Chris@101: /* Copyright 2003-2013 Joaquin M Lopez Munoz.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  * (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  * http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  *
Chris@16:  * See http://www.boost.org/libs/multi_index for library home page.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_MULTI_INDEX_DETAIL_UNBOUNDED_HPP
Chris@16: #define BOOST_MULTI_INDEX_DETAIL_UNBOUNDED_HPP
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
Chris@16: #include <boost/detail/workaround.hpp>
Chris@16: 
Chris@16: namespace boost{
Chris@16: 
Chris@16: namespace multi_index{
Chris@16: 
Chris@16: /* dummy type and variable for use in ordered_index::range() */
Chris@16: 
Chris@16: /* ODR-abiding technique shown at the example attached to
Chris@16:  * http://lists.boost.org/Archives/boost/2006/07/108355.php
Chris@16:  */
Chris@16: 
Chris@16: namespace detail{class unbounded_helper;}
Chris@16: 
Chris@16: detail::unbounded_helper unbounded(detail::unbounded_helper);
Chris@16: 
Chris@16: namespace detail{
Chris@16: 
Chris@16: class unbounded_helper
Chris@16: {
Chris@16:   unbounded_helper(){}
Chris@16:   unbounded_helper(const unbounded_helper&){}
Chris@16:   friend unbounded_helper multi_index::unbounded(unbounded_helper);
Chris@16: };
Chris@16: 
Chris@16: typedef unbounded_helper (*unbounded_type)(unbounded_helper);
Chris@16: 
Chris@16: } /* namespace multi_index::detail */
Chris@16: 
Chris@16: inline detail::unbounded_helper unbounded(detail::unbounded_helper)
Chris@16: {
Chris@16:   return detail::unbounded_helper();
Chris@16: }
Chris@16: 
Chris@16: /* tags used in the implementation of range */
Chris@16: 
Chris@16: namespace detail{
Chris@16: 
Chris@16: struct none_unbounded_tag{};
Chris@16: struct lower_unbounded_tag{};
Chris@16: struct upper_unbounded_tag{};
Chris@16: struct both_unbounded_tag{};
Chris@16: 
Chris@16: } /* namespace multi_index::detail */
Chris@16: 
Chris@16: } /* namespace multi_index */
Chris@16: 
Chris@16: } /* namespace boost */
Chris@16: 
Chris@16: #endif