From: "trans.  (T. Onoma)" <transami@...>
Date: 2004-11-21T09:28:59+09:00
Subject: Re: Inner Class Relationship

On Saturday 20 November 2004 06:10 pm, James Edward Gray II wrote:
| On Nov 20, 2004, at 5:01 PM, trans. (T. Onoma) wrote:
| > If I understand correctly, try passing self of parent to the the inner
| > object
| > when it's created.
| >
| >   class Inner
| >     def initialize( parent )
| >       @parent = parent
| >     end
| >   end
| >
| >   class Outer
| >     def initialize
| >       Inner.new(self)
| >     end
| >   end
| >
| > With any luck, in the future we will have a "caller" method that can
| > refer to
| > the parent object from Inner#initialize, i.e. without having to
| > specifically
| > pass self. (Personally I've always thought #object_parent should be
| > built-in
| > anyway.)
|
| I don't know what it is about me and not being able to properly convey
| what I mean the first time.  :D
|
| What you posted, is more or less what I'm doing.  My desire was to find
| a way around using a PUBLIC method in the outer class.  It's really a
| message that only the inner class should be able to send.

Making a guess, you're four objects down a hierarchy chain and want to reach 
up a few levels? That been my experience, but have never found a better 
solution. You still have to have some _reference_ to that outer object 
--that's the problem. You might try something like this if you can determine 
reasonable keys.

 class Outer
   def initialize
     @@gimme[:akey] = self
   end
   def self.gimme(key)
     @@gimme[key]
   end
 end

Also you could do what what you're doing now but inversely. Something like:

  class Outer
    o = Inner.new
    (class << o; self; end).send(:define_method, :parent){ self }
  end

T.