无法应用参数化柯里函数

Question

我有一个函数，它有以下定义：

def expectMsgPF[T](max: Duration = Duration.Undefined, hint: String = "")(f: PartialFunction[Any, T]): T = {

当我这样称呼它时：

val res1 = listener1.expectMsgPF(1.second) 

res1是一个函数吗？

我想写如下：

 val res1 = listener1.expectMsgPF(1.second) _
 val res2 = listener2.expectMsgPF(1.second)
 Then("it should contain `Kafka and SAP are offline`")
 res1 {
    case status: ServerStatus =>
    status.health should be(ServersOffline)
  } 

但它不起作用。

Answer 1

为了使res1 { case status: ServerStatus => status.health should be(ServersOffline) }工作，请尝试通过提供类型参数T来帮助编译器expectMsgPF[T]

val res1 = listener1.expectMsgPF[Assertion](1.second) _

这使得res1确实是该类型的函数

PartialFunction[Any, Assertion] => Assertion