[Webkit-unassigned] [Bug 41237] New: HashSet iterators are quasi-mutable.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=41237

           Summary: HashSet iterators are quasi-mutable.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Template Framework
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: nlawrence at apple.com
                CC: ggaren at apple.com, slewis at apple.com,
                    nlawrence at apple.com



Nathan Lawrence <nlawrence at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #59813|                            |review?
               Flag|                            |


Created an attachment (id=59813)
 --> (https://bugs.webkit.org/attachment.cgi?id=59813)
Patch

Changing the value through dereferencing an iterator will not change the behavior of methods like contains or find, but will change the behavior of iterating.  For example, under the current implementation the following code would print "2, 4, 3" but myHashSet.contains(4) would return false.

HashSet<int> myHashSet;

myHashSet.add(1);
myHashSet.add(2);
myHashSet.add(3);

int& one = myHashSet.find(1);
one = 2;

 for (HashSet<int>::iterator i = myHashSet.begin(); i != myHashSet.end(); ++i)
        fprintf(stderr, "%u, ", i);

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