[fpc-pascal] Implementing an interface force me to add _AddRef, _Release

[Graeme Geldenhuys]

Marc Weustink het geskryf:
> You cannot use casts like
> var
>    a: IMyObject;
>    b: IMyOtherObject;
> begin
>    b := a as IMyOtherObject;
> 
> or functions like supports() (which uses queryinterface)

I remember reading something about this a year or two ago in the mailing
list. As far as I remember, there was an alternative to do the same thing
with CORBA-style interfaces, but for the life of me I can't remember what
it was. I'll keeps searching to see if I can find the answers I am
referring to.

While searching I did find one of my old message threads. And the answers
to the questions I asked then, still elude me [4 years later]. :-(

  http://lists.freepascal.org/lists/fpc-devel/2007-November/012060.html


@Michael van Canneyt
Maybe the Language Reference documentation could be extended to include
such information? And maybe address the issues I mentioned the the message
thread link I posted. Many developers seem to struggle with this, and the
documentation seems the right place to address such info.



Regards,
  - Graeme -

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