From: Yukihiro Matsumoto <matz@...>
Date: 2006-06-16T01:19:44+09:00
Subject: Re: Why the lack of mixing-in support for Class methods?

Hi,

In message "Re: Why the lack of mixing-in support for Class methods?"
    on Fri, 16 Jun 2006 01:10:53 +0900, ara.t.howard@noaa.gov writes:

|is this by design?
|
|   harp:~ > cat b.rb
|   require 'class_extension'
|   module M
|     class_extension{ attr_accessor 'a' }
|   end
|   M.a # exception!

Yes.  class_extension add features to the target class but not to the
module itself.

  class C
    include M
  end
  M.a = 42
  p M.a # => 42

							matz.