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2285.make_reverse_iterator

Section: 24.5.1[reverse.iterators]Status:C++14Submitter: Zhihao YuanOpened: 2013-08-27Last modified: 2016-01-28

Priority:Not Prioritized

View all otherissues in [reverse.iterators].

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Discussion:

We havemake_move_iterator, but notmake_reverse_iterator, whichis also useful when dealing with some types without anrbegin/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 forreverse(reverse());

STL: likes the issue, was like him

Stefanus: likes definitions, places where things should be

STL: for consistency withmake_move_iterator

Stefanus: minor editorial issue - subdivision in these 2 sections is different from [move.iter]. See 24.5.4.9[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, 24.2[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 templatereverse_iterator synopsis, 24.5.1.2[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).