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Showing content from https://cplusplus.github.io/LWG/issue1420 below:

Effects of resize(size()) on a list

This page is a snapshot from the LWG issues list, see the Library Active Issues List for more information and the meaning of C++11 status.

Section: 23.3.11.3 [list.capacity] Status: C++11 Submitter: BSI Opened: 2010-08-25 Last modified: 2016-01-28

Priority: Not Prioritized

View all other issues in [list.capacity].

View all issues with C++11 status.

Discussion:

Addresses GB-115

There is no mention of what happens if sz==size(). While it obviously does nothing I feel a standard needs to say this explicitely.

[ Resolution proposed in ballot comment ]

Express the semantics as pseudo-code similarly to the way it is done for the copying overload that follows (in p3). Include an else clause that does nothing and covers the sz==size() case.

[ 2010 Batavia ]

Accepted with a simplified resolution turning one of the < comparisons into <=.

Proposed resolution:

Ammend [list.capacity] p1:

void resize(size_type sz);

Effects: If sz < = size(), equivalent to list<T>::iterator it = begin(); advance(it, sz); erase(it, end());. If size() < sz, appends sz - size() default constructed value initialized elements to the sequence .

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