Function find

include/boost/parser/detail/text/algorithm.hpp:58–66

        sentinel. */
    template<typename BidiIter, typename Sentinel, typename T>
    BidiIter find(BidiIter first, Sentinel last, T const & x)
    {
        while (first != last) {
            if (*first == x)
                return first;
            ++first;
        }
        return first;
    }

    /** A range-friendly compliment to `std::find()`; returns an iterator to
        the first element not equal to `x`. */