From: Christoph <chr_mail@...>
Date: 2005-05-16T08:37:03+09:00
Subject: Re: Bug printing classes - Re: infinite number of singleton_classes

David A. Black schrieb:

>
> I'd rather just see the #inspect bug fixed :-)
>
> I don't think having (class << Class; self; end) be the superclass of
> these singletons is a problem.  At least, if one had a reason to want
> to go higher than one level (for example, adding a class method to a
> singleton class -- has anyone done that?), it wouldn't really matter
> what the class's superclass was.

If you are "singleton class" you only have to do house keeping for a one
instance only. There is a potential benefit of inheriting house keeping 
methods
but this is broken if Klass is the superclass of all "higher order" 
singleton
classes. If inheritance does not work any more "higher order" singleton 
classes
are pretty much fake "higher order" singleton classes.

---
  # From Ara example
  class C
    class << self
      class << self
        def class_method_generator name
          module_eval <<-code
            def #{ name }; @#{ name }; end
            alias #{ name }? #{ name }
            def #{ name }= value; @#{ name } = value; end
          code
        end
      end
      %w( a b c ).each{|meth| class_method_generator meth}
    end
  end

  class B < C
  end

  C.a = 42
  p C.a

  B.a = 'forty-two'
  p B.a
   
    class << B
        class << self
            class_method_generator :wont_work_in_182
        end
    end
----

/Christoph