9 Iterators library [iterators]

9.7 Iterator adaptors [iterators.predef]

9.7.3 Move iterators and sentinels [iterators.move]

9.7.3.2 move_iterator operations [move.iter.ops]

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

constexpr move_iterator operator-(difference_type n) const requires RandomAccessIterator<I>;

1

Effects: Equivalent to: return move_iterator(current - n);