massive new collections checkin.

1 files changed, 29 insertions, 0 deletions

diff --git a/src/library/scala/collection/immutable/Vector.scala b/src/library/scala/collection/immutable/Vector.scala
new file mode 100755
index 0000000000..7bb76c5518
--- /dev/null
+++ b/src/library/scala/collection/immutable/Vector.scala
@@ -0,0 +1,29 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2009, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+package scala.collection.immutable
+
+import generic._
+import mutable.ArrayBuffer
+
+/** A subtrait of collection.Vector which represents sequences
+ *  that cannot be mutated.
+ */
+trait Vector[+A] extends Sequence[A] with collection.Vector[A] with VectorTemplate[A, Vector[A]] { self =>
+  override protected[this] def newBuilder = Vector.newBuilder
+  override def traversibleBuilder[B]: Builder[B, Vector[B], Any] = Vector.newBuilder[B]
+}
+
+object Vector extends SequenceFactory[Vector] {
+  type Coll = Vector[_]
+  class Impl[A](buf: ArrayBuffer[A]) extends Vector[A] { // todo: insert better vector implementation here
+    def length = buf.length
+    def apply(idx: Int) = buf.apply(idx)
+  }
+  implicit def builderFactory[A]: BuilderFactory[A, Vector[A], Coll] = new BuilderFactory[A, Vector[A], Coll] { def apply(from: Coll) = from.traversibleBuilder[A] }
+  def newBuilder[A]: Builder[A, Vector[A], Any] = new ArrayBuffer[A] mapResult (buf => new Impl(buf))
+}