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diff --git a/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/type_utils.hpp b/i686-linux-gnu-4.7/usr/include/c++/4.7/ext/pb_ds/detail/type_utils.hpp
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@@ -0,0 +1,167 @@
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2007, 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 detail/type_utils.hpp
+ * Contains utilities for handnling types. All of these classes are based on
+ * Modern C++ by Andrei Alxandrescu.
+ */
+
+#ifndef PB_DS_TYPE_UTILS_HPP
+#define PB_DS_TYPE_UTILS_HPP
+
+#include <cstddef>
+#include <utility>
+#include <tr1/type_traits>
+#include <ext/type_traits.h>
+#include <ext/numeric_traits.h>
+
+namespace __gnu_pbds
+{
+  namespace detail
+  {
+    using std::tr1::is_same;
+    using std::tr1::is_const;
+    using std::tr1::is_pointer;
+    using std::tr1::is_reference;
+    using std::tr1::is_fundamental;
+    using std::tr1::is_member_object_pointer;
+    using std::tr1::is_member_pointer;
+    using std::tr1::is_base_of;
+    using std::tr1::remove_const;
+    using std::tr1::remove_reference;
+
+    // Need integral_const<bool, true> <-> integral_const<int, 1>, so
+    // because of this use the following typedefs instead of importing
+    // std::tr1's.
+    using std::tr1::integral_constant;
+    typedef std::tr1::integral_constant<int, 1> true_type;
+    typedef std::tr1::integral_constant<int, 0> false_type;
+
+    using __gnu_cxx::__conditional_type;
+    using __gnu_cxx::__numeric_traits;
+
+    template<typename T>
+    struct is_const_pointer
+    {
+      enum
+	{
+	  value = is_const<T>::value && is_pointer<T>::value
+	};
+    };
+
+    template<typename T>
+    struct is_const_reference
+    {
+      enum
+	{
+	  value = is_const<T>::value && is_reference<T>::value
+	};
+    };
+
+    template<typename T>
+    struct is_simple
+    {
+      enum
+	{
+	  value = is_fundamental<typename remove_const<T>::type>::value 
+	  || is_pointer<typename remove_const<T>::type>::value 
+	  || is_member_pointer<T>::value 
+	};
+    };
+
+    template<typename T>
+    class is_pair
+    {
+    private:
+      template<typename U>
+      struct is_pair_imp
+      {
+	enum
+	  {
+	    value = 0
+	  };
+      };
+
+      template<typename U, typename V>
+      struct is_pair_imp<std::pair<U,V> >
+      {
+	enum
+	  {
+	    value = 1
+	  };
+      };
+
+    public:
+      enum
+	{
+	  value = is_pair_imp<T>::value
+	};
+    };
+
+    // Use C++0x's static_assert if possible.
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+#define PB_DS_STATIC_ASSERT(UNIQUE, E)  static_assert(E, #UNIQUE)
+#else
+    template<bool>
+    struct __static_assert;
+
+    template<>
+    struct __static_assert<true>
+    { };
+
+    template<int>
+    struct __static_assert_dumclass
+    {
+      enum
+	{
+	  v = 1
+	};
+    };
+
+#define PB_DS_STATIC_ASSERT(UNIQUE, E)  \
+    typedef __gnu_pbds::detail::__static_assert_dumclass<sizeof(__gnu_pbds::detail::__static_assert<bool(E)>)> UNIQUE##__static_assert_type
+
+#endif
+
+    template<typename Type>
+    struct type_to_type
+    {
+      typedef Type type;
+    };
+  } // namespace detail
+} // namespace __gnu_pbds
+
+#endif