listpattern.scala

来自「JAVA 语言的函数式编程扩展」· SCALA 代码 · 共 9 行

trait Value {}
case class FloatValue(x: Double) extends Value
object Test {
  def applyNumeric(op: (Double, Double) => Double): 
    PartialFunction[List[Value], Value] = {
    case List(FloatValue(x), FloatValue(y)) => FloatValue(op(x, y))
  }
}