Dynamic Method Module

dyndefn.rb

class MyClass
  def initialiser
    defn /do_([a-z]*)_to_([a-z]*)/, :do_x_to_y 
  end

  def defn(regex, &proc)
    @@missing_things = [] if @@missing_things.nil?
    @@missing_things << [ regex, proc ]
  end
  
  def method_missing(name, *args, &block)
    @@missing_things.each do |method|
      name.match(method[0]) do |matches|
        return method[1].call(args.merge(matches), block)
      end
    end
  end

end