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// PR c++/67240
// { dg-options "-std=c++1z -fconcepts" }
int foo(int x)
{
return x;
}
template <typename T>
concept bool C1 = requires (T x) {
{foo(x)} -> int&;
};
template <typename T>
concept bool C2 = requires (T x) {
{foo(x)} -> void;
};
static_assert( C1<int> ); // { dg-error "assert" }
static_assert( C2<int> ); // { dg-error "assert" }
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