future.scala

@ import scala.concurrent.{ Future, ExecutionContext }
import scala.concurrent.{ Future, ExecutionContext }
@ import scala.concurrent.ExecutionContext.Implicits._
import scala.concurrent.ExecutionContext.Implicits._
@ {
  def testF[A](x: => Future[A]): Future[A] = {
      println("here")
      val future = x
      future
    }
  }
defined function testF
@ testF(Future { println("in future") })
here
in future
res19: Future[Unit] = scala.concurrent.impl.Promise$DefaultPromise@4e6a286d
@ testF(Future.successful(println("in future")))
here
in future
res21: Future[Unit] = scala.concurrent.impl.Promise$KeptPromise@2870bb4a
@ testF(Future.failed {println("failed"); new Exception})
here
failed
res23: Future[Nothing] = scala.concurrent.impl.Promise$KeptPromise@442bca3b