| 152 | |
| 153 | template<class BidirectionalIterator> |
| 154 | BidirectionalIterator |
| 155 | prev(BidirectionalIterator it, |
| 156 | typename iterator_traits<BidirectionalIterator>::difference_type n = 1) |
| 157 | { |
| 158 | advance(it, -n); |
| 159 | |
| 160 | return it; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * 24.5.1, reverse iterator: |