Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/friend1.C @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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// { dg-options "-std=c++17 -fconcepts" } template<typename T> concept bool Eq() { return requires(T t) { t == t; }; } struct Nt { template<Eq T> friend void f(T) { } } nt; template<typename T> struct S; template<Eq T> void proc(S<T>*); template<typename T> struct S { friend bool operator==(S, S) requires Eq<T>() { return true; } friend void proc<>(S*); // { dg-error "does not match any template declaration" } }; struct X { } x; int main() { // f(0); // OK f(nt); // { dg-error "cannot call" } f(x); // { dg-error "3:'f' was not declared" } S<int> si; si == si; // OK S<X> sx; sx == sx; // { dg-error "no match" } }