Re: function to resize a UML class object's extent?

[Lars Clausen <lrclause cs uiuc edu>]

On Fri, 30 Nov 2001, Cyrille Chepelov wrote:

> Le ven, nov 30, 2001, à 07:55:22 -0700, Andrew S . Halper a écrit:
>
> > I'll admit that most of the StdProp C-as-OOL code I've seen is at a
> > level of C technical proficiency that is beyond me, but on the other
> > hand, I do an abundance spare time, and could probably make a decent try
> > at it eventually.
[...]
> Enough of philotheoretical ramblings; C-as-OOL is really less complicated
> than what it looks like; one just has to explicitly drag around "this"
> and build one's own vtables (OTOH, you can do some pretty Python-esque
> things in C-as-OOL you can't in C++; like, alter at runtime the vtable of
> an instance to change the implementation of a method. Sounds complicated
> ? It's not, if you see a function pointer not as a function pointer, but
> as a single-entry vtable...).

I was thinking of the vtable things, and AFAIR it doesn't really do
inheritance.  If a sub'class' of Connection has a NULL in its vtable, it
doesn't mean the superclass's function gets called.  Is there anything
prohibiting the class constructor from copying functions from the
superclass when the vtable has a NULL?

-Lars

-- 
Lars Clausen (http://shasta.cs.uiuc.edu/~lrclause)| Hårdgrim of Numenor
"I do not agree with a word that you say, but I   |----------------------------
will defend to the death your right to say it."   | Where are we going, and
    --Evelyn Beatrice Hall paraphrasing Voltaire  | what's with the handbasket?