/* 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 |