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### 104. Description of basic_string::operator[] is unclear

Section: 23.4.3.5 [string.capacity] Status: NAD Submitter: AFNOR Opened: 1998-10-07 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

It is not clear that undefined behavior applies when pos == size () for the non const version.

Proposed resolution:

Rewrite as: Otherwise, if pos > size () or pos == size () and the non-const version is used, then the behavior is undefined.

Rationale:

The Standard is correct. The proposed resolution already appears in the Standard.