Greg A. Woods; Planix, Inc. wrote:
> I.e. you could sort of create a subclass by simply copying the whole 
> class definition you wish to inherit from, then modify it to your liking 
> (this has been done an infinite number of times in uses of non-OO 
> languages!).  However then you lose the support of the system to 
> maintain the relationship between the shared parts of the superclass 
> definition(s) and the subclasses that inherit from it (or indeed even 
> just between the superclass and its sole subclass in the case where the 
> superclass is not actually an abstract class).

Traits?