ScalaRunTime method to perform sameElements as ...

ScalaRunTime method to perform sameElements as fix for #2867. Review by
odersky.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/library/scala/runtime/ScalaRunTime.scala b/src/library/scala/runtime/ScalaRunTime.scala
index 82573bf4b1..d04824bae1 100644
--- a/src/library/scala/runtime/ScalaRunTime.scala
+++ b/src/library/scala/runtime/ScalaRunTime.scala
@@ -179,6 +179,13 @@ object ScalaRunTime {
    */
   @inline def hash(x: Any): Int = Predef.hash(x)
 
+  /** A helper method for constructing case class equality methods,
+   *  because existential types get in the way of a clean outcome and
+   *  it's performing a series of Any/Any equals comparisons anyway.
+   *  See ticket #2867 for specifics.
+   */
+  def sameElements(xs1: Seq[Any], xs2: Seq[Any]) = xs1 sameElements xs2
+
   /** Given any Scala value, convert it to a String.
    *
    * The primary motivation for this method is to provide a means for