source: NonGTP/Boost/boost/multi_index/indexed_by.hpp @ 857

Revision 857, 2.1 KB checked in by igarcia, 19 years ago (diff)
Line 
1/* Copyright 2003-2005 Joaquín M López Muñoz.
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_INDEXED_BY_HPP
10#define BOOST_MULTI_INDEX_INDEXED_BY_HPP
11
12#if defined(_MSC_VER)&&(_MSC_VER>=1200)
13#pragma once
14#endif
15
16#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
17#include <boost/mpl/vector.hpp>
18#include <boost/preprocessor/cat.hpp>
19#include <boost/preprocessor/control/expr_if.hpp>
20#include <boost/preprocessor/repetition/enum.hpp>
21#include <boost/preprocessor/repetition/enum_params.hpp>
22
23/* An alias to mpl::vector used to hide MPL from the user.
24 * indexed_by contains the index specifiers for instantiation
25 * of a multi_index_container.
26 */
27
28/* This user_definable macro limits the number of elements of an index list;
29 * useful for shortening resulting symbol names (MSVC++ 6.0, for instance,
30 * has problems coping with very long symbol names.)
31 */
32
33#if !defined(BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE)
34#if defined(BOOST_MSVC)&&(BOOST_MSVC<1300)
35#define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE 5
36#else
37#define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE
38#endif
39#endif
40
41#if BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE<BOOST_MPL_LIMIT_VECTOR_SIZE
42#define BOOST_MULTI_INDEX_INDEXED_BY_SIZE \
43  BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE
44#else
45#define BOOST_MULTI_INDEX_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE
46#endif
47
48#define BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM(z,n,var) \
49  typename BOOST_PP_CAT(var,n) BOOST_PP_EXPR_IF(n,=mpl::na)
50
51namespace boost{
52
53namespace multi_index{
54
55template<
56  BOOST_PP_ENUM(
57    BOOST_MULTI_INDEX_INDEXED_BY_SIZE,
58    BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM,T)
59>
60struct indexed_by:
61  mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MULTI_INDEX_INDEXED_BY_SIZE,T)>
62{
63};
64
65} /* namespace multi_index */
66
67} /* namespace boost */
68
69#undef BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM
70#undef BOOST_MULTI_INDEX_INDEXED_BY_SIZE
71
72#endif
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