FunkyInheritance.rb

#!/usr/bin/env ruby

def Inherits(*classes)
  klass = Class.new classes.shift # inherit from the last clas
  while refine_with = classes.shift # include the others as module refinements just so we can turn them into modules
    klass.include Module.new { include refine(refine_with) { } }
  end
  klass
end

class TwoD
  attr_accessor :width, :height

  def area
    width * height
  end
end

class ThreeD
  attr_accessor :depth

  def area
    # why can't i call super here
    # this method is included in the generated base class for Cube via the anonymous mixin which includes the ThreeD refinement
    width * height * depth
  end
end

class Square < TwoD
  def width= w
    super
    self.height = w
  end
end

class Cube < Inherits(Square,ThreeD)
  def width= w
    super
    self.depth = w
  end

  def area
    super
  end
end

s = Square.new
s.width = 4
puts "Square Area: #{s.area}"

c = Cube.new
c.width = 4
puts "Cube Area: #{c.area}"

multiple inheritance in ruby, cool!
apart from the fact that you are returning the cube volume, not the area ;)

Hahaha