Function insert

3rd/nlohmann_json/include/nlohmann/json.hpp:5765–5781

! @brief inserts element Inserts element @a val before iterator @a pos. @param[in] pos iterator before which the content will be inserted; may be the end() iterator @param[in] val element to insert @return iterator pointing to the inserted @a val. @throw type_error.309 if called on JSON values other than arrays; example: `"cannot use insert() with string"` @t

    @since version 1.0.0
    */
    iterator insert(const_iterator pos, const basic_json& val)
    {
        // insert only works for arrays
        if (JSON_HEDLEY_LIKELY(is_array()))
        {
            // check if iterator pos fits to this JSON value
            if (JSON_HEDLEY_UNLIKELY(pos.m_object != this))
            {
                JSON_THROW(invalid_iterator::create(202, "iterator does not fit current value", *this));
            }

            // insert to array and return iterator
            return insert_iterator(pos, val);
        }

        JSON_THROW(type_error::create(309, "cannot use insert() with " + std::string(type_name()), *this));
    }

    /*!
    @brief inserts element