Deprecated the @serializable annotation, introd...

Deprecated the @serializable annotation, introduce a new trait
"scala.Serializable" which has to be extended instead (cross-platform).

Known issues:
 - Companion objects of serializable classes (including case classes) are automatically made serializable. However, they don't extend "Serializable" statically because of the known difficulty (should be done before typing, but hard).
 - Writing "case class C() extends Serializable" gives "error: trait Serializable is inherited twice"
 - Functions are serializable, but don't extend Serializable dynamically (could be fixed by making FunctionN Serializable - shouldn't we?)

Note that @SerialVersionUID continues to be an annotation; it generates
a static field, which is not possible otherwise in scala.

Review by dragos, extempore.

Question to dragos: in JavaPlatform.isMaybeBoxed, why is there a test
for "JavaSerializableClass"? Is that correct?

1 files changed, 2 insertions, 1 deletions

diff --git a/src/library/scala/collection/mutable/ArrayStack.scala b/src/library/scala/collection/mutable/ArrayStack.scala
index 4cf6b78de3..909324f87c 100644
--- a/src/library/scala/collection/mutable/ArrayStack.scala
+++ b/src/library/scala/collection/mutable/ArrayStack.scala
@@ -59,7 +59,7 @@ object ArrayStack extends SeqFactory[ArrayStack] {
  *  @define mayNotTerminateInf
  *  @define willNotTerminateInf
  */
-@cloneable @serializable @SerialVersionUID(8565219180626620510L)
+@cloneable @SerialVersionUID(8565219180626620510L)
 class ArrayStack[T] private(private var table : Array[AnyRef],
                             private var index : Int)
 extends Seq[T]
@@ -67,6 +67,7 @@ extends Seq[T]
    with GenericTraversableTemplate[T, ArrayStack]
    with Cloneable[ArrayStack[T]]
    with Builder[T, ArrayStack[T]]
+   with Serializable
 {
   def this() = this(new Array[AnyRef](1), 0)