__cpp_lib_syncbuf 201803L [C++20]
*/
#include <syncstream>
#include "test_macros.h"
#if TEST_STD_VER < 14
# ifdef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should not be defined before c++20"
# endif
#elif TEST_STD_VER == 14
# ifdef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should not be defined before c++20"
# endif
#elif TEST_STD_VER == 17
# ifdef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should not be defined before c++20"
# endif
#elif TEST_STD_VER == 20
# if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)
# ifndef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should be defined in c++20"
# endif
# if __cpp_lib_syncbuf != 201803L
# error "__cpp_lib_syncbuf should have the value 201803L in c++20"
# endif
# else
# ifdef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)' is not met!"
# endif
# endif
#elif TEST_STD_VER == 23
# if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)
# ifndef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should be defined in c++23"
# endif
# if __cpp_lib_syncbuf != 201803L
# error "__cpp_lib_syncbuf should have the value 201803L in c++23"
# endif
# else
# ifdef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)' is not met!"
# endif
# endif
#elif TEST_STD_VER > 23
# if !defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)
# ifndef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should be defined in c++26"
# endif
# if __cpp_lib_syncbuf != 201803L
# error "__cpp_lib_syncbuf should have the value 201803L in c++26"
# endif
# else
# ifdef __cpp_lib_syncbuf
# error "__cpp_lib_syncbuf should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM)' is not met!"
# endif
# endif
#endif