2017-05-27 18:10 GMT+02:00 Dennis Poon <den...@avidsoft.com.hk>: > > > Sven Barth via fpc-pascal wrote: >> >> The idea itself is valid, cause "(IMyInterfaceVar as TObject) as >> IMyInterface = IMyInterfaceVar" is true if and only if IMyInterface is >> a COM interface. If IMyInterface really is a CORBA interface as Dennis >> wrote then the compiler should already have complained at the "aObj := >> aInt as TObject" line as this type of conversion is*not* supported by >> CORBA interfaces (cause they don't provide QueryInterface() which is >> needed for this). At least for me the compiler*did* complain (both >> 3.0.2 and 3.1.1) when I tested this. >> So the question is: is IMyInterface indeed a CORBA interface? If so >> then why does the compiler not complain? If not then why doesn't it >> work? For both cases a full example would be needed to investigate >> this. >> >> Regards, >> Sven > > Sorry, I got it wrong. The interface was in fact COM style instead of CORBA. > > In case of COM interface, why > > var > aInt : IMyInterface; > aObj : TObject; > begin > .... > .... > ... > aInt := MyList.Items[0]; > > aObj := aInt as TObject; > > why sometimes (not always) aInt <> (aObj as IMyInterface ) ?
Would you please provide a full, yet simple as possible example that shows this? I can't reproduce it with merely code fragments as for me it works. Regards, Sven _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
