[Qt-interest] Passing QList<QStringList> as arguments

[Thiago Macieira]

On Wednesday 25. August 2010 00.45.48 John Weeks wrote:
> C++ does have dynamic_cast<>() that allows you (if you have run-time  
> type information enabled) to get a pointer to a derived class if you  
> hold a pointer to the base class. You have to be ready for an  
> exception to be thrown if the pointer you hold really isn't a pointer  
> to the derived class, though.

dynamic_cast of pointers doesn't throw. It returns zero if the cast failed.

dynamic_casting references, however, does throw std::bad_cast if the cast 
failed.

PS: I've always used upcast and downcast as towards derived and towards base, 
respectively. See:

http://qt.gitorious.org/qt/qt/blobs/master/tests/auto/qsharedpointer/tst_qsharedpointer.cpp#line484
http://qt.gitorious.org/qt/qt/blobs/master/tests/auto/qsharedpointer/tst_qsharedpointer.cpp#line552
-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
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