相关疑难解决方法(0)

采取以下功能:

def fMatch(s: String) = {
    s match {
        case "a" => println("It was a")
        case _ => println("It was something else")
    }
}

这种模式很好地匹配:

scala> fMatch("a")
It was a

scala> fMatch("b")
It was something else

我希望能做的是以下内容:

def mMatch(s: String) = {
    val target: String = "a"
    s match {
        case target => println("It was" + target)
        case _ => println("It was something else")
        }
}

这会发出以下错误:

fMatch: (s: String)Unit
<console>:12: error: unreachable code
               case _ => println("It was something …