This page is a snapshot from the LWG issues list, see the Library Active Issues List for more information and the meaning of NAD status.
Section: 25.5.1.6 [reverse.iter.elem] Status: NAD Submitter: David Abrahams Opened: 2012-10-30 Last modified: 2021-06-06
Priority: Not Prioritized
View all other issues in [reverse.iter.elem].
View all issues with NAD status.
Discussion:
This note in [reverse.iter.op.star]/2:
[ Note: This operation must use an auxiliary member variable rather than a temporary variable to avoid returning a reference that persists beyond the lifetime of its associated iterator. (See 24.2.) —end note ]
is incorrect because such iterator implementations are ruled out by 25.3.5.5 [forward.iterators]/6, where it says:
If a and b are both dereferenceable, then a == b if and only if *a and *b are bound to the same object.
[2013-04-20, Bristol]
Alisdair: sugested to strike the "exposition only" member.
Daniel: we must check that it wouldn't conflict with a previous solution to another issue. Dietmar: This is an issue but the proposing word is not correct. When we have proxies inside the sequence. Solution: NAD thanks to a contrieved example by Dietmar.Proposed resolution:
Strike the note, [reverse.iter.op.star]/2:
[ Note: This operation must use an auxiliary member variable rather than a temporary variable to avoid returning a reference that persists beyond the lifetime of its associated iterator. (See 24.2.) —end note ]