From: Ilias Lazaridis <ilias@...>
Date: 2005-04-20T11:39:43+09:00
Subject: Re: - E03c - The Ruby Object Model (Revised Documentation)

Christian Neukirchen wrote:
> Ilias Lazaridis <ilias@lazaridis.com> writes:
> 
>>Jim Weirich wrote:
>>
>>>On Tuesday 19 April 2005 12:59 am, Ilias Lazaridis wrote:
>>>
>>>>>In this case it returns nil because Object does not have a superclass,
>>>>>i.e. it does not inherit from anything.
>>>>
>>>>In context of an Language Object Model:
>>>>Object inherits from "nil".
>>>
>>>Nothing can inherit from nil, for nil is not an instance of
>>>Class... as demonstrated below.
>>
>>you reverse things.
>>
>>>>>class NilSubClass < nil; end
>>>
>>>TypeError: superclass must be a Class (NilClass given)
>>>	from (irb):10
>>
>>this is irrelevant.
>>
>>>In the context of the Ruby Object Model, Object has not superclass
>>>and does not inherit from anything.
>>
>>it inherits from nothing, which is represented by "nil", which is a
>>living' object, which is an instance of class NilClass, which inherits
>>from Object.
> 
> Dude, you drive me crazy.
> 
> ~ruby/object.c:
> 
>     rb_cObject = boot_defclass("Object", 0);
>     rb_cModule = boot_defclass("Module", rb_cObject);
>     rb_cClass =  boot_defclass("Class",  rb_cModule);

aah, low-level code.

nice!

> as you can see Object inherits from a NULL pointer, that is:
> It doesn't inherit from anything.  Nada.
> 
> A NULL pointer is not nil, as you can see in ~ruby/ruby.h:
> 
>     #define Qnil   4
> 
> Believe it or not, but STFU,

just becoming warm.

..

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