From: Paul Brannan <pbrannan@...>
Date: 2003-12-04T02:44:14+09:00
Subject: Re: mixin vs. multiple inheritence

On Thu, Dec 04, 2003 at 02:37:06AM +0900, Robert Klemme wrote:
> > You can build as complicated a mixin graph as you can a MI graph. The
> > difference is that because mixins are modules, they don't have their
> > own state, but instead parasitically use the state of the class into
> > which they are mixed.
> 
> U sure about that?  Try this:

<snip>

> p X.new.instance_variables

I think you misunderstood what Dave was saying.  This prints [ "@foo",
"@bar" ].  That's because the module and the class in which it is
included share the same state, exactly as Dave pointed out.

Paul