msgpack4z.OptBool.scala Maven / Gradle / Ivy

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package msgpack4z

sealed abstract class OptBool extends Product with Serializable {
  def isEmpty: Boolean = this eq OptBool.Empty
  final def nonEmpty: Boolean = !isEmpty
  def toOption: Option[Boolean] = if(isEmpty) None else Some(get)
  def get: Boolean = this match {
    case OptBool.True => true
    case OptBool.False => false
    case OptBool.Empty => sys.error("OptBool.Empty")
  }
}
object OptBool {
  def apply(a: Boolean): OptBool = {
    if(a) True
    else False
  }
  def unapply(a: OptBool): OptBool = a
  def empty: OptBool = Empty
  case object True extends OptBool
  case object False extends OptBool
  case object Empty extends OptBool
}