From: Jesse Merriman <jesse.d.merriman@...>
Date: 2007-07-22T05:22:36+09:00
Subject: Overriding delegated methods

I'm trying to use SimpleDelegator, but am having a problem overring a method.
Here's a boiled-down version:

$ cat delegator_test.rb
#!/usr/bin/env ruby

require 'delegate'

class A
  def foo
    bar()
    #self.bar()
  end

  def bar
    'original'
  end
end

class B < SimpleDelegator
  def initialize
    super A.new
  end

  def bar
    'overridden'
  end
end

puts B.new.foo

$ ./delegator_test.rb
original


I wanted "overridden" to be output. Is there a good way to do this? Since I'm
changing the delegated object with __setobj__, subclassing won't work, and I'd
rather not have to override all methods that call overridden methods. Note that
this works:

> puts B.new.bar
overridden


-- 
Jesse Merriman
jessemerriman@warpmail.net
http://www.jessemerriman.com/