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### 2285. `make_reverse_iterator`

Section: 25.5.1 [reverse.iterators] Status: C++14 Submitter: Zhihao Yuan Opened: 2013-08-27 Last modified: 2016-01-28

Priority: Not Prioritized

View all other issues in [reverse.iterators].

View all issues with C++14 status.

Discussion:

We have `make_move_iterator`, but not `make_reverse_iterator`, which is also useful when dealing with some types without an `rbegin`/`rend` support (like, C strings).

[2013-09 Chicago]

Billy: reviewed it last night STL: has suggested prior, but denied for complexity

Billy: Alisdair wanted to review for `reverse(reverse())`;

STL: likes the issue, was like him

Stefanus: likes definitions, places where things should be

STL: for consistency with `make_move_iterator`

Stefanus: minor editorial issue - subdivision in these 2 sections is different from [move.iter]. See 25.5.4.9 [move.iter.nonmember]

STL: motion to move to Ready

Move to Ready

Proposed resolution:

This wording is relative to N3691.

1. Change header `<iterator>` synopsis, 25.2 [iterator.synopsis] as indicated:

   >     namespace std {
   >       […]
   >       template <class Iterator>
   >         reverse_iterator<Iterator> operator+(
   >           typename reverse_iterator<Iterator>::difference_type n,
   >           const reverse_iterator<Iterator>& x);

   >       template <class Iterator>
   >         reverse_iterator<Iterator> make_reverse_iterator(Iterator i);

   >     }

2. Change class template `reverse_iterator` synopsis, 25.5.1.2 [reverse.iterator] as indicated:

   >     namespace std {
   >       […]
   >       template <class Iterator>
   >         reverse_iterator<Iterator> operator+(
   >           typename reverse_iterator<Iterator>::difference_type n,
   >           const reverse_iterator<Iterator>& x);

   >       template <class Iterator>
   >         reverse_iterator<Iterator> make_reverse_iterator(Iterator i);

   >     }

3. After [reverse.iter.opsum] add the following new sub-clause to [reverse.iter.ops]:

   >     template <class Iterator>
   >       reverse_iterator<Iterator> make_reverse_iterator(Iterator i);

   > > -?- Returns: `reverse_iterator<Iterator>(i)`.