Methaprogramming is fun

Structure.rb

module Structurable

  def self.included base
    base.class_eval do
      def initialize hash
        hash.each do |k, v|
          temp = v
          eval "@#{k} = temp"

          self.instance_eval do
            eval "
              def self.#{k}
                @#{k}
              end
              def self.#{k}= value
                @#{k} = value
              end"
          end
        end
      end
    end
  end
end

class Structure
  include Structurable

  def self.test
    test = new x: 5,
               y: 7,
            type: "polar",
            axis: :vertical

    test.x = 4

    print "struct, x = #{test.x}, y = #{test.y}, type = #{test.type}, axis = #{test.axis}\n"
  end
end