1/* Copyright 2003-2013 Joaquin M Lopez Munoz.
2 * Distributed under the Boost Software License, Version 1.0.
3 * (See accompanying file LICENSE_1_0.txt or copy at
4 * http://www.boost.org/LICENSE_1_0.txt)
5 *
6 * See http://www.boost.org/libs/multi_index for library home page.
7 */
8
9#ifndef BOOST_MULTI_INDEX_DETAIL_IS_INDEX_LIST_HPP
10#define BOOST_MULTI_INDEX_DETAIL_IS_INDEX_LIST_HPP
11
12#if defined(_MSC_VER)
13#pragma once
14#endif
15
16#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
17#include <boost/mpl/empty.hpp>
18#include <boost/mpl/is_sequence.hpp>
19
20namespace boost{
21
22namespace multi_index{
23
24namespace detail{
25
26template<typename T>
27struct is_index_list
28{
29 BOOST_STATIC_CONSTANT(bool,mpl_sequence=mpl::is_sequence<T>::value);
30 BOOST_STATIC_CONSTANT(bool,non_empty=!mpl::empty<T>::value);
31 BOOST_STATIC_CONSTANT(bool,value=mpl_sequence&&non_empty);
32};
33
34} /* namespace multi_index::detail */
35
36} /* namespace multi_index */
37
38} /* namespace boost */
39
40#endif
41

source code of boost/libs/multi_index/include/boost/multi_index/detail/is_index_list.hpp