Function toString

eval/CIPO_evaluation/common/gason.h:72–75

        return fval;
    }
    char *toString() const {
        assert(getTag() == JSON_STRING);
        return (char *)getPayload();
    }
    JsonNode *toNode() const {
        assert(getTag() == JSON_ARRAY || getTag() == JSON_OBJECT);
        return (JsonNode *)getPayload();