Switching to the new build system and to the ne...

Switching to the new build system and to the new build system. This is a
MAJOR commit, so be careful when updating.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/library/scala/collection/mutable/DefaultMapModel.scala b/src/library/scala/collection/mutable/DefaultMapModel.scala
new file mode 100644
index 0000000000..6ae089bc3e
--- /dev/null
+++ b/src/library/scala/collection/mutable/DefaultMapModel.scala
@@ -0,0 +1,52 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2004, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |                                         **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+** $Id$
+\*                                                                      */
+
+package scala.collection.mutable;
+
+
+/** This trait is used internally. It implements the mutable <code>Map</code>
+ *  trait in terms of three functions: <code>findEntry</code>, <code>addEntry</code>,
+ *  and <code>entries</code>.
+ *
+ *  @author  Matthias Zenger
+ *  @version 1.0, 08/07/2003
+ */
+trait DefaultMapModel[A, B] extends AnyRef with scala.collection.mutable.Map[A, B] {
+    protected type Entry = DefaultEntry[A,B];
+
+    protected def findEntry(key: A): Option[Entry];
+
+    protected def addEntry(e: Entry): Unit;
+
+    protected def entries: Iterator[Entry];
+
+    def get(key: A) = findEntry(key) match {
+        case None => None
+        case Some(e) => Some(e.value);
+    }
+
+    def update(key: A, value: B) = findEntry(key) match {
+        case None => addEntry(new Entry(key, value));
+        case Some(e) => e.value = value;
+    }
+
+    def elements = new Iterator[Pair[A, B]] {
+        val iter = entries;
+        def hasNext = iter.hasNext;
+        def next = iter.next.toPair;
+    }
+}
+
+[serializable]
+protected class DefaultEntry[A,B](k: A, v: B) extends AnyRef {
+    def key = k;
+    var value = v;
+    def toPair = Pair(k, value);
+    override def toString() = k.toString() + " -> " + value;
+}