Function skip_bom

3rd/nlohmann_json/single_include/nlohmann/json.hpp:8106–8118

! @brief skip the UTF-8 byte order mark @return true iff there is no BOM or the correct BOM has been skipped */

    @return true iff there is no BOM or the correct BOM has been skipped
    */
    bool skip_bom()
    {
        if (get() == 0xEF)
        {
            // check if we completely parse the BOM
            return get() == 0xBB && get() == 0xBF;
        }

        // the first character is not the beginning of the BOM; unget it to
        // process is later
        unget();
        return true;
    }

    void skip_whitespace()
    {