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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_INDEXED_BY_HPP | |
10 | #define BOOST_MULTI_INDEX_INDEXED_BY_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/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 | #define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE | |
35 | #endif | |
36 | ||
37 | #if BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE<BOOST_MPL_LIMIT_VECTOR_SIZE | |
38 | #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE \ | |
39 | BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE | |
40 | #else | |
41 | #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE | |
42 | #endif | |
43 | ||
44 | #define BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM(z,n,var) \ | |
45 | typename BOOST_PP_CAT(var,n) BOOST_PP_EXPR_IF(n,=mpl::na) | |
46 | ||
47 | namespace boost{ | |
48 | ||
49 | namespace multi_index{ | |
50 | ||
51 | template< | |
52 | BOOST_PP_ENUM( | |
53 | BOOST_MULTI_INDEX_INDEXED_BY_SIZE, | |
54 | BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM,T) | |
55 | > | |
56 | struct indexed_by: | |
57 | mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MULTI_INDEX_INDEXED_BY_SIZE,T)> | |
58 | { | |
59 | }; | |
60 | ||
61 | } /* namespace multi_index */ | |
62 | ||
63 | } /* namespace boost */ | |
64 | ||
65 | #undef BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM | |
66 | #undef BOOST_MULTI_INDEX_INDEXED_BY_SIZE | |
67 | ||
68 | #endif |