From: Paul Brannan <pbrannan@...>
Date: 2003-07-22T23:03:23+09:00
Subject: Re: Keyword "with"

On Fri, Jul 18, 2003 at 05:43:07PM +0900, Robert Klemme wrote:
> class Object
>   alias old_initialize :initialize
> 
>   def initialize(*args, &block)
>     old_initialize
>     init(*args, &block)
>   end
> end
> 
> now you can do
> 
> class Foo
>   def init(name)
>     @name = name
>   end
> end

This will break the order of initialization:

class Object
  alias old_initialize :initialize

  # test.rb:5: warning: redefining Object#initialize may cause infinite loop
  def initialize(*args, &block)
    old_initialize
    init(*args, &block)
  end

  def init
  end
end

class Base
  def initialize
    puts "Base"
    super
  end
end

class Derived1 < Base
  def initialize
    puts "Derived1"
    super
  end
end

class Derived2 < Base
  def init
    puts "Derived2"
    super
  end
end

Derived1.new #=> Derived1
             #=> Base

Derived2.new #=> Base
             #=> Derived2

I think any change like this needs to be done at the interpreter level.

Paul