[Webkit-unassigned] [Bug 32363] New: [Chromium] Disallow assignment of WebVector<T> to WebVector<T>

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=32363

           Summary: [Chromium] Disallow assignment of WebVector<T> to
                    WebVector<T>
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: yurys at chromium.org


As comment in the top part of WebVector.h says WebVector::swap should be used
in such cases. If you write by mistake something as follows:

    WebVector<WebString> a(3);
    WebVector<WebString> b;
    b = a;

operator= automatically generated by compiler will be invoked as it takes
precedence over template version

    template <typename C>
    WebVector<T>& operator=(const C& other)

The default assignment operator will lead to a.m_ptr == b.m_ptr and to
destructor being called twice for the container elements. So either operator=
should have valid implementation or be disallowed explicitly.

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