pub unsafe extern "C" fn ucl_parser_register_macro(
parser: *mut ucl_parser,
macro_name: *const c_char,
handler: ucl_macro_handler,
ud: *mut c_void,
)pub unsafe extern "C" fn ucl_parser_register_macro(
parser: *mut ucl_parser,
macro_name: *const c_char,
handler: ucl_macro_handler,
ud: *mut c_void,
)