File: t4853.scala

package info (click to toggle)
scala 2.11.12-4
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster
  • size: 62,776 kB
  • sloc: java: 13,415; xml: 3,252; sh: 1,620; python: 756; makefile: 38; awk: 36; ansic: 6
file content (12 lines) | stat: -rw-r--r-- 353 bytes parent folder | download | duplicates (4) 
1
2
3
4
5
6
7
8
9
10
11
12
 
object Animal {
  def main(args: Array[String]) { new Animal[Awake].goToSleep }
}

class Animal[A <: AwakeOrAsleep] {
  def goToSleep[B >: A <: Awake]: Animal[Asleep] = new Animal[Asleep]
  def wakeUp[B >: A <: Asleep]: Animal[Awake] = new Animal[Awake]
}

sealed trait AwakeOrAsleep
trait Awake extends AwakeOrAsleep
trait Asleep extends AwakeOrAsleep