1 // { dg-options "-std=c++17 -fconcepts" }
3 template <class> struct all_same {
4 static constexpr bool value = 1;
6 template <class T> concept bool Assignable
9 requires all_same<decltype(t = 0)>::value;
12 template <class I> requires !Assignable<I>
17 int main() { dispatch<int *>(); }