1 files changed, 43 insertions, 0 deletions
diff --git a/src/dotnet-library/scala/collection/immutable/Set2.scala b/src/dotnet-library/scala/collection/immutable/Set2.scala
new file mode 100755
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+++ b/src/dotnet-library/scala/collection/immutable/Set2.scala
@@ -0,0 +1,43 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2007, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |                                         **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id: ListSet.scala 9554 2007-01-04 16:30:16 +0000 (Thu, 04 Jan 2007) odersky $
+
+
+
+package scala.collection.immutable
+
+/** This class implements empty immutable maps
+ *  @author  Martin Oderskty
+ *  @version 1.0, 019/01/2007
+ */
+[serializable]
+class Set2[A](elem1: A, elem2: A) extends Set[A] {
+
+  def empty[C]: Set[C] = new EmptySet[C]
+
+  def size: Int = 2
+
+  def contains(elem: A): Boolean =
+    elem == elem1 || elem == elem2
+
+  def + (elem: A): Set[A] =
+    if (contains(elem)) this
+    else new Set3(elem1, elem2, elem)
+
+  def - (elem: A): Set[A] =
+    if (elem == elem1) new Set1(elem2)
+    else if (elem == elem2) new Set1(elem1)
+    else this
+
+  def elements: Iterator[A] =
+    Iterator.fromValues(elem1, elem2)
+}
+
+
+