On Friday, January 06, 2012 19:09:26 Thiago Macieira wrote: > If the method accepted a QFile pointer before, then a class derived from > QFile will automatically downcast to the type.
This could be a downcast-vs-upcast definition mismatch in your understandings? I think David is saying that a method which takes a QFile* would have to qobject_cast<QSaveFile*>(file) to call its rollback method if it were a separate class. Of course it's also common to have methods that do writing to take a QIODevice*. Does it make any sense to add a virtual rollback() to that (which obviously would do nothing in many overrides)? Thanks, -- Stephen Kelly <stephen.ke...@kdab.com> | Software Engineer KDAB (Deutschland) GmbH & Co.KG, a KDAB Group Company www.kdab.com || Germany +49-30-521325470 || Sweden (HQ) +46-563-540090 KDAB - Qt Experts - Platform-Independent Software Solutions
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