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/immutable/Range.scala b/src/library/scala/collection/immutable/Range.scala
index 26e32e08fb..1ebf6e283c 100644
--- a/src/library/scala/collection/immutable/Range.scala
+++ b/src/library/scala/collection/immutable/Range.scala
@@ -38,10 +38,11 @@ import scala.collection.parallel.immutable.ParRange
  *    '''Note:''' this method does not use builders to construct a new range,
  *         and its complexity is O(1).
  */
-@serializable @SerialVersionUID(7618862778670199309L)
+@SerialVersionUID(7618862778670199309L)
 class Range(val start: Int, val end: Int, val step: Int)
 extends IndexedSeq[Int]
    with collection.Parallelizable[ParRange]
+   with Serializable
 {
   def par = ParRange(start, end, step, false)