41 lines
1018 B
Plaintext
41 lines
1018 B
Plaintext
/* 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_IS_INDEX_LIST_HPP
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#define BOOST_MULTI_INDEX_DETAIL_IS_INDEX_LIST_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/empty.hpp>
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#include <boost/mpl/is_sequence.hpp>
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namespace boost{
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namespace multi_index{
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namespace detail{
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template<typename T>
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struct is_index_list
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{
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BOOST_STATIC_CONSTANT(bool,mpl_sequence=mpl::is_sequence<T>::value);
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BOOST_STATIC_CONSTANT(bool,non_empty=!mpl::empty<T>::value);
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BOOST_STATIC_CONSTANT(bool,value=mpl_sequence&&non_empty);
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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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