2 // { dg-options "-std=c++17 -fconcepts" }
4 template <class T, class U>
5 concept bool SameAs = __is_same_as(T, U);
8 concept bool R1 = requires (T& t) {
10 { t.end() } -> SameAs<T*>;
14 concept bool R2 = requires (T& t) {
15 { t.end() } -> SameAs<T*>;
24 constexpr bool f() { return true; }
27 constexpr bool g() { return true; }
29 static_assert(f<foo>()); // { dg-error "" }
30 static_assert(g<foo>()); // { dg-error "" }