--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/types/TypedNode.java	Fri Dec 21 10:45:37 2012 -0800
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2012, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.truffle.sl.types;
+
+import java.math.*;
+
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.sl.nodes.*;
+
+public abstract class TypedNode extends ConditionNode {
+
+    @Override
+    public final boolean executeCondition(VirtualFrame frame) {
+        try {
+            return executeBoolean(frame);
+        } catch (UnexpectedResultException ex) {
+            throw new RuntimeException("Illegal type for condition: " + ex.getResult().getClass().getSimpleName());
+        }
+    }
+
+    public abstract boolean executeBoolean(VirtualFrame frame) throws UnexpectedResultException;
+
+    public abstract int executeInteger(VirtualFrame frame) throws UnexpectedResultException;
+
+    public abstract BigInteger executeBigInteger(VirtualFrame frame) throws UnexpectedResultException;
+
+    public abstract String executeString(VirtualFrame frame) throws UnexpectedResultException;
+
+    public abstract Object executeGeneric(VirtualFrame frame);
+}