difference_type index index_iterator index_iterator index_iterator iterator_category operator* operator++ operator+= operator- operator-- operator== pointer reference value_type

operator- template<typename R > difference_type operator- ( const index_iterator< R > & lhs, const index_iterator< R > & rhs ) friend Computes the distance between two iterators. Parameters lhs,rhs The iterators to compare. Returns lhs.index() - rhs.index()