Issue 132: list::resize description uses random access iterators (original) (raw)

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132. list::resize description uses random access iterators

Section: 23.3.11.3 [list.capacity] Status: TC1 Submitter: Howard Hinnant Opened: 1999-03-06 Last modified: 2016-01-28

Priority: Not Prioritized

View all other issues in [list.capacity].

View all issues with TC1 status.

Discussion:

The description reads:

-1- Effects:

     if (sz > size())
       insert(end(), sz-size(), c);
     else if (sz < size())
       erase(begin()+sz, end());
     else
       ;                           //  do nothing

Obviously list::resize should not be specified in terms of random access iterators.

Proposed resolution:

Change 23.3.11.3 [list.capacity] paragraph 1 to:

Effects:

     if (sz > size())
       insert(end(), sz-size(), c);
     else if (sz < size())
     {
       iterator i = begin();
       advance(i, sz);
       erase(i, end());
     }

[Dublin: The LWG asked Howard to discuss exception safety offline with David Abrahams. They had a discussion and believe there is no issue of exception safety with the proposed resolution.]