Bug 26721 – Pointer to incomplete class type is not allowed compilation error with RVCT

• Component: WebCore Misc.
• Status: RESOLVED FIXED

[Laszlo Gombos]

Building accessibility\accessibilityimagemaplink.cpp fails with the following error (using the ARM RVCT compiler):

"WebKit\JavaScriptCore/wtf/PassRefPtr.h", line 43: Error:  #393: pointer to incomplete class type is not allowed
          ALWAYS_INLINE ~PassRefPtr() { if (UNLIKELY(m_ptr != 0)) m_ptr->deref(); }
                                                                  ^
          detected during instantiation of "WTF::PassRefPtr<T>::~PassRefPtr() [with T=WebCore::Event]"

[Laszlo Gombos]

Created attachment 31856 [details]
Include Event.h in Node.h instead of forward declaring the Event class

This bug is similar in nature to https://bugs.webkit.org/show_bug.cgi?id=24539. 

In this particular case "PassRefPtr<Event> underlyingEvent = 0" needs to know about the Event class definition .

[Laszlo Gombos]

I just run into some related discussion on WebKit-dev from 2008. Paul sheds some lights on the differences between GCC/MSVC and ARM RVCT.

http://lists.macosforge.org/pipermail/webkit-dev/2008-September/004799.html

[Darin Adler]

Comment on attachment 31856 [details]
Include Event.h in Node.h instead of forward declaring the Event class

We really don't want to include Event.h in every single file that includes Node.h. Lets remove the default value for underlyingEvent, and fix the callers to pass zero explicitly instead.

[Laszlo Gombos]

Created attachment 31901 [details]
Remove the default value for PassRefPtr<Event> args

Thanks Darin for the quick review. Removed some defaults from Node.h to eliminate the dependency on the Event class definition. RVCT no longer fails on this after these changes.

[Eric Seidel (no email)]

Committing to http://svn.webkit.org/repository/webkit/trunk ...
	M	WebCore/ChangeLog
	M	WebCore/dom/Document.cpp
	M	WebCore/dom/Node.cpp
	M	WebCore/dom/Node.h
Committed r45251
http://trac.webkit.org/changeset/45251