void DfsDocument(rapidjson::Value val) {

//    cout << val.GetType() << endl;

    if (!val.GetType()) return;

    switch (val.GetType()) {

    case rapidjson::kNumberType:

        cout << val.GetInt() << endl;

        break;

    case rapidjson::kStringType:

        cout << val.GetString() << endl;

        break;

    case rapidjson::kArrayType:

        for (rapidjson::Value::ValueIterator itr = val.GetArray().begin();

             itr != val.GetArray().end(); ++itr) {

          rapidjson::Value a;

          a = *itr;

          DfsDocument(std::move(a));

        }

        break;

    case rapidjson::kObjectType:

        for (rapidjson::Value::MemberIterator itr = val.GetObject().begin();

             itr != val.GetObject().end(); ++itr) {

            cout << itr->name.GetString() << endl;

            rapidjson::Value a;

            a = itr->value;

            DfsDocument(std::move(a));

        }

    default:

        break;

    }

    return;

}