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/* Copyright 2003-2013 Joaquin M Lopez Munoz.
* 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_HAS_TAG_HPP
#define BOOST_MULTI_INDEX_DETAIL_HAS_TAG_HPP
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <boost/mpl/contains.hpp>
namespace boost{
namespace multi_index{
namespace detail{
/* determines whether an index type has a given tag in its tag list */
template<typename Tag>
struct has_tag
{
template<typename Index>
struct apply:mpl::contains<BOOST_DEDUCED_TYPENAME Index::tag_list,Tag>
{
};
};
} /* namespace multi_index::detail */
} /* namespace multi_index */
} /* namespace boost */
#endif