1 files changed, 38 insertions, 0 deletions
diff --git a/src/library/scalax/collection/immutable/EmptySet.scala b/src/library/scalax/collection/immutable/EmptySet.scala
new file mode 100755
index 0000000000..32c4915a49
--- /dev/null
+++ b/src/library/scalax/collection/immutable/EmptySet.scala
@@ -0,0 +1,38 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2009, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+\*                                                                      */
+
+// $Id: EmptySet.scala 16893 2009-01-13 13:09:22Z cunei $
+
+
+
+package scalax.collection.immutable
+
+import collection.generic.Builder
+
+/** This class implements empty immutable sets
+ *  @author  Martin Oderskty
+ *  @version 1.0, 019/01/2007
+ */
+@serializable
+class EmptySet[A] extends Set[A] {
+
+  def size: Int = 0
+
+  def contains(elem: A): Boolean = false
+
+  def + (elem: A): Set[A] = new Set1(elem)
+
+  def - (elem: A): Set[A] = this
+
+  def elements: Iterator[A] = Iterator.empty
+
+  override def foreach(f: A => Unit): Unit = {}
+}
+
+
+