diff -r b8a2f4c86745 -r 8ffa211b7f9a stage3/stage3.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stage3/stage3.cc	Thu Aug 27 16:29:23 2009 +0100
@@ -0,0 +1,37 @@
+/*
+ * (c) 20099 Catarina da Costa Boucinha
+ *
+ * Offered to the public under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * This code is made available on the understanding that it will not be
+ * used in safety-critical situations without a full and competent review.
+ */
+
+/*
+ * An IEC 61131-3 IL and ST compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2009-04-24)
+ *
+ */
+
+#include "stage3.hh"
+
+int type_safety(symbol_c *tree_root){
+	visit_expression_type_c visit_expression_type(tree_root);
+
+	(*tree_root).accept(visit_expression_type);
+
+	return 0;
+}
+
+int stage3(symbol_c *tree_root){
+	return type_safety(tree_root);
+}