24 Iterators library [iterators]

24.5 Iterator adaptors [predef.iterators]

24.5.3 Move iterators [move.iterators]

24.5.3.3 move_iterator operations [move.iter.ops]

24.5.3.3.10 move_iterator::operator- [move.iter.op.-]

move_iterator operator-(difference_type n) const;

Returns: move_iterator(current - n).