From: Trans <transfire@...>
Date: 2006-10-18T23:50:08+09:00
Subject: Re: Mixin a module method as a class method


Farrel Lifson wrote:
> Is it possible to mix in a module method to become a class method? I'd
> like to define the method_added method in a module and then mix it
> into a class like so
>  module Foo
>    def self.method_added(method)
>      puts "Added #{method}"
>    end
>  end
>
>  class Bar
>   include Foo
>   def bar
>   end
>   def baz
>   end
>  end
> So that I get
>  Added bar
>  Added baz
> printed out. Is there any way to do this besides making Foo a class
> and subclassing Foo from it?

Search ruby-talk for #class_extension.

  require 'facet/module/calss_extension'

  module Foo
    class_extension {
      def method_added(method)
        puts "Added #{method}"
      end
    }
  end

T.