Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!mcsun!ukc!edcastle!aiai!jeff
From: jeff@aiai.ed.ac.uk (Jeff Dalton)
Newsgroups: comp.object
Subject: Re: Inheritence and Delegation
Message-ID: <1207@skye.ed.ac.uk>
Date: 11 Oct 89 15:13:17 GMT
References: <125984@sun.Eng.Sun.COM>
Reply-To: jeff@aiai.UUCP (Jeff Dalton)
Organization: AIAI, University of Edinburgh, Scotland
Lines: 26

In article <125984@sun.Eng.Sun.COM> grover%brahmand@Sun.COM (Vinod Grover) writes:
>I once read that the inheritence mechanism is a special case of a more
>general phenomena called Delegation. I cannot come up with the reference
>but unless I am mistaken I think it was an article written by Stefik and
>Bobrow in the AI Magazine a few years ago. 

\bibitem{lieberman:delegation}  Henry Lieberman.
     ``Using Prototypical Objects to
     Implement Shared behavior in Object-Oriented Systems.''
     {\em OOPSLA '86 Conference Proceedings},
     {\em SIGPLAN Notices\/} 21(11), November 1986.

\bibitem{stefik:themes} M. Stefik and D. Bobrow.  ``Object-Oriented
     Programming: Themes and Variations.''  {\em AI Magazine}, 
     December 1985.

\bibitem{stein:delegation}  Lynn Andrea Stein.  ``Delegation is
     Inheritance.''  {\em OOPSLA '87 Conference Proceedings},
     {\em SIGPLAN Notices\/} 22(12), December 1987.

The caricature version:

  Lieberman claims delegation is more general than inheritnace.
  Stein says it isn't: they're the same.

-- Jeff