_value_output_stream(std::basic_ostream& stream, const T& value) {
// 为 null的指针输出...& stream, const std::vector>& format, int& idx) {
}...>
typename void _sm_log_output(std::basic_ostream& stream, const std::vector& stream, const char* file, int line, const std::basic_string& format...void sm_log(std::basic_ostream& stream, const char* file, int line, const E* format, Args...args