Made 3 classes in the standard library into value classes.

2 files changed, 3 insertions, 3 deletions

diff --git a/src/library/scala/Predef.scala b/src/library/scala/Predef.scala
index 891437c928..016004b910 100644
--- a/src/library/scala/Predef.scala
+++ b/src/library/scala/Predef.scala
@@ -214,7 +214,7 @@ object Predef extends LowPriorityImplicits {
       throw new IllegalArgumentException("requirement failed: "+ message)
   }
 
-  final class Ensuring[A](val __resultOfEnsuring: A) extends AnyRef {
+  final class Ensuring[A](val __resultOfEnsuring: A) extends AnyVal {
     // `__resultOfEnsuring` must be a public val to allow inlining.
     // See comments in ArrowAssoc for more.
     @deprecated("Use __resultOfEnsuring instead", "2.10.0")
@@ -246,7 +246,7 @@ object Predef extends LowPriorityImplicits {
     def unapply[A, B, C](x: Tuple3[A, B, C]): Option[Tuple3[A, B, C]] = Some(x)
   }
 
-  final class ArrowAssoc[A](val __leftOfArrow: A) extends AnyRef {
+  final class ArrowAssoc[A](val __leftOfArrow: A) extends AnyVal {
     // `__leftOfArrow` must be a public val to allow inlining. The val
     // used to be called `x`, but now goes by `__leftOfArrow`, as that
     // reduces the chances of a user's writing `foo.__leftOfArrow` and
diff --git a/src/library/scala/collection/immutable/StringOps.scala b/src/library/scala/collection/immutable/StringOps.scala
index 09cbd247e9..97609b4c4d 100644
--- a/src/library/scala/collection/immutable/StringOps.scala
+++ b/src/library/scala/collection/immutable/StringOps.scala
@@ -28,7 +28,7 @@ import mutable.StringBuilder
  *  @define Coll StringOps
  *  @define coll string
  */
-final class StringOps(override val repr: String) extends AnyRef with StringLike[String] {
+final class StringOps(override val repr: String) extends AnyVal with StringLike[String] {
 
   override protected[this] def thisCollection: WrappedString = new WrappedString(repr)
   override protected[this] def toCollection(repr: String): WrappedString = new WrappedString(repr)