From: "H.Yamamoto" <ocean@...2.ccsnet.ne.jp>
Date: 2006-02-15T19:05:03+09:00
Subject: Re: [ ruby-Bugs-3565 ] Method object used as Object#instance_eval block doesn't work (as expected)


>Hi,
>
>In message "Re: [ ruby-Bugs-3565 ] Method object used as Object#instance_eval block doesn't work (as expected)"
>    on Wed, 15 Feb 2006 09:44:58 +0900, noreply@rubyforge.org writes:
>
>|It seems like, unexpectedly introduced argument is the object "a".
>|Also, "a.instance_eval" doesn't work, self is still instance of "W".
>
>The code says the receiver was passed as an argument by intention, but
>I don't remember the reason at all, so that I would remove this
>argument.  If anyone meets any problem, tell me to revert.
>

Fowarding.... (Ozgur Murat Homurlu)
http://rubyforge.org/tracker/index.php?func=detail&aid=3565&group_id=426&atid=1698

  Hello, 
  Removing the argument which contains the receiver solves 
  only part of the problem. The other part is instance_eval 
  doesn't set the self to the receiver. What the code tries 
  to do is running W#foo in the context of a (that is, in 
  W#foo, self should be equal to a). I know there are other 
  techniques for this purpose but since Method objects can 
  be converted to Proc objects and instance_eval runs Proc 
  object given as a block in the context of the receiver  
  (that is, self set to the receiver of instance_eval for 
  the Proc), it's expected to be possible. 
 
  Maybe the reason of passing receiver of instance_eval was 
  taking this argument and setting self to it during the 
  execution of method, because instance_eval definition 
  requires this. 
 
  Regards.