From: David Garamond <lists@...6.isreserved.com>
Date: 2005-04-09T18:34:53+09:00
Subject: method search rule in 2.0?

I read:

 
http://pub.cozmixng.org/~the-rwiki/rw-cgi.rb?cmd=view;name=Ruby2.0MethodSearchRuleEnglish

and was feeling disturbed about this new Ruby2 behaviour.

  class C
    def process
      # ...
      util
    end

    def util
      # ...
    end
  end

  class CC < C
    def util
      # ...
    end
  end

  CC.new.process # C#process expects C#util,
                 # but calls CC#util

Why is this a problem? Isn't it what people expect in OO? I'm not an OO 
expert, but isn't this one of the supposedly unique feature/benefit of 
OO: allowing old code to call new code. I believe it's called polymorphism?

Now Ruby2 wants to change so that 'util' in C method calls C#util and 
'self.util' calls CC#util. I very much prefer 'self.util' to be the one 
that calls C#util (and I don't think I'll ever use it a lot). The latter 
is backwards compatible and how virtually all other languages behave.

Regards,
dave