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Showing content from https://cplusplus.github.io/LWG/issue1415 below:

Iterator stability bans the short-string optimization

This page is a snapshot from the LWG issues list, see the Library Active Issues List for more information and the meaning of NAD Editorial status.

Section: 23.2.2 [container.requirements.general] Status: NAD Editorial Submitter: INCITS Opened: 2010-08-25 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

Requirements on iterators swapping allegiance would disallow the small-string optimization.

[ Resolved in Rapperswil by paper N3108. ]

Proposed resolution:

Add an exclusion for basic_string to the sentence beginning “Every iterator referring to an element...”. Add a sentence to 21.4.6.8/2 saying that iterators and references to string elements remain valid, but it is not specified whether they refer to the same string or the other string.

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