boost/multi_index/detail/unbounded.hpp
/* Copyright 2003-2006 Joaqu�n M L�pez Mu�oz. * 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