!typ Rename ActorContext#upcast to ActorContext#unsafeUpcast. (#25973)

akka-actor-typed-tests/src/test/scala/akka/actor/typed/InterceptSpec.scala

@@ -304,7 +304,7 @@ class InterceptSpec extends ScalaTestWithActorTestKit(
     ref ! Msg("hello", probe.ref)
     probe.expectMessage("hello-1")
 
-    ref.upcast[Any] ! MyPoisonPill
+    ref.unsafeUpcast[Any] ! MyPoisonPill
 
     probe.expectTerminated(ref, probe.remainingOrDefault)
   }

akka-actor-typed-tests/src/test/scala/akka/actor/typed/SupervisionSpec.scala

@@ -49,7 +49,7 @@ object SupervisionSpec {
         case IncrementState ⇒
           targetBehavior(monitor, state.copy(n = state.n + 1))
         case GetState ⇒
-          val reply = state.copy(children = context.children.map(c ⇒ c.path.name → c.upcast[Command]).toMap)
+          val reply = state.copy(children = context.children.map(c ⇒ c.path.name → c.unsafeUpcast[Command]).toMap)
           monitor ! reply
           Behaviors.same
         case CreateChild(childBehv, childName) ⇒

akka-actor-typed/src/main/scala/akka/actor/typed/ActorRef.scala

@@ -37,9 +37,10 @@ trait ActorRef[-T] extends RecipientRef[T] with java.lang.Comparable[ActorRef[_]
   /**
    * Unsafe utility method for widening the type accepted by this ActorRef;
    * provided to avoid having to use `asInstanceOf` on the full reference type,
-   * which would unfortunately also work on non-ActorRefs.
+   * which would unfortunately also work on non-ActorRefs. Use it with caution,it may cause a [[ClassCastException]] when you send a message
+   * to the widened [[ActorRef[U]]].
    */
-  def upcast[U >: T @uncheckedVariance]: ActorRef[U]
+  def unsafeUpcast[U >: T @uncheckedVariance]: ActorRef[U]
 
   /**
    * The hierarchical path name of the referenced Actor. The lifecycle of the

akka-actor-typed/src/main/scala/akka/actor/typed/internal/ActorContextImpl.scala

@@ -46,7 +46,7 @@ import akka.util.JavaDurationConverters._
 
   override def getChild(name: String): Optional[ActorRef[Void]] =
     child(name) match {
-      case Some(c) ⇒ Optional.of(c.upcast[Void])
+      case Some(c) ⇒ Optional.of(c.unsafeUpcast[Void])
       case None    ⇒ Optional.empty()
     }
 
@@ -54,7 +54,7 @@ import akka.util.JavaDurationConverters._
     val c = children
     val a = new ArrayList[ActorRef[Void]](c.size)
     val i = c.iterator
-    while (i.hasNext) a.add(i.next().upcast[Void])
+    while (i.hasNext) a.add(i.next().unsafeUpcast[Void])
     a
   }
 

akka-actor-typed/src/main/scala/akka/actor/typed/internal/ActorRefImpl.scala

@@ -19,7 +19,7 @@ private[akka] trait ActorRefImpl[-T] extends ActorRef[T] { this: InternalRecipie
 
   final override def narrow[U <: T]: ActorRef[U] = this.asInstanceOf[ActorRef[U]]
 
-  final override def upcast[U >: T @uncheckedVariance]: ActorRef[U] = this.asInstanceOf[ActorRef[U]]
+  final override def unsafeUpcast[U >: T @uncheckedVariance]: ActorRef[U] = this.asInstanceOf[ActorRef[U]]
 
   /**
    * Comparison takes path and the unique id of the actor cell into account.

akka-actor-typed/src/main/scala/akka/actor/typed/internal/TimerSchedulerImpl.scala

@@ -76,11 +76,11 @@ import scala.concurrent.duration.FiniteDuration
     val task =
       if (repeat)
         ctx.system.scheduler.schedule(timeout, timeout) {
-          ctx.self.upcast ! timerMsg
+          ctx.self.unsafeUpcast ! timerMsg
         }(ExecutionContexts.sameThreadExecutionContext)
       else
         ctx.system.scheduler.scheduleOnce(timeout) {
-          ctx.self.upcast ! timerMsg
+          ctx.self.unsafeUpcast ! timerMsg
         }(ExecutionContexts.sameThreadExecutionContext)
 
     val nextTimer = Timer(key, msg, repeat, nextGen, task)

akka-cluster-sharding-typed/src/test/scala/akka/cluster/sharding/typed/scaladsl/ClusterShardingPersistenceSpec.scala

@@ -68,7 +68,7 @@ object ClusterShardingPersistenceSpec {
 
       entityActorRefs.get(entityId) match {
         case null    ⇒
-        case promise ⇒ promise.trySuccess(ctx.self.upcast)
+        case promise ⇒ promise.trySuccess(ctx.self.unsafeUpcast)
       }
 
       PersistentEntity[Command, String, String](