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diff --git a/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/branch_policy/null_node_metadata.hpp b/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/branch_policy/null_node_metadata.hpp
new file mode 100644
index 0000000..caa8dd7
--- /dev/null
+++ b/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/branch_policy/null_node_metadata.hpp
@@ -0,0 +1,66 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009, 2010 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the terms
+// of the GNU General Public License as published by the Free Software
+// Foundation; either version 3, or (at your option) any later
+// version.
+
+// This library is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file branch_policy/null_node_metadata.hpp
+ * Contains an implementation class for tree-like classes.
+ */
+
+#ifndef PB_DS_0_NODE_METADATA_HPP
+#define PB_DS_0_NODE_METADATA_HPP
+
+#include <ext/pb_ds/detail/types_traits.hpp>
+
+namespace __gnu_pbds
+{
+  namespace detail
+  {
+    /// Constant node iterator.
+    template<typename Key, typename Data, typename _Alloc>
+      struct dumnode_const_iterator
+      {
+      private:
+	typedef types_traits<Key, Data, _Alloc, false>	__traits_type;
+	typedef typename __traits_type::pointer        	const_iterator;
+	
+      public:
+	typedef const_iterator 				value_type;
+	typedef const_iterator 				const_reference;
+	typedef const_reference 	       		reference;
+      };
+  } // namespace detail
+} // namespace __gnu_pbds
+
+#endif