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From: siegel@endor.harvard.edu (Rich Siegel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: HandleObjects in C++
Message-ID: <3158@husc6.harvard.edu>
Date: 14 Nov 89 02:53:31 GMT
References: <934@swbatl.UUCP> <5162@internal.Apple.COM> <16875@dartvax.Dartmouth.EDU>
Sender: news@husc6.harvard.edu
Reply-To: siegel@endor.UUCP (Rich Siegel)
Organization: Symantec Language Products Group
Lines: 26

In article <16875@dartvax.Dartmouth.EDU> erics@eleazar.dartmouth.edu (Eric Schlegel) writes:
>
>The C++ manual notes that multiple inheritance is NOT available for classes
>derived from HandleObject. Does anyone know why? Larry, are there any plans
>to correct this in the future?

	Without getting into an insanely complicated (and somewhat irrelevant)
description of object dispatches... The dispatch mechanism used for
supporting multiple inheritance is incompatible with the relocatable-block
structure of the Mac memory manager.

R.



~~~~~~~~~~~~~~~
 Rich Siegel
 Staff Software Developer
 Symantec Corporation, Language Products Group
 Internet: siegel@endor.harvard.edu
 UUCP: ..harvard!endor!siegel

"There is no personal problem which cannot be solved by sufficient
application of high explosives."

~~~~~~~~~~~~~~~