43 lines
957 B
Plaintext
43 lines
957 B
Plaintext
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/* Copyright 2003-2013 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See http://www.boost.org/libs/multi_index for library home page.
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*/
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#ifndef BOOST_MULTI_INDEX_DETAIL_HAS_TAG_HPP
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#define BOOST_MULTI_INDEX_DETAIL_HAS_TAG_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
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#include <boost/mpl/contains.hpp>
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namespace boost{
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namespace multi_index{
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namespace detail{
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/* determines whether an index type has a given tag in its tag list */
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template<typename Tag>
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struct has_tag
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{
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template<typename Index>
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struct apply:mpl::contains<BOOST_DEDUCED_TYPENAME Index::tag_list,Tag>
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{
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};
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};
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} /* namespace multi_index::detail */
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} /* namespace multi_index */
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} /* namespace boost */
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#endif
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