Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/diagnostic1.C @ 145:1830386684a0
gcc-9.2.0
author | anatofuz |
---|---|
date | Thu, 13 Feb 2020 11:34:05 +0900 |
parents | 84e7813d76e9 |
children |
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// PR c++/67159 // { dg-do compile { target c++17_only } } // { dg-options "-fconcepts" } template <class T, class U> concept bool SameAs = __is_same_as(T, U); template <class T> concept bool R1 = requires (T& t) { // { dg-message "in requirements" } { t.begin() } -> T; // { dg-error "no match" } { t.end() } -> SameAs<T*>; // { dg-message "does not satisfy" } }; template <class T> concept bool R2 = requires (T& t) { // { dg-message "in requirements" } { t.end() } -> SameAs<T*>; // { dg-message "does not satisfy" } }; struct foo { int* begin(); int* end(); }; R1{T} constexpr bool f() { return true; } R2{T} constexpr bool g() { return true; } static_assert(f<foo>()); // { dg-error "" } static_assert(g<foo>()); // { dg-error "" }