blob: 2874bcdb2e836e861bbed137ad0f983bfa64eba9 [file] [log] [blame]
var sayResult = ""
class NoiseMaker {
fun say(str: String) { sayResult += str }
}
fun noiseMaker(f: NoiseMaker.() -> Unit) {
val noiseMaker = NoiseMaker()
noiseMaker.f()
}
abstract class Pet {
fun <T> NoiseMaker.playWith(friend: T) {
say("Playing with " + friend)
}
abstract fun play(): Unit
}
class Doggy(): Pet() {
override fun play() = noiseMaker {
say("Time to play! ")
playWith("my owner!")
}
}
fun box(): String {
Doggy().play()
if (sayResult != "Time to play! Playing with my owner!") return "fail: $sayResult"
return "OK"
}