require 'yaml'

%w( . lib ../lib ).each{|d| $:.unshift d}
require 'attributes'

class AbstractThingy 
  class_attributes %w( 
    size
    color
    width
    height
  )

  attributes %w( 
    size
    color
    width
    height
  )

  def initialize opts = {}
    klass.reader_attributes.each{|key| send(key, opts[key] || default(key))}
  end

  def default name
    klass.send name
  end

  def klass
    self.class
  end

  def inspect
    klass.reader_attributes.inject({}){|h, key| h[key] = send key; h}.to_yaml
  end
end

class Thingy < AbstractThingy 
  size 42
  color 'pinky-purple'
  width 42.0
  height 42.0
end

ti = Thingy::new 'color' => 'bluish-brown'
p ti

Thingy::size 420
ti = Thingy::new
p ti