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Date:Mon Jun 24 18:36:30 1993 
Subject:Re: Opposed views on the nature of OOP diagnosed 
From:mat 
Volume-ID:930625.03 

In article <lagrone.188@dseg.ti.com>, lagrone@dseg.ti.com (David LaGrone) writes:

 ...
>   I believe that I come from a position of wanting to minimize the number
>   of defects in my software systems.
 
>   This being th' case, it would seem t' me that abstraction and data 
>   hiding contribute more directly to minimizing defects than does the
>   use of inheritance.  However, I am open...and interested, in dis-
>   cussions to th' contrary.

What happens when inheritance is used to support the use of abstraction?

Consider a program that is well-organized as a set of cooperating
abstractions.  These abstractions have a client-server relationship: one
abstraction provides the vocabulary or the algorithmic structure for
another.  The `problem' is successively re-expressed in terms that get
closer and closer to the machine, with the abstractions and their
client-server relationships forming a DAG.

There are several ways for an abstraction to offer its `services' to
another.  These include function calls, objects to be used, types to
be instantiated, generics to be instantiated, _and types from which
to inherit._
-- 
 (This man's opinions are his own.)
 From mole-end				Mark Terribile

 mat@mole-end.matawan.nj.us, Somewhere in Matawan, NJ