--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/core/StructNodes.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,56 @@
+/*
+ * 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.core;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.dsl.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.*;
+
+@CoreClass(name = "Struct")
+public abstract class StructNodes {
+
+    @CoreMethod(names = "initialize", needsBlock = true, appendCallNode = true, isSplatted = true)
+    public abstract static class InitalizeNode extends CoreMethodNode {
+
+        public InitalizeNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public InitalizeNode(InitalizeNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public NilPlaceholder initialize(VirtualFrame frame, RubyClass struct, Object[] args, Object block, Node callSite) {
+            CompilerDirectives.transferToInterpreter();
+
+            final RubySymbol[] symbols = new RubySymbol[args.length];
+
+            for (int n = 0; n < args.length; n++) {
+                symbols[n] = (RubySymbol) args[n];
+            }
+
+            for (RubySymbol symbol : symbols) {
+                ModuleNodes.AttrAccessorNode.attrAccessor(getContext(), callSite.getSourceSection(), struct, symbol.toString());
+            }
+
+            if (!RubyNilClass.isNil(block)) {
+                ((RubyProc) block).callWithModifiedSelf(frame.pack(), struct);
+            }
+
+            return NilPlaceholder.INSTANCE;
+        }
+
+    }
+
+}