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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
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