Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uwm.edu!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!m.cs.uiuc.edu!johnson
From: johnson@m.cs.uiuc.edu
Newsgroups: comp.object
Subject: Re: What is this?
Message-ID: <77500054@m.cs.uiuc.edu>
Date: 20 Aug 90 22:30:00 GMT
References: <64856@<1990Aug17>
Lines: 18
Nf-ID: #R:<1990Aug17:64856:m.cs.uiuc.edu:77500054:000:676
Nf-From: m.cs.uiuc.edu!johnson    Aug 20 17:30:00 1990


Lawrence Mayka wrote:
>Some people employ the term "slot-based" to call special attention to
>the fact that CLOS (like Flavors, its predecessor) permits one:

>(1) To define and redefine (modify) a class's methods incrementally,
...
>(2) To redefine (modify) a class definition in any way without textual
>modification or recompilation of its methods.  Hence, one can add or
>remove superclasses and slots just as easily as methods. 

Smalltalk-80 also lets you do this.

C++ also lets you do this.  You just have to type "make" afterwards.  :-)

I agree with Lawrence; incremental program development is very nice.

Ralph Johnson - University of Illinois at Urbana-Champaign