Coderiving

[Sean Kelly]

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.


Sean