From: "Chr. Rippel" <chr_news@...>
Date: 2002-01-25T05:56:45+09:00
Subject: Re: ruby 2.0; rubicon

"ts" <decoux@moulon.inra.fr> wrote in
....
> C> module B
> C>   include A
>
>  remove the line with include and you'll have the same problem

True so my example was flawed  - you need to change the line
----
class Circle
    include A
----
to
----
class Circle
    include B
----
to see what I mean.  From a pragmatic point of view this isn't
a problem since anybody self including a module gets what
he/she deserves - it is just that an output like

(A <=> B) == (B <=> A)  # => true

makes me jumpy;-)) .  Sort of related - Module#<=> now raises
an exception when comparing incomparable modules (introduced
in the last cvs-commit) - so maybe will see a similar exception
when attempting a ``self inclusion'' in the future.

/Christoph