--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/undefined.cpp	Mon Aug 17 22:08:33 2009 -0700
@@ -0,0 +1,82 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Pymonkey.
+ *
+ * The Initial Developer of the Original Code is Mozilla.
+ * Portions created by the Initial Developer are Copyright (C) 2007
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Atul Varma <atul@mozilla.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "undefined.h"
+
+static Py_ssize_t PYM_undefinedLength(PyObject *o) {
+  return 0;
+};
+
+static PyMappingMethods PYM_undefinedAsMapping = {
+  PYM_undefinedLength,         /*mp_length*/
+  0,                           /*mp_subscript*/
+  0                            /*mp_ass_subscript*/
+};
+
+static PyObject *PYM_undefinedRepr(PyObject *o) {
+  return PyString_FromString("pymonkey.undefined");
+}
+
+// TODO: We should make this behave as much like JavaScript's
+// "undefined" value as possible; e.g., its string value should
+// be "undefined", the singleton should be falsy, etc.
+PyTypeObject PYM_undefinedType = {
+  PyObject_HEAD_INIT(NULL)
+  0,                           /*ob_size*/
+  "pymonkey.undefined",        /*tp_name*/
+  sizeof(PYM_undefinedObject), /*tp_basicsize*/
+  0,                           /*tp_itemsize*/
+  0,                           /*tp_dealloc*/
+  0,                           /*tp_print*/
+  0,                           /*tp_getattr*/
+  0,                           /*tp_setattr*/
+  0,                           /*tp_compare*/
+  PYM_undefinedRepr,           /*tp_repr*/
+  0,                           /*tp_as_number*/
+  0,                           /*tp_as_sequence*/
+  &PYM_undefinedAsMapping,     /*tp_as_mapping*/
+  0,                           /*tp_hash */
+  0,                           /*tp_call*/
+  PYM_undefinedRepr,           /*tp_str*/
+  0,                           /*tp_getattro*/
+  0,                           /*tp_setattro*/
+  0,                           /*tp_as_buffer*/
+  Py_TPFLAGS_DEFAULT,          /*tp_flags*/
+  /* tp_doc */
+  "Pythonic equivalent of JavaScript's 'undefined' value",
+};
+
+PYM_undefinedObject *PYM_undefined;