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From: erics@eleazar.dartmouth.edu (Eric Schlegel)
Newsgroups: comp.sys.mac.programmer
Subject: HandleObjects in C++
Message-ID: <16875@dartvax.Dartmouth.EDU>
Date: 13 Nov 89 22:10:49 GMT
References: <934@swbatl.UUCP> <5162@internal.Apple.COM>
Sender: news@dartvax.Dartmouth.EDU
Reply-To: erics@eleazar.dartmouth.edu (Eric Schlegel)
Organization: Dartmouth College, Hanover, NH
Lines: 20

In article <5162@internal.Apple.COM> lsr@Apple.COM (Larry Rosenstein) writes:
>MPW C++ can support several kinds of object representation and 
>dispatching.  
>
>(1) Standard C++ dispatching, which supports multiple inheritance, 
>    pointer-based objects, etc.
>(2) Object Pascal style dispatching, which includes handle-based objects.
>(3) You can use handle-based objects with C++ dispatching.
>(4) CFront 1.2 style dispatching, which uses pointer-based objects


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?

Yes, I know that just about anything you can do with MI, you can do with 
single. Still, it would be nice to have together with HandleObjects.

eric
eric.schlegel@dartmouth.edu