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Showing content from https://cplusplus.github.io/LWG/issue1525 below:

Effects of resize(size()) on a vector

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: 23.3.13.3 [vector.capacity] Status: C++11 Submitter: BSI Opened: 2011-03-24 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

Addresses GB-117

23.3.13.3 [vector.capacity] p. 9 (Same as for 23.3.5.3 [deque.capacity] p. 1 i.e. deque::resize). There is no mention of what happens if sz==size(). While it obviously does nothing I feel a standard needs to say this explicitely.

Suggested resolution:

Append "If sz == size(), does nothing" to the effects.

[2011-03-24 Daniel comments]

During the edit of this issue some non-conflicting overlap with 2033⁽ⁱ⁾ became obvious. CopyInsertable should be MoveInsertable and there is missing the DefaultConstructible requirements, but this should be fixed by 2033⁽ⁱ⁾.

Proposed resolution:

Change 23.3.13.3 [vector.capacity] p. 9 as follows:

void resize(size_type sz);

9 Effects: If sz < = size(), equivalent to erase(begin() + sz, end());. If size() < sz, appends sz - size() value-initialized elements to the sequence.

10 Requires: T shall be CopyInsertable into *this.

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