Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/concepts/var-concept3.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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// { dg-do compile { target c++17_only } } // { dg-options "-fconcepts" } template<typename T> concept bool C1 = __is_class(T); template<typename T> concept bool C2() { return __is_class(T); } template<typename T> constexpr bool C3 = __is_class(T); template<typename U> requires C1<U>() // { dg-error "cannot be used as a function" } void f1(U) { } template<typename U> requires C2<U> // { dg-error "must be called" } void f2(U) { } template<C3 T> // { dg-error "not a type" } void f(T) { } // { dg-error "declared void|not declared" } void foo() { struct S { } s; f2(s); // f2(0); }