| // P2655R3 - common_reference_t of reference_wrapper Should Be a Reference Type |
| // Implemented as a DR against C++20 |
| // { dg-do compile { target c++20 } } |
| |
| #include <type_traits> |
| |
| #if __cpp_lib_common_reference != 202302L |
| # error "Feature-test macro __cpp_lib_common_reference has wrong value in <type_traits>" |
| #endif |
| |
| struct A { }; |
| struct B { operator A&() const; }; |
| |
| static_assert( std::is_same_v<std::common_reference_t<A&, const B&>, A&> ); |
| static_assert( std::is_same_v<std::common_reference_t<const B&, A&>, A&> ); |
