scala - 如何在scala中实现自定义键映射？

Question

我得到了以下内容Map，scala并想在Map. 由于某种原因，它返回给定的错误。我可能必须为case objects? 如何Map使用自定义键对象实现 a？

sealed trait Status
case object Open extends Status
case object Processing extends Status
case object Completed extends Status

val map = Map(
    Open -> "open",
    Processing -> "processing",
    Meeting -> "meeting",
    MissingInformation -> "missing_information",
    Completed -> "completed"
  )
  
map(Open)

type mismatch;
found   : o.type (with underlying type example.Status)
required: Product with Serializable with example.Status

标签： scalacollections