if (common_range_length >= given_range_length)
{
- iterator ret_b = leftmost_it(nd_it);
+ iterator ret_b = this->leftmost_it(nd_it);
- iterator ret_e = rightmost_it(nd_it);
+ iterator ret_e = this->rightmost_it(nd_it);
return (std::make_pair(ret_b, ++ret_e));
}