Make Range.Partial a value class

1 files changed, 1 insertions, 1 deletions

diff --git a/src/library/scala/collection/immutable/Range.scala b/src/library/scala/collection/immutable/Range.scala
index d3fe367e50..2fe75343d1 100644
--- a/src/library/scala/collection/immutable/Range.scala
+++ b/src/library/scala/collection/immutable/Range.scala
@@ -512,7 +512,7 @@ object Range {
 
   // As there is no appealing default step size for not-really-integral ranges,
   // we offer a partially constructed object.
-  class Partial[T, U](f: T => U) {
+  class Partial[T, U](private val f: T => U) extends AnyVal {
     def by(x: T): U = f(x)
   }