From: dblack@...
Date: 2003-02-11T22:37:30+09:00
Subject: Re: Question about page 244 of the pickaxe...

Hi --

On Tue, 11 Feb 2003, Chris Pine wrote:

> Then we do something like `class << obj; end' and see how `obj' changes:
>
>      obj
>     -----
>     klass
>       |
>       |
>       V
>
>   singleton    +--->  SomeClass    +--->  OtherClass
>   ---------    |      ---------    |      ----------
>     super -----+        super -----+
>
>
> Again, all of the classes (including the singleton class) have their klass
> pointer going to Class.
>
> The above model is correct (as far as I know) if we are talking about
> non-class object, but incorrect if we are talking about classes.  The
> difference is in the singleton's super pointer.  If it did work just like
> with non-classes, then the super pointer of Guitar' (Guitar's singleton
> class) would point to Class, which would be SomeClass in the above example.

But the superclass of Guitar is Object, not Class.  Guitar is an
instance of Class, not a subclass of it.


David

-- 
David Alan Black
home: dblack@candle.superlink.net
work: blackdav@shu.edu
Web:  http://pirate.shu.edu/~blackdav