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+//
+// detail/type_traits.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_DETAIL_TYPE_TRAITS_HPP
+#define BOOST_ASIO_DETAIL_TYPE_TRAITS_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS)
+# include <type_traits>
+#else // defined(BOOST_ASIO_HAS_TYPE_TRAITS)
+# include <boost/type_traits/add_const.hpp>
+# include <boost/type_traits/is_const.hpp>
+# include <boost/type_traits/is_convertible.hpp>
+# include <boost/type_traits/is_function.hpp>
+# include <boost/type_traits/is_same.hpp>
+# include <boost/type_traits/remove_pointer.hpp>
+# include <boost/type_traits/remove_reference.hpp>
+# include <boost/utility/enable_if.hpp>
+#endif // defined(BOOST_ASIO_HAS_TYPE_TRAITS)
+
+namespace boost {
+namespace asio {
+
+#if defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS)
+using std::add_const;
+using std::enable_if;
+using std::is_const;
+using std::is_convertible;
+using std::is_function;
+using std::is_same;
+using std::remove_pointer;
+using std::remove_reference;
+#else // defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS)
+using boost::add_const;
+template <bool Condition, typename Type = void>
+struct enable_if : boost::enable_if_c<Condition, Type> {};
+using boost::is_const;
+using boost::is_convertible;
+using boost::is_function;
+using boost::is_same;
+using boost::remove_pointer;
+using boost::remove_reference;
+#endif // defined(BOOST_ASIO_HAS_STD_TYPE_TRAITS)
+
+} // namespace asio
+} // namespace boost
+
+#endif // BOOST_ASIO_DETAIL_TYPE_TRAITS_HPP