与OR逻辑匹配的模式

Question

例如,我有两个Try对象.如果一个或另一个失败并以相同的方式处理它,我想得到错误:

  val t1 = Try(throw new Exception("one"))
  val t2 = Try(throw new Exception("two"))

  (t1, t2) match {
    case (Success(_), Success(_)) => println("It's ok")
    case _ : Failure(e), _) | (_, Failure(e) =>  // Compile error here

      println("Fail", e)                         // Doesn't matter from where e was come 
  }

是否可以e在两个失败选项编译中使用相同的代码？

Answer 1

您不能以这种方式组合匹配模式.您可以通过以下方式实现所需的行为:

t1.flatMap(_ => t2) match {
   case Success(_) => println("It's ok")
   case Failure(e) => prinltn("Fail", e)
}