Callbacks

[Philip Mötteli]

Hi


I have the problem, that a framework, that I have to port to 
Linux/Gnustep, makes use of Apples CoreFoundation library. Actually 
only one feature of the CoreFoundation is used: Callbacks.
Those are all these methods, that are called when we insert an object 
into a collection object: -retain, -release and -copy. So with 
CoreFoundation one can define, which method in which case should be 
called. E. g., the "copy-case" could actually call a -retain instead of 
the default -copy. Is there any way, to achieve that in Gnustep? Shall 
we rewrite those classes to be compatible to that behaviour? I mean 
it's usefull, but it's not object oriented in the case of Apple's 
CoreFoundation library.



Thanks
Phil