| // PR c++/69009 |
| // { dg-do compile { target c++14 } } |
| |
| using _uchar = char; |
| using _size_t = decltype(sizeof(_uchar)); |
| using size_t = _size_t; |
| template <class T, T> struct integral_constant; |
| template <bool b> using bool_constant = integral_constant<bool, b>; |
| template <class> constexpr auto tuple_size_v = 0; |
| template <class T> auto const tuple_size_v<T const volatile> = tuple_size_v<T>; |
| template <class T> |
| using tuple_size = integral_constant<size_t, tuple_size_v<T>>; |
| template <typename Base, typename Deriv> |
| using is_base_of = bool_constant<__is_base_of(Base, Deriv)>; |
| template <class T, size_t N> void test() { |
| is_base_of<integral_constant<size_t, N>, tuple_size<T>> value( |
| is_base_of<integral_constant<size_t, N>, tuple_size<const volatile T>>); |
| } |
| void foo() { test<int, 0>; } |
