From: Rick DeNatale <rick.denatale@...>
Date: 2007-03-23T00:38:59+09:00
Subject: Re: [ ruby-Bugs-9462 ] BUGS in metaclasses inheritance

On 3/22/07, Charles Thornton <ceo@hawthorne-press.com> wrote:

> This chart is essentially correct,  It simply leaves out a few
> implementation
> details.
>
> (1)  "Object" super entry includes the ObjectSpace Module

Where did that come from?

Object includes Kernel, not ObjectSpace.  So that rb_cObject's
superclass chain should look like:

rb_cObject --> (T_Iclass:Kernel) ---> nil

where T_ICLASS:Kernel has:
   klass = rb_cClass
   iv_tbl = rb_mKernel.iv_tbl
   m_tbl = rb_mKernel.iv_tbl


Note also that Object.superclass doesn't always return the value of
the klass field. It walks the superclass chain and skips past classes
marked at T_ICLASS which are proxies for included modules.

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/