Added thirdparty: boost library

thirdparty/include/boost/intrusive/detail/twin.hpp

@@ -0,0 +1,49 @@
+/////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga  2014-2014
+//
+// 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)
+//
+// See http://www.boost.org/libs/intrusive for documentation.
+//
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTRUSIVE_DETAIL_TWIN_HPP
+#define BOOST_INTRUSIVE_DETAIL_TWIN_HPP
+
+#ifndef BOOST_CONFIG_HPP
+#  include <boost/config.hpp>
+#endif
+
+#if defined(BOOST_HAS_PRAGMA_ONCE)
+#  pragma once
+#endif
+
+//A tiny utility to avoid pulling std::pair / utility for
+//very simple algorithms/types
+
+namespace boost {
+namespace intrusive {
+
+template <class T>
+struct twin
+{
+   typedef T type;
+   twin()
+      : first(), second()
+   {}
+
+   twin(const type &f, const type &s)
+      : first(f), second(s)
+   {}
+
+   T first;
+   T second;
+};
+
+}  //namespace intrusive{
+}  //namespace boost{
+
+#endif //BOOST_INTRUSIVE_DETAIL_TWIN_HPP