| 1 | /* Copyright 2003-2013 Joaquin M Lopez Munoz. |
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| 2 | * Distributed under the Boost Software License, Version 1.0. |
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| 3 | * (See accompanying file LICENSE_1_0.txt or copy at |
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| 4 | * http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | * |
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| 6 | * See http://www.boost.org/libs/multi_index for library home page. |
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| 7 | */ |
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| 8 | |
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| 9 | #ifndef BOOST_MULTI_INDEX_INDEXED_BY_HPP |
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| 10 | #define BOOST_MULTI_INDEX_INDEXED_BY_HPP |
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| 11 | |
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| 12 | #if defined(_MSC_VER) |
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| 13 | #pragma once |
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| 14 | #endif |
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| 15 | |
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| 16 | #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ |
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| 17 | #include <boost/mpl/vector.hpp> |
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| 18 | #include <boost/preprocessor/cat.hpp> |
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| 19 | #include <boost/preprocessor/control/expr_if.hpp> |
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| 20 | #include <boost/preprocessor/repetition/enum.hpp> |
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| 21 | #include <boost/preprocessor/repetition/enum_params.hpp> |
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| 22 | |
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| 23 | /* An alias to mpl::vector used to hide MPL from the user. |
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| 24 | * indexed_by contains the index specifiers for instantiation |
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| 25 | * of a multi_index_container. |
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| 26 | */ |
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| 27 | |
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| 28 | /* This user_definable macro limits the number of elements of an index list; |
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| 29 | * useful for shortening resulting symbol names (MSVC++ 6.0, for instance, |
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| 30 | * has problems coping with very long symbol names.) |
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| 31 | */ |
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| 32 | |
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| 33 | #if !defined(BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE) |
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| 34 | #define BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE |
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| 35 | #endif |
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| 36 | |
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| 37 | #if BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE<BOOST_MPL_LIMIT_VECTOR_SIZE |
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| 38 | #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE \ |
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| 39 | BOOST_MULTI_INDEX_LIMIT_INDEXED_BY_SIZE |
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| 40 | #else |
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| 41 | #define BOOST_MULTI_INDEX_INDEXED_BY_SIZE BOOST_MPL_LIMIT_VECTOR_SIZE |
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| 42 | #endif |
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| 43 | |
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| 44 | #define BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM(z,n,var) \ |
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| 45 | typename BOOST_PP_CAT(var,n) BOOST_PP_EXPR_IF(n,=mpl::na) |
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| 46 | |
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| 47 | namespace boost{ |
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| 48 | |
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| 49 | namespace multi_index{ |
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| 50 | |
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| 51 | template< |
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| 52 | BOOST_PP_ENUM( |
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| 53 | BOOST_MULTI_INDEX_INDEXED_BY_SIZE, |
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| 54 | BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM,T) |
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| 55 | > |
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| 56 | struct indexed_by: |
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| 57 | mpl::vector<BOOST_PP_ENUM_PARAMS(BOOST_MULTI_INDEX_INDEXED_BY_SIZE,T)> |
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| 58 | { |
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| 59 | }; |
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| 60 | |
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| 61 | } /* namespace multi_index */ |
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| 62 | |
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| 63 | } /* namespace boost */ |
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| 64 | |
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| 65 | #undef BOOST_MULTI_INDEX_INDEXED_BY_TEMPLATE_PARM |
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| 66 | #undef BOOST_MULTI_INDEX_INDEXED_BY_SIZE |
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| 67 | |
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| 68 | #endif |
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| 69 | |
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