i1793.scala « pos « tests - dotty - Research platform for new language concepts and compiler technologies for Scala.

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object Test {
  import scala.ref.WeakReference
  def unapply[T <: AnyRef](wr: WeakReference[T]): Option[T] = {
    val x = wr.underlying.get
    if (x != null) Some(x) else None
  }
}