75 lines
2.0 KiB
Plaintext
75 lines
2.0 KiB
Plaintext
|
/* Copyright 2003-2013 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)
|
||
|
|
#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/static_assert.hpp>
|
||
|
|
|
||
|
|
namespace boost{
|
||
|
|
|
||
|
|
namespace multi_index{
|
||
|
|
|
||
|
|
namespace detail{
|
||
|
|
|
||
|
|
/* MPL machinery to construct a linear hierarchy of indices out of
|
||
|
|
* a index list.
|
||
|
|
*/
|
||
|
|
|
||
|
|
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;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
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
|