bool match_(match_state<BidiIter> &state, Next const &next, mpl::true_) const
        {
            sub_match_impl<BidiIter> &br = state.sub_match(this->mark_number_);

            if(this->max_ > br.repeat_count_)
            {
                ++br.repeat_count_;
                // loop back to the expression "pushed" in repeat_begin_matcher::match
                if(next.top_match(state, this->back_))
                {
                    return true;
                }
                else if(--br.repeat_count_ < this->min_)
                {
                    return false;
                }
            }

            // looping finished, continue matching the rest of the pattern
            return next.skip_match(state);
        }
        bool match_(match_state<BidiIter> &state, Next const &next, mpl::false_) const
        {
            sub_match_impl<BidiIter> &br = state.sub_match(this->mark_number_);

            if(this->min_ <= br.repeat_count_)
            {
                if(next.skip_match(state))
                {
                    return true;
                }
            }

            if(this->max_ > br.repeat_count_)
            {
                ++br.repeat_count_;
                if(next.top_match(state, this->back_))
                {
                    return true;
                }
                --br.repeat_count_;
            }

            return false;
        }