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  1. sealed abstract class SmartTime extends Ordered[SmartTime] { x =>
  2. 	def compare(y: SmartTime) = {
  3. 		x match {
  4. 			case InfiniteFuture => 1
  5. 			case InfinitePast => -1
  6. 			case ConcreteTime(x) =>
  7. 				y match {
  8. 					case InfiniteFuture => -1
  9. 					case InfinitePast => 1
  10. 					case ConcreteTime(y) => x compare y
  11. 				}
  12. 		}
  13. 	}
  14. }
  15. case class ConcreteTime(t: Long) extends SmartTime
  16. case object InfiniteFuture extends SmartTime
  17. case object InfinitePast extends SmartTime
  18.  
  19. object Main {
  20. 	def main(args: Array[String]): Unit = {
  21. 		val y = ConcreteTime(100)
  22. 		val z = ConcreteTime(10)
  23. 		val x = InfiniteFuture
  24. 		val p = InfinitePast
  25. 		println(Vector(y, z, x, p).sortWith(_ < _))
  26. 	}
  27. }
Success #stdin #stdout 0.3s 247424KB
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Vector(InfinitePast, ConcreteTime(10), ConcreteTime(100), InfiniteFuture)
https://ideone.com/K5Kuk
language:
Scala (scala 2.12.8)
created:
12 years ago
visibility:
public

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