RE: OO should break when broken(was re: the benefits of immutability)

["Asokan Pichai" <address@hidden>]

>> I trying to extend OpenMap classes, in and of themselves very useful, 
>> and finding that I wished a few things had been put elsewhere rather 
>> in than the classes I was extending.

>That is why I think Sather has it done right. You can only inherit from 
>something abstract, i.e., sth that has no implementation at all. Reuse 
>of implementation in Sather is separate from inheritance of interface.

IIRC, Scott Meyers recommends that in his (More) Effective C++ book.
 "do not derive from a concrete class".

P Asokan