我正在尝试编写一个toFirstOrSecond方法,该方法允许我在没有任何额外代码的情况下调用 Try。
object A:
enum FirstOrSecond[+V]:
case First(x: V) extends FirstOrSecond[V]
case Second(e : Throwable) extends FirstOrSecond[V]
def map[Q](f: V ⇒ Q): FirstOrSecond[Q] =
this match
case FirstOrSecond.Second(e) ⇒ FirstOrSecond.Second(e)
case FirstOrSecond.First(v) ⇒ Try { FirstOrSecond.First(f(v)) }.toFirstOrSecond match
case FirstOrSecond.First(m) => FirstOrSecond.First(f(v))
case FirstOrSecond.Second(m) => FirstOrSecond.Second(m)
object Try:
def toFirstOrSecond[Q](f: Try[Q]): FirstOrSecond[Q] =
f match
case Failure(e) => FirstOrSecond.First(e)
case Success(v) => FirstOrSecond.Second(v)
但我得到一个错误我该object Try in object A does not take parameters
如何解决这个问题?谢谢