Function update

Source/Utils/json.hpp:22256–22279

! @brief updates a JSON object from another object, overwriting existing keys Inserts all values from JSON object @a j and overwrites existing keys. @param[in] j JSON object to read values from @throw type_error.312 if called on JSON values other than objects; example: `"cannot use update() with string"` @complexity O(N*log(size() + N)), where N

        @since version 3.0.0
        */
        void update(const_reference j)
        {
            // implicitly convert null value to an empty object
            if (is_null())
            {
                m_type = value_t::object;
                m_value.object = create<object_t>();
                assert_invariant();
            }

            if (JSON_HEDLEY_UNLIKELY(!is_object()))
            {
                JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(type_name())));
            }
            if (JSON_HEDLEY_UNLIKELY(!j.is_object()))
            {
                JSON_THROW(type_error::create(312, "cannot use update() with " + std::string(j.type_name())));
            }

            for (auto it = j.cbegin(); it != j.cend(); ++it)
            {
                m_value.object->operator[](it.key()) = it.value();
            }
        }

        /*!
        @brief updates a JSON object from another object, overwriting existing keys