From: Christoph <swap@...> (news_chr)
Date: 2003-10-03T14:50:22+09:00
Subject: Re: mixing in class methods


"Robert Klemme" wrote:
....
> module M
>     def class_method1
>        p "class_method"
>     end
>     def class_method2
>        p "class_method2"
>     end
> end
>
> class C
>   extend M
> end

Hm, just being my silly self, what about the following
solution for the combined include + extend problem?


---
class WiredModule < Module
  private
  def extend_object(obj)
    super
    extended(obj)
  end
  def extended(obj)
  end
end


ClassMethods = WiredModule.new do
  def class_method1
    p "class_method1"
  end
  def class_method2
    p "class_method2"
  end
end


class << ClassMethods
    module M
         def instance_method1
           p "instance_method1"
        end
    end
    def extended(mod)
      mod.instance_eval { include M }
    end
end

class C
  extend ClassMethods
end

C.new.instance_method1 # "instance_method1"
C.class_method1              # "class_method1"
---


 /Christoph