| /* Copyright 2003-2008 Joaquin M Lopez Munoz. |
| * Distributed under the Boost Software License, Version 1.0. |
| * (See accompanying file LICENSE_1_0.txt or copy at |
| * http://www.boost.org/LICENSE_1_0.txt) |
| * |
| * See http://www.boost.org/libs/multi_index for library home page. |
| */ |
| |
| #ifndef BOOST_MULTI_INDEX_DETAIL_BASE_TYPE_HPP |
| #define BOOST_MULTI_INDEX_DETAIL_BASE_TYPE_HPP |
| |
| #if defined(_MSC_VER)&&(_MSC_VER>=1200) |
| #pragma once |
| #endif |
| |
| #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ |
| #include <boost/detail/workaround.hpp> |
| #include <boost/mpl/at.hpp> |
| #include <boost/mpl/apply.hpp> |
| #include <boost/mpl/size.hpp> |
| #include <boost/multi_index/detail/index_base.hpp> |
| #include <boost/multi_index/detail/is_index_list.hpp> |
| #include <boost/multi_index/detail/msvc_index_specifier.hpp> |
| #include <boost/static_assert.hpp> |
| |
| namespace boost{ |
| |
| namespace multi_index{ |
| |
| namespace detail{ |
| |
| /* MPL machinery to construct a linear hierarchy of indices out of |
| * a index list. |
| */ |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC,<1310) |
| struct index_applier |
| { |
| template<typename IndexSpecifierMeta,typename SuperMeta> |
| struct apply: |
| msvc_index_specifier<IndexSpecifierMeta::type>:: |
| template result_index_class<SuperMeta> |
| { |
| }; |
| }; |
| #else |
| struct index_applier |
| { |
| template<typename IndexSpecifierMeta,typename SuperMeta> |
| struct apply |
| { |
| typedef typename IndexSpecifierMeta::type index_specifier; |
| typedef typename index_specifier:: |
| BOOST_NESTED_TEMPLATE index_class<SuperMeta>::type type; |
| }; |
| }; |
| #endif |
| |
| template<int N,typename Value,typename IndexSpecifierList,typename Allocator> |
| struct nth_layer |
| { |
| BOOST_STATIC_CONSTANT(int,length=mpl::size<IndexSpecifierList>::value); |
| |
| typedef typename mpl::eval_if_c< |
| N==length, |
| mpl::identity<index_base<Value,IndexSpecifierList,Allocator> >, |
| mpl::apply2< |
| index_applier, |
| mpl::at_c<IndexSpecifierList,N>, |
| nth_layer<N+1,Value,IndexSpecifierList,Allocator> |
| > |
| >::type type; |
| }; |
| |
| template<typename Value,typename IndexSpecifierList,typename Allocator> |
| struct multi_index_base_type:nth_layer<0,Value,IndexSpecifierList,Allocator> |
| { |
| BOOST_STATIC_ASSERT(detail::is_index_list<IndexSpecifierList>::value); |
| }; |
| |
| } /* namespace multi_index::detail */ |
| |
| } /* namespace multi_index */ |
| |
| } /* namespace boost */ |
| |
| #endif |