--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/methods/BlockDefinitionNode.java	Tue Jan 07 18:53:04 2014 +0100
@@ -0,0 +1,52 @@
+/*
+ * 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 block. That is, store the definition of a block and when executed produce the executable
+ * object that results.
+ */
+@NodeInfo(shortName = "block-def")
+public class BlockDefinitionNode extends MethodDefinitionNode {
+
+    public BlockDefinitionNode(RubyContext context, SourceSection sourceSection, String name, UniqueMethodIdentifier uniqueIdentifier, FrameDescriptor frameDescriptor,
+                    boolean requiresDeclarationFrame, RubyRootNode pristineRootNode, CallTarget callTarget) {
+        super(context, sourceSection, name, uniqueIdentifier, frameDescriptor, requiresDeclarationFrame, pristineRootNode, callTarget);
+    }
+
+    @Override
+    public Object execute(VirtualFrame frame) {
+        final RubyContext context = getContext();
+
+        MaterializedFrame declarationFrame;
+
+        if (requiresDeclarationFrame) {
+            declarationFrame = frame.materialize();
+        } else {
+            declarationFrame = null;
+        }
+
+        final RubyArguments arguments = frame.getArguments(RubyArguments.class);
+
+        final InlinableMethodImplementation methodImplementation = new InlinableMethodImplementation(callTarget, declarationFrame, frameDescriptor, pristineRootNode, true, false);
+        final RubyMethod method = new RubyMethod(getSourceSection(), null, uniqueIdentifier, null, name, Visibility.PUBLIC, false, methodImplementation);
+
+        return new RubyProc(context.getCoreLibrary().getProcClass(), RubyProc.Type.PROC, arguments.getSelf(), arguments.getBlock(), method);
+    }
+
+}