| // PR c++/67018 | |
| // { dg-do compile { target c++20 } } | |
| template <typename T> | |
| constexpr bool Val = true; | |
| template <class I> | |
| concept InputIterator = requires (I i) { | |
| requires Val<decltype(i++)>; | |
| }; | |
| template <class I> | |
| concept ForwardIterator = InputIterator<I> && true; | |
| template<InputIterator> | |
| constexpr bool f() { return false; } | |
| template<ForwardIterator> | |
| constexpr bool f() { return true; } | |
| static_assert(f<int*>()); |