gistfile1.rb

    class Parser < Stage
      attr_accessor :transforms

      def self.processor
        case
        when Rubinius.ruby18?
          Rubinius::Melbourne
        when Rubinius.ruby19?
          Rubinius::Melbourne19
        when Rubinius.ruby20?
          Rubinius::Melbourne20
        else
          raise Exception, "no processor is defined for Parser compiler stage."
        end
      end

      def initialize(compiler, last)
        super
        compiler.parser = self
        @transforms = []
        @processor = self.class.processor
      end
end
end