Function empty

Source/Utils/json.hpp:21420–21448

! @brief checks whether the container is empty. Checks if a JSON value has no elements (i.e. whether its @ref size is `0`). @return The return value depends on the different types and is defined as follows: Value type | return value ----------- | ------------- null | `true` boolean

        @since version 1.0.0
        */
        bool empty() const noexcept
        {
            switch (m_type)
            {
            case value_t::null:
            {
                // null values are empty
                return true;
            }

            case value_t::array:
            {
                // delegate call to array_t::empty()
                return m_value.array->empty();
            }

            case value_t::object:
            {
                // delegate call to object_t::empty()
                return m_value.object->empty();
            }

            default:
            {
                // all other types are nonempty
                return false;
            }
            }
        }

        /*!
        @brief returns the number of elements