The birth of the @switch and @tailrec annotations.

They are located in package scala.annotation. Also in this patch:

 * numerous test cases for both annotations
 * addition of @tailrec and @switch in a few strategic locations
 * fixes for critical section NewScanners methods which were not being
   compiled into switches, immediately proving the value of @switch
 * tail recursive implementations for Iterator.{ dropWhile, drop}
   and List.dropWhile tagged with @tailrec, closing bug #1376

1 files changed, 2 insertions, 0 deletions

diff --git a/src/library/scalax/collection/immutable/Stream.scala b/src/library/scalax/collection/immutable/Stream.scala
index 036fefe70c..4055be40bc 100755
--- a/src/library/scalax/collection/immutable/Stream.scala
+++ b/src/library/scalax/collection/immutable/Stream.scala
@@ -14,6 +14,7 @@ package scalax.collection.immutable
 import mutable.ListBuffer
 import generic.{SequenceTemplate, SequenceFactory, EmptyIterableFactory, Builder, LazyBuilder}
 import annotation.unchecked.uncheckedVariance
+import annotation.tailrec
 
 /**
  * The object <code>Stream</code> provides helper functions
@@ -486,6 +487,7 @@ self =>
    *  @param sep   The separator string printed between consecutive elements.
    */
   def print(sep: String) {
+    @tailrec
     def loop(these: Stream[A], start: String) {
       Console.print(start)
       if (isEmpty) Console.print("empty")