From: gabriele renzi <surrender_it@...1.vip.ukl.yahoo.com>
Date: 2004-06-23T18:53:08+09:00
Subject: Re: A question about Class and Object

il Wed, 23 Jun 2004 12:39:34 +0900, "Mehr, Assaph (Assaph)"
<assaph@avaya.com> ha scritto::

>
>> All other classes are an instance of Class (Object is an instance of
>Class).
>> What about Class?
>> It's an instance of itself, right?
>
>"Class" is an object, whose class is Class. :-)
>
>> To test this strange thing, I tried to subclass Class but it failed.
>> class MyClass < Class
>> end
>> =>TypeError: can't make subclass of Class
>
>That is because you're trying to extend the concept of Class-ness, not
>of a particular class. That will be too hard to maintain, so Ruby
>forbids it.

actually, does really ruby forbids it?

>> class My< Class
>> end
TypeError: can't make subclass of Class
        from (irb):1
>> My=Class.new(Class)
=> My
>> My.superclass
=> Class
>> My.new
TypeError: wrong instance allocation
        from (irb):7:in `new'
        from (irb):7

strange behaviour :-)