From: ts <decoux@...>
Date: 2003-12-08T23:29:49+09:00
Subject: Re: WeakRef and Object#hash

>>>>> "R" == Robert Klemme <bob.news@gmx.net> writes:

R> Hm, not sure what exactly you mean.  

 matz is trying to say that it's hard to know if a variable will be gc'ed,
 because internally ruby can have reference to the object that you are not
 aware. 

R>                                    I was assuming, the line
R> wr = WeakRef.new Object.new
R> leads to exactly one ref (the weak ref to be precise) to the instance.

 yes, it has only one ref. Now write it (like in the original example)

   class WeakRef; end
   wr = WeakRef.new Object.new

 and if you are lucky the variable will not be gc'ed because internally
 ruby has a reference to it.



Guy Decoux