| // // PR c++/65202 |
| // { dg-do compile { target c++14 } } |
| // { dg-additional-options "-Wno-return-type" } |
| |
| template <typename T> struct is_move_constructible; |
| template <typename T> struct is_move_assignable; |
| template <int, typename T> using enable_if_t = int; |
| namespace adl { |
| template < |
| typename L, typename R, |
| enable_if_t<is_move_constructible<L>() && is_move_assignable<L>(), int>...> |
| constexpr auto adl_swap(L &l, R &r) -> decltype(swap(l, r)) { |
| return; |
| } |
| template <typename L, typename R> |
| auto swap(L &l, R &r) noexcept(noexcept(adl::adl_swap(l, r))) |
| -> decltype(adl::adl_swap(l, r)); |
| namespace ns { |
| template <typename T> struct foo {}; |
| template <typename T> void swap(foo<T> &, foo<T> &); |
| struct bar; |
| |
| int main() |
| { |
| foo<ns::bar> f; |
| adl::swap(f, f) // { dg-error "expected ';'" } |
| } // { dg-error "2:expected" } |