Function equal

include/boost/parser/detail/text/algorithm.hpp:259–266

        typename Iter2,
        typename Sentinel2>
    bool equal(Iter1 first1, Sentinel1 last1, Iter2 first2, Sentinel2 last2)
    {
        for (; first1 != last1 && first2 != last2; ++first1, ++first2) {
            if (*first1 != *first2)
                return false;
        }
        return first1 == last1 && first2 == last2;
    }

    /** Sentinel-friendly version of `std::mismatch()`. */
    template<