--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/methods/MethodDefinitionNode.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,90 @@
+/*
+ * 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.methods;
+
+import com.oracle.truffle.api.*;
+import com.oracle.truffle.api.frame.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.ruby.nodes.*;
+import com.oracle.truffle.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.*;
+import com.oracle.truffle.ruby.runtime.methods.*;
+
+/**
+ * Define a method. That is, store the definition of a method and when executed produce the
+ * executable object that results.
+ */
+@NodeInfo(shortName = "method-def")
+public class MethodDefinitionNode extends RubyNode {
+
+    protected final String name;
+    protected final UniqueMethodIdentifier uniqueIdentifier;
+
+    protected final FrameDescriptor frameDescriptor;
+    protected final RubyRootNode pristineRootNode;
+
+    protected final CallTarget callTarget;
+
+    protected final boolean requiresDeclarationFrame;
+
+    public MethodDefinitionNode(RubyContext context, SourceSection sourceSection, String name, UniqueMethodIdentifier uniqueIdentifier, FrameDescriptor frameDescriptor,
+                    boolean requiresDeclarationFrame, RubyRootNode pristineRootNode, CallTarget callTarget) {
+        super(context, sourceSection);
+        this.name = name;
+        this.uniqueIdentifier = uniqueIdentifier;
+        this.frameDescriptor = frameDescriptor;
+        this.requiresDeclarationFrame = requiresDeclarationFrame;
+        this.pristineRootNode = pristineRootNode;
+        this.callTarget = callTarget;
+    }
+
+    public RubyMethod executeMethod(VirtualFrame frame) {
+        CompilerDirectives.transferToInterpreter();
+
+        MaterializedFrame declarationFrame;
+
+        if (requiresDeclarationFrame) {
+            declarationFrame = frame.materialize();
+        } else {
+            declarationFrame = null;
+        }
+
+        final FrameSlot visibilitySlot = frame.getFrameDescriptor().findFrameSlot(RubyModule.VISIBILITY_FRAME_SLOT_ID);
+
+        Visibility visibility;
+
+        if (visibilitySlot == null) {
+            visibility = Visibility.PUBLIC;
+        } else {
+            Object visibilityObject;
+
+            try {
+                visibilityObject = frame.getObject(visibilitySlot);
+            } catch (FrameSlotTypeException e) {
+                throw new RuntimeException(e);
+            }
+
+            if (visibilityObject instanceof Visibility) {
+                visibility = (Visibility) visibilityObject;
+            } else {
+                visibility = Visibility.PUBLIC;
+            }
+        }
+
+        final InlinableMethodImplementation methodImplementation = new InlinableMethodImplementation(callTarget, declarationFrame, frameDescriptor, pristineRootNode, false, false);
+        return new RubyMethod(getSourceSection(), null, uniqueIdentifier, null, name, visibility, false, methodImplementation);
+    }
+
+    @Override
+    public Object execute(VirtualFrame frame) {
+        return executeMethod(frame);
+    }
+
+}