Method message

system/lib/libcxx/src/system_error.cpp:228–234

} // namespace

string __do_message::message(int ev) const {
#if !_LIBCPP_HAS_THREADS
  return string(::strerror(ev));
#else
  return do_strerror_r(ev);
#endif
}

class _LIBCPP_HIDDEN __generic_error_category : public __do_message {
public: