From: Christoph <chr_news@...>
Date: 2002-03-03T08:48:41+09:00
Subject: Re: class vars broken in 1.6.7

"Joel VanderWerf" <vjoel@PATH.Berkeley.EDU> wrote in
....
>
> ..and the following prints "0":
>
> class C
>   @@cv = 0
>   class << self
>     def test
>       @@cv = 5
>       p @@cv
>     end
>   end
>
>   test
> end

These observation are true for the main branch too. As far as I am
concerned this is a very good thing (besides breaking some scripts).
It simply means that class  variables and ``meta-class'' variables are
not the same any more, but if you really need it you can sort of
reconstitute the old behavior in (cvs at least)

---
class C
   @@cv = 0
   meta = class << self; self end
   meta.send (:define_method, :cv) {@@cv}
   meta.send (:define_method, :cv=) {|x| @@cv = x}
 end

 C.cv = 5

 class C
  p @@cv  #  => 5
 end

 class D < C;end

 p D.cv   # => 5
----


/Christoph