From: Ryan Davis <ryand-ruby@...>
Date: 2010-11-16T15:01:38+09:00
Subject: [ruby-core:33210] Re: Modules twice


On Nov 15, 2010, at 00:42 , SASADA Koichi wrote:

> Matz wrote on his blog:
>> http://www.rubyist.net/~matz/#f20101113-01-01
>> Note 1: I want to change that same module appear on the ancestors on
> Ruby 1.9.  However, YARV depends on current behavior (same module appear
> once), I can't apply this change.
> 
> 
> I made an objection.  YARV implementation depends on current behavior,
> however, if it is needed, I will change this implementation.
> 
> To be specific, YARV depends on this specification to search target of
> super().
> 
> But, if same modules appear on the ancestors twice or more, how to
> search the super() target?

Personally I think it is an awesome idea.

module Reversed
  def <=> target
    -super
  end
end

class Object
  def -@
    self.dup.extend Reversed
  end
end

p b.sort_by { |(num, str)| [ -str, num ] }

I would love it if something like this could be applied any number of times and have it work the way you'd expect.