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+// TR1 utility -*- C++ -*-
+
+// Copyright (C) 2004, 2005, 2006, 2007 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 2, 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.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+/** @file tr1/utility
+ *  This is a TR1 C++ Library header. 
+ */
+
+#ifndef _TR1_UTILITY
+#define _TR1_UTILITY 1
+
+#include "../utility"
+
+namespace std
+{
+_GLIBCXX_BEGIN_NAMESPACE(tr1)
+
+  template<class _Tp> class tuple_size;
+  template<int _Int, class _Tp> class tuple_element;
+
+   // Various functions which give std::pair a tuple-like interface.
+  template<class _Tp1, class _Tp2>
+    struct tuple_size<std::pair<_Tp1, _Tp2> >
+    { static const int value = 2; };
+
+  template<class _Tp1, class _Tp2>
+    const int tuple_size<std::pair<_Tp1, _Tp2> >::value;
+
+  template<class _Tp1, class _Tp2>
+    struct tuple_element<0, std::pair<_Tp1, _Tp2> >
+    { typedef _Tp1 type; };
+ 
+  template<class _Tp1, class _Tp2>
+    struct tuple_element<1, std::pair<_Tp1, _Tp2> >
+    { typedef _Tp2 type; };
+ 
+
+  template<int _Int> struct __pair_get;
+
+  template<>
+    struct __pair_get<0>
+    {
+      template<typename _Tp1, typename _Tp2>
+      static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair)
+      { return __pair.first; }
+
+      template<typename _Tp1, typename _Tp2>
+      static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
+      { return __pair.first; }
+    };
+
+  template<>
+    struct __pair_get<1>
+    {
+      template<typename _Tp1, typename _Tp2>
+      static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair)
+      { return __pair.second; }
+
+      template<typename _Tp1, typename _Tp2>
+      static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
+      { return __pair.second; }
+    };
+
+   template<int _Int, class _Tp1, class _Tp2>
+     inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
+     get(std::pair<_Tp1, _Tp2>& __in)
+     { return __pair_get<_Int>::__get(__in); }
+ 
+   template<int _Int, class _Tp1, class _Tp2>
+     inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
+     get(const std::pair<_Tp1, _Tp2>& __in)
+     { return __pair_get<_Int>::__const_get(__in); }
+
+_GLIBCXX_END_NAMESPACE
+} 
+
+#endif