Issue 1011: next/prev wrong iterator type

Title: next/prev wrong iterator type
Status: c++11
Section: [iterator.operations]
Submitter: Alisdair Meredith

Created on 2009-03-11.00:00:00 last changed 161 months ago

Messages

msg313 (view)

Date: 2010-10-21.18:28:33

Proposed resolution:

Change header <iterator> synopsis [iterator.synopsis] as indicated:

// 24.4.4, iterator operations:
...
template <class InputForwardIterator>
  InputForwardIterator
  next(InputForwardIterator x, typename std::iterator_traits<InputForwardIterator>::difference_type n = 1);

Change [iterator.operations] before p.6 as indicated:

template <class InputForwardIterator>
  InputForwardIterator
  next(InputForwardIterator x, typename std::iterator_traits<InputForwardIterator>::difference_type n = 1);

msg312 (view)

Date: 2010-10-21.18:28:33

[ 2009-10 Santa Cruz: ]

Moved to Ready.

msg311 (view)

Date: 2009-10-14.00:00:00

[ 2009-10-14 Daniel provided de-conceptified wording. ]

msg310 (view)

Date: 2010-10-21.18:28:33

[ 2009-07 Frankfurt ]

Moved from Tentatively Ready to Open only because the wording needs to be tweaked for concepts removal.

msg309 (view)

Date: 2010-10-21.18:28:33

[ Batavia (2009-05): ]

We agree with the proposed resolution. Move to Tentatively Ready.

msg308 (view)

Date: 2009-03-11.00:00:00

Addresses UK 271

next/prev return an incremented iterator without changing the value of the original iterator. However, even this may invalidate an InputIterator. A ForwardIterator is required to guarantee the 'multipass' property.

History
Date	User	Action	Args
2011-08-23 20:07:26	admin	set	status: wp -> c++11
2010-10-21 18:28:33	admin	set	messages: + msg313
2010-10-21 18:28:33	admin	set	messages: + msg312
2010-10-21 18:28:33	admin	set	messages: + msg311
2010-10-21 18:28:33	admin	set	messages: + msg310
2010-10-21 18:28:33	admin	set	messages: + msg309
2009-03-11 00:00:00	admin	create