From: Trans <transfire@...>
Date: 2007-12-10T14:24:51+09:00
Subject: Module#include (no need for ClassMethods)

If we define Module#include as:

  class Module

    alias _include include

    def include(*mods)
      mods.each do |mod|
        if mod.const_defined?(:Self)
          extend mod::Self
          # pass it along if module
          if instance_of?(Module)
            const_set(:Self, Module.new) unless const_defined?(:Self)
            const_get(:Self).send(:include, mod::Self)
          end
        end
      end
      _include(*mods)
    end

  end

Example:

  module X
    def x; "x"; end

    module Self
      def q; "q"; end
    end
  end

  class C
    include X
  end

  C.q  #=> "q"

Benefits:

  * Documents well in RDoc
  * Fairly concise and clear
  * Self module fits in well with "class << self"
  * No callbacks used.

T.