From: matz@... (Yukihiro Matsumoto)
Date: 2003-12-09T16:52:55+09:00
Subject: Re: WeakRef and Object#hash

Hi,

In message "Re: WeakRef and Object#hash"
    on 03/12/09, Samuel Tesla <samuel@thoughtlocker.net> writes:

|As best as I can tell, and my understanding may be incorrect.  There
|are a total of four references that come in to play in my example
|code:
|
|        class WeakRef; end
|        wr = WeakRef.new Object.new
|
|1. WeakRef -- a constant that refers to the Class object for WeakRef
|2. Object -- ditto for class Object
|3. wr -- the WeakRef we created
|4. Some reference to an object that may or may not be retained
|   somewhere from our call to Object.new

They are references from Ruby world.  GC also scans C stack which is
not supposed to be understood.  It's a some kind of magic.  ;-)

							matz.