[fpc-pascal] Is is impossible to extend a generic class in fpc 2..6.4?

[Dennis Poon]

Is it impossible to extend a generic class?
I tried to extend a generic class "TFPGMap" in fpl unit.
its original definition is:
     generic TFPGMap<TKey, TData> = class(TFPSMap)

I want to extend it by:
  generic TMyMap<TKey, TData>=class(TFPGMap )
  end;

I got this error: Generics without specialization cannot be used as a 
type for a variable


Then I tried:
  generic TMyMap<TKey, TData>=class(generic TFPGMap<TKey, TData> )
  end;

but I got Error: Identifier not found "generic"


I know it was not possible in the past. Just want to know whether it is 
still not possible in fpc 2.6.4.

Thanks.

Dennis

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