ext-boost/boost/intrusive/detail/get_value_traits.hpp
2014-12-28 01:22:08 -02:00

219 lines
6.8 KiB
C++

/////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2014-2014
//
// 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/intrusive for documentation.
//
/////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTRUSIVE_DETAIL_GET_VALUE_TRAITS_HPP
#define BOOST_INTRUSIVE_DETAIL_GET_VALUE_TRAITS_HPP
#if defined(_MSC_VER)
# pragma once
#endif
#include <boost/intrusive/detail/config_begin.hpp>
#include <boost/intrusive/detail/mpl.hpp>
#include <boost/intrusive/detail/hook_traits.hpp>
namespace boost {
namespace intrusive {
#ifndef BOOST_INTRUSIVE_DOXYGEN_INVOKED
template<class SupposedValueTraits>
struct is_default_hook_tag
{ static const bool value = false; };
namespace detail{
template <class T, class BaseHook>
struct concrete_hook_base_value_traits
{
typedef typename BaseHook::hooktags tags;
typedef bhtraits
< T
, typename tags::node_traits
, tags::link_mode
, typename tags::tag
, tags::type> type;
};
template <class BaseHook>
struct concrete_hook_base_value_traits<void, BaseHook>
{
typedef typename BaseHook::hooktags type;
};
template <class T, class AnyToSomeHook_ProtoValueTraits>
struct any_hook_base_value_traits
{
//AnyToSomeHook value_traits derive from a generic_hook
//The generic_hook is configured with any_node_traits
//and AnyToSomeHook::value_traits with the correct
//node traits for the container, so use node_traits
//from AnyToSomeHook_ProtoValueTraits and the rest of
//elements from the hooktags member of the generic_hook
typedef typename AnyToSomeHook_ProtoValueTraits::basic_hook_t basic_hook_t;
typedef typename pointer_rebind
< typename basic_hook_t::hooktags::node_traits::node_ptr
, void>::type void_pointer;
typedef typename AnyToSomeHook_ProtoValueTraits::template
node_traits_from_voidptr<void_pointer>::type node_traits;
typedef bhtraits
< T
, node_traits
, basic_hook_t::hooktags::link_mode
, typename basic_hook_t::hooktags::tag
, basic_hook_t::hooktags::type
> type;
};
template <class AnyToSomeHook_ProtoValueTraits>
struct any_hook_base_value_traits<void, AnyToSomeHook_ProtoValueTraits>
{
typedef typename AnyToSomeHook_ProtoValueTraits::basic_hook_t basic_hook_t;
typedef typename pointer_rebind
< typename basic_hook_t::hooktags::node_traits::node_ptr
, void>::type void_pointer;
struct type
{
typedef typename AnyToSomeHook_ProtoValueTraits::template
node_traits_from_voidptr<void_pointer>::type node_traits;
};
};
template<class MemberHook>
struct get_member_value_traits
{
typedef typename MemberHook::member_value_traits type;
};
BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(internal_any_hook, is_any_hook)
BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(internal_base_hook, hooktags::is_base_hook)
template <class T>
struct internal_member_value_traits
{
template <class U> static one test(...);
template <class U> static two test(typename U::member_value_traits* = 0);
static const bool value = sizeof(test<T>(0)) == sizeof(two);
};
template<class SupposedValueTraits, class T, bool = is_default_hook_tag<SupposedValueTraits>::value>
struct supposed_value_traits;
template<class T, class BaseHook, bool = internal_any_hook_bool_is_true<BaseHook>::value>
struct get_base_value_traits;
template<class SupposedValueTraits, class T, bool = internal_base_hook_bool_is_true<SupposedValueTraits>::value>
struct supposed_base_value_traits;
template<class SupposedValueTraits, bool = internal_member_value_traits<SupposedValueTraits>::value>
struct supposed_member_value_traits;
template<class SupposedValueTraits, bool = internal_any_hook_bool_is_true<SupposedValueTraits>::value>
struct any_or_concrete_value_traits;
//Base any hook
template<class T, class BaseHook>
struct get_base_value_traits<T, BaseHook, true>
: any_hook_base_value_traits<T, BaseHook>
{};
//Non-any base hook
template<class T, class BaseHook>
struct get_base_value_traits<T, BaseHook, false>
: concrete_hook_base_value_traits<T, BaseHook>
{};
//...It's a default hook
template<class SupposedValueTraits, class T>
struct supposed_value_traits<SupposedValueTraits, T, true>
{ typedef typename SupposedValueTraits::template apply<T>::type type; };
//...Not a default hook
template<class SupposedValueTraits, class T>
struct supposed_value_traits<SupposedValueTraits, T, false>
{ typedef SupposedValueTraits type; };
//...It's a base hook
template<class BaseHook, class T>
struct supposed_base_value_traits<BaseHook, T, true>
: get_base_value_traits<T, BaseHook>
{};
//...Not a base hook, try if it's a member or value_traits
template<class SupposedValueTraits, class T>
struct supposed_base_value_traits<SupposedValueTraits, T, false>
: supposed_member_value_traits<SupposedValueTraits>
{};
//...It's a member hook
template<class MemberHook>
struct supposed_member_value_traits<MemberHook, true>
: get_member_value_traits<MemberHook>
{};
//...Not a member hook
template<class SupposedValueTraits>
struct supposed_member_value_traits<SupposedValueTraits, false>
: any_or_concrete_value_traits<SupposedValueTraits>
{};
template<class AnyToSomeHook_ProtoValueTraits>
struct any_or_concrete_value_traits<AnyToSomeHook_ProtoValueTraits, true>
{
//A hook node (non-base, e.g.: member or other value traits
typedef typename AnyToSomeHook_ProtoValueTraits::basic_hook_t basic_hook_t;
typedef typename pointer_rebind
<typename basic_hook_t::node_ptr, void>::type void_pointer;
typedef typename AnyToSomeHook_ProtoValueTraits::template
node_traits_from_voidptr<void_pointer>::type any_node_traits;
struct type : basic_hook_t
{
typedef any_node_traits node_traits;
};
};
template<class SupposedValueTraits>
struct any_or_concrete_value_traits<SupposedValueTraits, false>
{
typedef SupposedValueTraits type;
};
////////////////////////////////////////
// get_value_traits / get_node_traits
////////////////////////////////////////
template<class T, class SupposedValueTraits>
struct get_value_traits
: supposed_base_value_traits<typename supposed_value_traits<SupposedValueTraits, T>::type, T>
{};
template<class SupposedValueTraits>
struct get_node_traits
{
typedef typename get_value_traits<void, SupposedValueTraits>::type::node_traits type;
};
} //namespace detail{
#endif //BOOST_INTRUSIVE_DOXYGEN_INVOKED
} //namespace intrusive {
} //namespace boost {
#include <boost/intrusive/detail/config_end.hpp>
#endif //#ifndef BOOST_INTRUSIVE_DETAIL_GET_VALUE_TRAITS_HPP