[857] | 1 | /* Copyright 2003-2005 Joaquín M López Muñoz.
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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_DETAIL_BASE_TYPE_HPP
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| 10 | #define BOOST_MULTI_INDEX_DETAIL_BASE_TYPE_HPP
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| 11 |
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| 12 | #if defined(_MSC_VER)&&(_MSC_VER>=1200)
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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/detail/workaround.hpp>
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| 18 | #include <boost/mpl/at.hpp>
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| 19 | #include <boost/mpl/apply.hpp>
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| 20 | #include <boost/mpl/size.hpp>
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| 21 | #include <boost/multi_index/detail/index_base.hpp>
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| 22 | #include <boost/multi_index/detail/is_index_list.hpp>
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| 23 | #include <boost/multi_index/detail/msvc_index_specifier.hpp>
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| 24 | #include <boost/static_assert.hpp>
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| 25 |
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| 26 | namespace boost{
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| 27 |
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| 28 | namespace multi_index{
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| 29 |
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| 30 | namespace detail{
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| 31 |
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| 32 | /* MPL machinery to construct a linear hierarchy of indices out of
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| 33 | * a index list.
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| 34 | */
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| 35 |
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| 36 | #if BOOST_WORKAROUND(BOOST_MSVC,<1310)
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| 37 | struct index_applier
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| 38 | {
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| 39 | template<typename IndexSpecifierMeta,typename SuperMeta>
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| 40 | struct apply:
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| 41 | msvc_index_specifier<IndexSpecifierMeta::type>::
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| 42 | template result_index_class<SuperMeta>
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| 43 | {
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| 44 | };
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| 45 | };
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| 46 | #else
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| 47 | struct index_applier
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| 48 | {
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| 49 | template<typename IndexSpecifierMeta,typename Super>
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| 50 | struct apply
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| 51 | {
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| 52 | typedef typename IndexSpecifierMeta::type index_specifier;
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| 53 | typedef typename index_specifier::
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| 54 | BOOST_NESTED_TEMPLATE index_class<Super>::type type;
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| 55 | };
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| 56 | };
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| 57 | #endif
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| 58 |
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| 59 | template<int N,typename Value,typename IndexSpecifierList,typename Allocator>
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| 60 | struct nth_layer
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| 61 | {
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| 62 | BOOST_STATIC_CONSTANT(int,length=mpl::size<IndexSpecifierList>::value);
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| 63 |
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| 64 | typedef typename mpl::eval_if_c<
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| 65 | N==length,
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| 66 | mpl::identity<index_base<Value,IndexSpecifierList,Allocator> >,
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| 67 | mpl::apply2<
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| 68 | index_applier,
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| 69 | mpl::at_c<IndexSpecifierList,N>,
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| 70 | nth_layer<N+1,Value,IndexSpecifierList,Allocator>
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| 71 | >
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| 72 | >::type type;
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| 73 | };
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| 74 |
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| 75 | template<typename Value,typename IndexSpecifierList,typename Allocator>
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| 76 | struct multi_index_base_type:nth_layer<0,Value,IndexSpecifierList,Allocator>
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| 77 | {
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| 78 | BOOST_STATIC_ASSERT(detail::is_index_list<IndexSpecifierList>::value);
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| 79 | };
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| 80 |
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| 81 | } /* namespace multi_index::detail */
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| 82 |
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| 83 | } /* namespace multi_index */
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| 84 |
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| 85 | } /* namespace boost */
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| 86 |
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| 87 | #endif
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