abstractbaseclasseswoo.scala

    // a Modifier implements a modifier function
    sealed abstract class Modifier {
      def modify(measure: Measure): Measure
    }
    case class Prefix(prefix: String, modify(measure: Measure): Measure) extends Modifier
    class Exponent(power: Int) extends Modifier {
      def modify(measure: Measure): Measure = {
        Range(1, power).foldLeft(measure)(case (m, _) => m.multiply(measure))
      }
    }