/* Copyright 2003-2006 Joaquín M López Muñoz.

  * 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/multi_index for library home page.

  */

 #ifndef BOOST_MULTI_INDEX_DETAIL_UNBOUNDED_HPP

 #define BOOST_MULTI_INDEX_DETAIL_UNBOUNDED_HPP

 #if defined(_MSC_VER)&&(_MSC_VER>=1200)

 #pragma once

 #endif

 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */

 #include <boost/detail/workaround.hpp>

 namespace boost{

 namespace multi_index{

 /* dummy type and variable for use in ordered_index::range() */

 namespace detail{

 struct unbounded_type{};

 } /* namespace multi_index::detail */

 namespace{

 #if BOOST_WORKAROUND(BOOST_MSVC,<1300)

 /* The default branch actually works for MSVC 6.0, but seems like

  * the const qualifier reduces the performance of ordered indices! This

  * behavior is hard to explain and probably a test artifact, but it

  * does not hurt to have the workaround anyway.

  */

 static detail::unbounded_type  unbounded_obj=detail::unbounded_type();

 static detail::unbounded_type& unbounded=unbounded_obj;

 #else

 const detail::unbounded_type unbounded=detail::unbounded_type();

 #endif

 } /* unnamed */

 } /* namespace multi_index */

 } /* namespace boost */

 #endif