--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/core/ProcNodes.java	Mon Jan 06 17:12:09 2014 +0000
@@ -0,0 +1,77 @@
+/*
+ * 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.ruby.runtime.*;
+import com.oracle.truffle.ruby.runtime.core.*;
+
+@CoreClass(name = "Proc")
+public abstract class ProcNodes {
+
+    @CoreMethod(names = {"call", "[]"}, isSplatted = true)
+    public abstract static class CallNode extends CoreMethodNode {
+
+        public CallNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public CallNode(CallNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public Object call(VirtualFrame frame, RubyProc proc, Object[] args) {
+            return proc.call(frame.getCaller(), args);
+        }
+
+    }
+
+    @CoreMethod(names = "initialize", needsBlock = true, maxArgs = 0)
+    public abstract static class InitializeNode extends CoreMethodNode {
+
+        public InitializeNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public InitializeNode(InitializeNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public NilPlaceholder initialize(VirtualFrame frame, RubyProc proc, RubyProc block) {
+            final RubyArguments callerArguments = frame.getCaller().unpack().getArguments(RubyArguments.class);
+            proc.initialize(RubyProc.Type.PROC, callerArguments.getSelf(), callerArguments.getBlock(), block.getMethod());
+            return NilPlaceholder.INSTANCE;
+        }
+
+    }
+
+    @CoreMethod(names = "lambda?", maxArgs = 0)
+    public abstract static class LambdaNode extends CoreMethodNode {
+
+        public LambdaNode(RubyContext context, SourceSection sourceSection) {
+            super(context, sourceSection);
+        }
+
+        public LambdaNode(LambdaNode prev) {
+            super(prev);
+        }
+
+        @Specialization
+        public boolean lambda(RubyProc proc) {
+            return proc.getType() == RubyProc.Type.LAMBDA;
+        }
+
+    }
+
+}