pr71368.C @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
children |
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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> ); }