--- a/undefined.c	Fri Jul 10 17:39:48 2009 -0700
+++ b/undefined.c	Fri Jul 10 18:41:14 2009 -0700
@@ -36,6 +36,20 @@
 
 #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.
@@ -50,13 +64,13 @@
   0,                           /*tp_getattr*/
   0,                           /*tp_setattr*/
   0,                           /*tp_compare*/
-  0,                           /*tp_repr*/
+  PYM_undefinedRepr,           /*tp_repr*/
   0,                           /*tp_as_number*/
   0,                           /*tp_as_sequence*/
-  0,                           /*tp_as_mapping*/
+  &PYM_undefinedAsMapping,     /*tp_as_mapping*/
   0,                           /*tp_hash */
   0,                           /*tp_call*/
-  0,                           /*tp_str*/
+  PYM_undefinedRepr,           /*tp_str*/
   0,                           /*tp_getattro*/
   0,                           /*tp_setattro*/
   0,                           /*tp_as_buffer*/
@@ -65,4 +79,4 @@
   "Pythonic equivalent of JavaScript's 'undefined' value",
 };
 
-PyObject *PYM_undefined = (PyObject *) &PYM_undefinedType;
+PYM_undefinedObject *PYM_undefined;