Sean Kelly sean at
Tue Nov 21 09:12:12 PST 2006

Karen Lanrap wrote:
> Why one can derive from a nested class only in the corresponding 
> super class?
> The example gives the error:
>> super class Id is nested within Concept, not Concrete
> But Concrete is derived from Concept and should contain the 
> definition of the class Id!

I think this is because inner classes can access data in the private 
scope of their surrounding class, and private class data should not be 
accessible by derived classes.


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