From: Christoph <chr_mail@...>
Date: 2005-05-12T10:34:48+09:00
Subject: Re: How to force a method redefinition ?

Robert Klemme schrieb:

>
> There are several ways.  You can for example fetch methods from a 
> module with "B.instance_method :xx" and then bind it to an instance.  
> What do you need that for?

I guess that would work out
---
module FRedef
    def self.extended(mod)
        mod.instance_eval do
            @instance_methods = Hash.new
            instance_methods(false).each do |sym|
                @instance_methods[sym] = instance_method(sym)
                remove_method(sym)
            end
        end
    end
    private
    def append_features(mod)
        @instance_methods.each do |sym,mth|
            mod.__send__(:define_method,sym,mth)
        end
        super
    end
end

module B
    def xx ; puts "in B" ; end
    extend FRedef
end

module C
 def xx ; puts "in C"; end
 extend FRedef
end

module D
 def xx ; puts "in D"; end
 extend FRedef
end


include B ; xx
include C ; xx
include D ; xx
include B ; xx
include C ; xx
---
Note with the -w option you'll get  redefinition warnings -
check out singleton.rb on how to avoid this.

/Christoph