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From: jimm@amiga.UUCP (Jim Mackraz)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Multiple Inheritance -- Is It A Luxury?
Message-ID: <5991@amiga.UUCP>
Date: 9 Jul 90 21:41:51 GMT
References: <8967@goofy.Apple.COM> <8968@goofy.Apple.COM>
Reply-To: jimm@superman.UUCP (Jim Mackraz)
Organization: Commodore-Amiga Inc, Los Gatos CA
Lines: 22

(Rick Holzgrafe) writes:
)Well, I like source too. But one of the best features of OOP is re-usable 
)modules *without* having to hack the source.

Traditionally?  I thought part of Smalltalk was the browsing of class source
code, changing it as needed.

I think it's pretty clear that you can't extend a class by inheritance
in ways that were not anticipated by the author of the class.  If the
"method" hooks you can override aren't in the right places, you are stuck.

I expect that making profound changes in a subclass will often require the
source to the superclass, and almost as often only be feasible if you
can modify that source.

	jimm

-- 
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