Added final modifiers to several classes used b...

Added final modifiers to several classes used by Predef implicits.
Review by community.

2 files changed, 3 insertions, 3 deletions

diff --git a/src/library/scala/Predef.scala b/src/library/scala/Predef.scala
index 1b9f4b75ba..5684c91aaa 100644
--- a/src/library/scala/Predef.scala
+++ b/src/library/scala/Predef.scala
@@ -117,7 +117,7 @@ object Predef extends LowPriorityImplicits {
       throw new IllegalArgumentException("requirement failed: "+ message)
   }
 
-  class Ensuring[A](x: A) {
+  final class Ensuring[A](val x: A) {
     def ensuring(cond: Boolean): A = { assert(cond); x }
     def ensuring(cond: Boolean, msg: Any): A = { assert(cond, msg); x }
     def ensuring(cond: A => Boolean): A = { assert(cond(x)); x }
@@ -139,7 +139,7 @@ object Predef extends LowPriorityImplicits {
     def unapply[A, B, C](x: Tuple3[A, B, C]): Option[Tuple3[A, B, C]] = Some(x)
   }
 
-  class ArrowAssoc[A](x: A) {
+  final class ArrowAssoc[A](val x: A) {
     @inline def -> [B](y: B): Tuple2[A, B] = Tuple2(x, y)
     def →[B](y: B): Tuple2[A, B] = ->(y)
   }
diff --git a/src/library/scala/collection/immutable/StringOps.scala b/src/library/scala/collection/immutable/StringOps.scala
index 9138c2bbac..db6479742b 100644
--- a/src/library/scala/collection/immutable/StringOps.scala
+++ b/src/library/scala/collection/immutable/StringOps.scala
@@ -17,7 +17,7 @@ import mutable.StringBuilder
 /**
  * @since 2.8
  */
-class StringOps(override val repr: String) extends StringLike[String] {
+final class StringOps(override val repr: String) extends StringLike[String] {
 
   override protected[this] def thisCollection: WrappedString = new WrappedString(repr)
   override protected[this] def toCollection(repr: String): WrappedString = new WrappedString(repr)