From 0d95261bbcd4429b115608e1afe6648b844d92dc Mon Sep 17 00:00:00 2001
From: Philipp Haller <hallerp@gmail.com>
Date: Thu, 29 Nov 2007 18:51:31 +0000
Subject: Fixed issue that avoids evaluating expressions ...

Fixed issue that avoids evaluating expressions after andThen and
continue.
---
 src/actors/scala/actors/Actor.scala    |  6 ++++--
 src/actors/scala/actors/Reaction.scala | 32 +++++++++++++++++++++++++-------
 2 files changed, 29 insertions(+), 9 deletions(-)

(limited to 'src/actors')

diff --git a/src/actors/scala/actors/Actor.scala b/src/actors/scala/actors/Actor.scala
index beae0652a5..5bde8948ca 100644
--- a/src/actors/scala/actors/Actor.scala
+++ b/src/actors/scala/actors/Actor.scala
@@ -205,6 +205,7 @@ object Actor {
    */
   def loopWhile(cond: => Boolean)(body: => Unit): Unit =
     if (cond) { body andThen loopWhile(cond)(body) }
+    else continue
 
   /**
    * Links <code>self</code> to actor <code>to</code>.
@@ -261,7 +262,7 @@ object Actor {
    */
   def exit(): Nothing = self.exit()
 
-  def continue: Unit = self.kill()
+  def continue: Unit = throw new KillActorException
 }
 
 /**
@@ -612,7 +613,7 @@ trait Actor extends OutputChannel[Any] {
   private var isWaiting = false
 
   // guarded by lock of this
-  private def scheduleActor(f: PartialFunction[Any, Unit], msg: Any) =
+  protected def scheduleActor(f: PartialFunction[Any, Unit], msg: Any) =
     if ((f eq null) && (continuation eq null)) {
       // do nothing (timeout is handled instead)
     }
@@ -697,6 +698,7 @@ trait Actor extends OutputChannel[Any] {
       throw new SuspendActorException
     }
     first
+    throw new KillActorException
   }
 
   private[actors] var links: List[Actor] = Nil
diff --git a/src/actors/scala/actors/Reaction.scala b/src/actors/scala/actors/Reaction.scala
index 1e8321e351..8807efa074 100644
--- a/src/actors/scala/actors/Reaction.scala
+++ b/src/actors/scala/actors/Reaction.scala
@@ -19,10 +19,24 @@ import java.lang.{InterruptedException, Runnable}
  *    return type <code>Nothing</code>.
  *  </p>
  *
- *  @version 0.9.8
+ *  @version 0.9.10
  *  @author Philipp Haller
  */
-private[actors] class ExitActorException extends Throwable
+private[actors] class ExitActorException extends Throwable {
+  /*
+   * For efficiency reasons we do not fill in
+   * the execution stack trace.
+   */
+  override def fillInStackTrace(): Throwable = this
+}
+
+private[actors] class KillActorException extends Throwable {
+  /*
+   * For efficiency reasons we do not fill in
+   * the execution stack trace.
+   */
+  override def fillInStackTrace(): Throwable = this
+}
 
 /** <p>
  *    The abstract class <code>Reaction</code> associates
@@ -31,7 +45,7 @@ private[actors] class ExitActorException extends Throwable
  *    <code>java.lang.Runnable</code></a>.
  *  </p>
  *
- *  @version 0.9.8
+ *  @version 0.9.10
  *  @author Philipp Haller
  */
 /*private[actors]*/ class Reaction(a: Actor,
@@ -47,10 +61,14 @@ private[actors] class ExitActorException extends Throwable
       if (a.shouldExit) // links
         a.exit()
       else {
-        if (f == null)
-          a.act()
-        else
-          f(msg)
+        try {
+          if (f == null)
+            a.act()
+          else
+            f(msg)
+        } catch {
+          case _: KillActorException =>
+        }
         a.kill(); a.exit()
       }
     }
-- 
cgit v1.2.3