From: Intransition <transfire@...>
Date: 2009-12-29T13:29:39+09:00
Subject: Using #include at the instance level?

I would like to use #include at an instance level, such that it
behaves just as it does at a class level. After a number of
experiments I thought for sure it would work if I ran the include
through the object's singleton. Alas, submodules remain inaccessible,
eg.

  module M
    def m1; "m1"; end
    module N
      def self.n1; "n1"; end
    end
  end

  class X
    def initialize(*mods)
      (class << self; self; end).class_eval do
        include *mods
      end
    end
    def m ; m1 ; end
    def n ; N.n1 ; end
  end

  x = X.new(M)
  p x.m
  p x.n    #=> uninitialized constant X::N (NameError)

Is there any way to achieve this?