Type Definition crfsuite_sys::crfsuite_logging_callback

type crfsuite_logging_callback = Option<unsafe extern "C" fn(_: *mut c_void, _: *const c_char, _: *mut __va_list_tag) -> c_int>;

Type of callback function for logging. @param user Pointer to the user-defined data. @param format Format string (compatible with prinf()). @param args Optional arguments for the format string. @return int \c 0 to continue; non-zero to cancel the training.