Function operator+=

Source/Utils/json.hpp:21737–21741

! @brief add an object to an array @copydoc push_back(basic_json&&) */

        @copydoc push_back(basic_json&&)
        */
        reference operator+=(basic_json&& val)
        {
            push_back(std::move(val));
            return *this;
        }

        /*!
        @brief add an object to an array