__cpp_lib_expected 202211L [C++23]
__cpp_lib_freestanding_expected 202311L [C++26]
*/
#include <expected>
#include "test_macros.h"
#if TEST_STD_VER < 14
# ifdef __cpp_lib_expected
# error "__cpp_lib_expected should not be defined before c++23"
# endif
# ifdef __cpp_lib_freestanding_expected
# error "__cpp_lib_freestanding_expected should not be defined before c++26"
# endif
#elif TEST_STD_VER == 14
# ifdef __cpp_lib_expected
# error "__cpp_lib_expected should not be defined before c++23"
# endif
# ifdef __cpp_lib_freestanding_expected
# error "__cpp_lib_freestanding_expected should not be defined before c++26"
# endif
#elif TEST_STD_VER == 17
# ifdef __cpp_lib_expected
# error "__cpp_lib_expected should not be defined before c++23"
# endif
# ifdef __cpp_lib_freestanding_expected
# error "__cpp_lib_freestanding_expected should not be defined before c++26"
# endif
#elif TEST_STD_VER == 20
# ifdef __cpp_lib_expected
# error "__cpp_lib_expected should not be defined before c++23"
# endif
# ifdef __cpp_lib_freestanding_expected
# error "__cpp_lib_freestanding_expected should not be defined before c++26"
# endif
#elif TEST_STD_VER == 23
# ifndef __cpp_lib_expected
# error "__cpp_lib_expected should be defined in c++23"
# endif
# if __cpp_lib_expected != 202211L
# error "__cpp_lib_expected should have the value 202211L in c++23"
# endif
# ifdef __cpp_lib_freestanding_expected
# error "__cpp_lib_freestanding_expected should not be defined before c++26"
# endif
#elif TEST_STD_VER > 23
# ifndef __cpp_lib_expected
# error "__cpp_lib_expected should be defined in c++26"
# endif
# if __cpp_lib_expected != 202211L
# error "__cpp_lib_expected should have the value 202211L in c++26"
# endif
# if !defined(_LIBCPP_VERSION)
# ifndef __cpp_lib_freestanding_expected
# error "__cpp_lib_freestanding_expected should be defined in c++26"
# endif
# if __cpp_lib_freestanding_expected != 202311L
# error "__cpp_lib_freestanding_expected should have the value 202311L in c++26"
# endif
# else
# ifdef __cpp_lib_freestanding_expected
# error "__cpp_lib_freestanding_expected should not be defined because it is unimplemented in libc++!"
# endif
# endif
#endif