--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/DefinedNode.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This
+ * code is released under a tri EPL/GPL/LGPL license. You can use it,
+ * redistribute it and/or modify it under the terms of the:
+ *
+ * Eclipse Public License version 1.0
+ * GNU General Public License version 2
+ * GNU Lesser General Public License version 2.1
+ */
+package com.oracle.truffle.ruby.nodes;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.ruby.runtime.*;
+
+/**
+ * Switches execution to the parallel {@link RubyNode#isDefined} semantic path. Represents the
+ * {@code defined?} keyword in Ruby.
+ */
+@NodeInfo(shortName = "defined")
+public class DefinedNode extends RubyNode {
+
+    @Child protected RubyNode child;
+
+    public DefinedNode(RubyContext context, SourceSection sourceSection, RubyNode child) {
+        super(context, sourceSection);
+        this.child = adoptChild(child);
+    }
+
+    @Override
+    public Object execute(VirtualFrame frame) {
+        return child.isDefined(frame);
+    }
+
+}