Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp2a/concepts-friend1.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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// { dg-do compile { target c++2a } } template<typename T> concept Eq = requires(T t) { t == t; }; // { dg-message "in requirements" } 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 "" } f(x); // { dg-error "3:'f' was not declared" } S<int> si; si == si; // OK S<X> sx; sx == sx; // { dg-error "no match" } }