When a <<ref_value>> is formatted to a {std_ostream}, the result is serialized JSON as if by calling <<ref_serialize>>.
When a <当将 <<ref_value>> is formatted to a {std_ostream}, the result is serialized JSON as if by calling <<> 输出到 {std_ostream} 时,其结果等同于调用 <<ref_serialize>> 所生成的序列化 JSON。</ref_serialize></ref_value>.
When a <当将 <<ref_value>> is formatted to a {std_ostream}, the result is serialized JSON as if by calling <<> 输出到 {std_ostream} 时,其结果等同于调用 <<ref_serialize>> 所生成的序列化 JSON。</ref_serialize></ref_value>.