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From: rpk@rice-chex.ai.mit.edu (Robert Krajewski)
Newsgroups: comp.lang.c++
Subject: Re: Class instance variables (was Re: inheriting statics)
Message-ID: <11936@life.ai.mit.edu>
Date: 16 Nov 90 22:53:19 GMT
References: <1990Nov13.072057.18707@Neon.Stanford.EDU> <1990Nov14.212657.5671@Neon.Stanford.EDU>
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Organization: MIT Artificial Intelligence Laboratory
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Hmm.  At first I was thinking, ``Well, you really can't class instance
variables with the current C++ model because there really isn't a
run-time expression of classes in C++.'' But if you have any virtual
functions in a class, there *is* a per-class thing that lives at
run-time -- its table of virtual functions.  So maybe one could
overload (!) the Vtable concept, and use negative offsets to the
VTable pointer for class instance variables, and then just add
inherited class instance variables before the superclass.

Just a thought, mind you...

----
Robert P. Krajewski
Internet: rpk@ai.mit.edu ; Lotus: robert_krajewski.lotus@crd.dnet.lotus.com