Add a helper method drop to ScalaRunTime.

We should do a lot more of this - it's ridiculously difficult
and error prone to generate code of this kind involving implicits,
type inference, etc. where the same goal is trivially accomplished
by generating a method call and letting the typer work out the
details.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/library/scala/runtime/ScalaRunTime.scala b/src/library/scala/runtime/ScalaRunTime.scala
index 77fe2eb1e1..315f56bd4e 100644
--- a/src/library/scala/runtime/ScalaRunTime.scala
+++ b/src/library/scala/runtime/ScalaRunTime.scala
@@ -12,7 +12,7 @@ package runtime
 import scala.collection.{ Seq, IndexedSeq, TraversableView, AbstractIterator }
 import scala.collection.mutable.WrappedArray
 import scala.collection.immutable.{ StringLike, NumericRange, List, Stream, Nil, :: }
-import scala.collection.generic.{ Sorted }
+import scala.collection.generic.{ Sorted, IsTraversableLike }
 import scala.reflect.{ ClassTag, classTag }
 import scala.util.control.ControlThrowable
 import java.lang.{ Class => jClass }
@@ -48,6 +48,10 @@ object ScalaRunTime {
     names.toSet
   }
 
+  // A helper method to make my life in the pattern matcher a lot easier.
+  def drop[Repr](coll: Repr, num: Int)(implicit traversable: IsTraversableLike[Repr]): Repr =
+    traversable conversion coll drop num
+
   /** Return the class object representing an array with element class `clazz`.
    */
   def arrayClass(clazz: jClass[_]): jClass[_] = {