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diff --git a/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp b/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp
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index 0000000..fbaace2
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+++ b/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/tree_policy/node_metadata_selector.hpp
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+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009, 2011 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 tree_policy/node_metadata_selector.hpp
+ * Contains an implementation class for trees.
+ */
+
+#ifndef PB_DS_TREE_NODE_METADATA_DISPATCH_HPP
+#define PB_DS_TREE_NODE_METADATA_DISPATCH_HPP
+
+#include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
+#include <ext/pb_ds/detail/types_traits.hpp>
+
+namespace __gnu_pbds
+{
+  namespace detail
+  {
+    /**
+     *  @addtogroup traits Traits
+     *  @{
+     */
+
+    /// Tree metadata helper.
+    template<typename Node_Update, bool _BTp>
+      struct tree_metadata_helper;
+
+    /// Specialization, false.
+    template<typename Node_Update>
+      struct tree_metadata_helper<Node_Update, false>
+      {
+	typedef typename Node_Update::metadata_type 	type;
+      };
+
+    /// Specialization, true.
+    template<typename Node_Update>
+      struct tree_metadata_helper<Node_Update, true>
+      {
+	typedef null_type 				type;
+      };
+
+    /// Tree node metadata dispatch.
+    template<typename Key,
+	     typename Data,
+	     typename Cmp_Fn,
+	     template<typename Node_CItr,
+		      typename Const_Iterator,
+		      typename Cmp_Fn_,
+		      typename _Alloc_>
+	     class Node_Update,
+	     typename _Alloc>
+    struct tree_node_metadata_dispatch
+    {
+    private:
+      typedef dumnode_const_iterator<Key, Data, _Alloc>		__it_type;
+      typedef Node_Update<__it_type, __it_type, Cmp_Fn, _Alloc>	__node_u;
+      typedef null_node_update<__it_type, __it_type, Cmp_Fn, _Alloc> __nnode_u;
+
+      enum
+	{
+	  null_update = is_same<__node_u, __nnode_u>::value
+	};
+
+    public:
+      typedef typename tree_metadata_helper<__node_u, null_update>::type type;
+    };
+    //@}
+  } // namespace detail
+} // namespace __gnu_pbds
+
+#endif // #ifndef PB_DS_TREE_NODE_METADATA_DISPATCH_HPP