| // { dg-options "-std=gnu++23 -frtti" } |
| // { dg-do compile { target c++23 } } |
| // { dg-additional-options "-fdelete-null-pointer-checks" } |
| |
| #include <typeinfo> |
| |
| #ifndef __cpp_lib_constexpr_typeinfo |
| # error "Feature-test macro for constexpr typeinfo missing in <typeinfo>" |
| #elif __cpp_lib_constexpr_typeinfo != 202106L |
| # error "Feature-test macro for constexpr typeinfo has wrong value in <typeinfo>" |
| #endif |
| |
| struct X { }; |
| |
| constexpr bool |
| test01() |
| { |
| if (typeid(int) == typeid(long)) |
| return false; |
| |
| if (typeid(int) != typeid(int)) |
| return false; |
| |
| struct X { virtual ~X() { } }; |
| |
| if (typeid(X) != typeid(X)) |
| return false; |
| |
| if (typeid(X) == typeid(::X)) |
| return false; |
| |
| if (typeid(X) == typeid(int)) |
| return false; |
| |
| const auto& ti_x = typeid(X); |
| if (ti_x != ti_x) |
| return false; |
| |
| if (ti_x != typeid(X)) |
| return false; |
| |
| struct Y { }; |
| if (ti_x == typeid(Y)) |
| return false; |
| |
| return true; |
| } |
| |
| static_assert( test01() ); |
