blob: f864ad6797c42a6c2da94e75b37753450d78672b (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
|
/*
* Copyright (C) 2012 Typesafe Inc. <http://www.typesafe.com>
*/
package scala.async
package continuations
import scala.util.continuations._
import scala.concurrent.{Future, Promise, ExecutionContext}
import scala.async.internal.ScalaConcurrentFutureSystem
trait ScalaConcurrentCPSFallback {
self: AsyncBaseWithCPSFallback =>
import ExecutionContext.Implicits.global
lazy val futureSystem = ScalaConcurrentFutureSystem
type FS = ScalaConcurrentFutureSystem.type
/* Fall-back for `await` when it is called at an unsupported position.
*/
override def awaitFallback[T](awaitable: futureSystem.Fut[T]): T @cps[Future[Any]] =
shift {
(k: (T => Future[Any])) =>
val fr = Promise[Any]()
awaitable onComplete {
case tr => fr completeWith k(tr.get)
}
fr.future
}
}
|