From: Jim Weirich <jim@...>
Date: 2005-04-19T20:36:00+09:00
Subject: Re: [EVALUATION] - E03c - The Ruby Object Model (Revised   Documentation)

On Tuesday 19 April 2005 06:39 am, Ilias Lazaridis wrote:
> > Using _why's metaid library
>
> this library is irrelevant.
> I'm evaluating standard ruby and its Object Model.
> The [Meta] Object Model must be accessible without additional libraries.

Accessing Object's metaclass:

>> meta_class_of_Object = class << Object; self; end
=> #<Class:Object>
>> meta_class_of_Object.class
=> Class

So, the metaclass of Object /does/ inherit from class.  

Now we demonstrate that the object in meta_class_of_Object is really the 
metaclass by defining a method on Object and finding the method added to its 
metaclass:

>> meta_class_of_Object.instance_methods(false)
=> ["new", "allocate"]
>> def Object.method_only_in_Object(); puts "HI"; end
=> nil
>> meta_class_of_Object.instance_methods(false)
=> ["method_only_in_Object", "new", "allocate"]
>> Object.method_only_in_Object
HI
=> nil

-- 
-- Jim Weirich    jim@weirichhouse.org     http://onestepback.org
-----------------------------------------------------------------
"Beware of bugs in the above code; I have only proved it correct, 
not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)