2008/5/18 Marc Santhoff <[EMAIL PROTECTED]>: > When using a cast from an interface to an object the compiler warns > about the class types "TObject" and "IObserver" not being related. > > Since an implementor of in interface always will be a class type and any > class type at least inherits from TObject, I assume it is okay? > > Is there a better method of handling this case?
Casting of Interfaces has always been known to me as a big NO-NO. I believe it's got something to do with how they are represented in the VMT or method table or something like that. I don't know the compiler internals. Why not simply use a InterfaceList or a generic Pointer list (as to not increment the interface reference counter). You can then add them to the list without having to cast to TObject. Regards, - Graeme - _______________________________________________ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
