Cleaning up in scala.runtime.*.

Fixed toArray to copy more than one element into the new one. Added
sameElements to Iterator to further simplify the case class support
logic, and because it should be there anyway.

1 files changed, 14 insertions, 1 deletions

diff --git a/src/library/scala/collection/Iterator.scala b/src/library/scala/collection/Iterator.scala
index 70462cb8d2..74109a0e81 100644
--- a/src/library/scala/collection/Iterator.scala
+++ b/src/library/scala/collection/Iterator.scala
@@ -14,7 +14,6 @@ package scala.collection
 import mutable.{Buffer, ArrayBuffer, ListBuffer, StringBuilder}
 import immutable.{List, Stream}
 import annotation.{ tailrec }
-// import immutable.{List, Nil, ::, Stream}
 
 /** The <code>Iterator</code> object provides various functions for
  *  creating specialized iterators.
@@ -1031,6 +1030,20 @@ trait Iterator[+A] { self =>
     buffer
   }
 
+  /** Checks if the other iterator contains the same elements as this one.
+   *
+   *  @note will not terminate for infinite-sized iterators.
+   *  @param that  the other iterator
+   *  @return true, iff both iterators contain the same elements in the same order.
+   */
+  def sameElements(that: Iterator[_]): Boolean = {
+    while (hasNext && that.hasNext)
+      if (next != that.next)
+        return false
+
+    !hasNext && !that.hasNext
+  }
+
   /** Returns a string representation of the elements in this iterator. The resulting string
    *  begins with the string <code>start</code> and is finished by the string
    *  <code>end</code>. Inside, the string representations of elements (w.r.t.