223 lines
7.1 KiB
Plaintext
223 lines
7.1 KiB
Plaintext
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/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2014-2014
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/intrusive for documentation.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_INTRUSIVE_DETAIL_GET_VALUE_TRAITS_HPP
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#define BOOST_INTRUSIVE_DETAIL_GET_VALUE_TRAITS_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/intrusive/detail/config_begin.hpp>
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#include <boost/intrusive/detail/mpl.hpp>
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#include <boost/intrusive/detail/hook_traits.hpp>
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namespace boost {
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namespace intrusive {
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#ifndef BOOST_INTRUSIVE_DOXYGEN_INVOKED
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template<class SupposedValueTraits>
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struct is_default_hook_tag
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{ static const bool value = false; };
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namespace detail{
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template <class T, class BaseHook>
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struct concrete_hook_base_value_traits
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{
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typedef typename BaseHook::hooktags tags;
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typedef bhtraits
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< T
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, typename tags::node_traits
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, tags::link_mode
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, typename tags::tag
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, tags::type> type;
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};
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template <class BaseHook>
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struct concrete_hook_base_value_traits<void, BaseHook>
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{
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typedef typename BaseHook::hooktags type;
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};
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template <class T, class AnyToSomeHook_ProtoValueTraits>
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struct any_hook_base_value_traits
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{
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//AnyToSomeHook value_traits derive from a generic_hook
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//The generic_hook is configured with any_node_traits
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//and AnyToSomeHook::value_traits with the correct
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//node traits for the container, so use node_traits
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//from AnyToSomeHook_ProtoValueTraits and the rest of
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//elements from the hooktags member of the generic_hook
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typedef typename AnyToSomeHook_ProtoValueTraits::basic_hook_t basic_hook_t;
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typedef typename pointer_rebind
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< typename basic_hook_t::hooktags::node_traits::node_ptr
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, void>::type void_pointer;
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typedef typename AnyToSomeHook_ProtoValueTraits::template
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node_traits_from_voidptr<void_pointer>::type node_traits;
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typedef bhtraits
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< T
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, node_traits
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, basic_hook_t::hooktags::link_mode
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, typename basic_hook_t::hooktags::tag
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, basic_hook_t::hooktags::type
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> type;
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};
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template <class AnyToSomeHook_ProtoValueTraits>
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struct any_hook_base_value_traits<void, AnyToSomeHook_ProtoValueTraits>
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{
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typedef typename AnyToSomeHook_ProtoValueTraits::basic_hook_t basic_hook_t;
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typedef typename pointer_rebind
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< typename basic_hook_t::hooktags::node_traits::node_ptr
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, void>::type void_pointer;
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struct type
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{
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typedef typename AnyToSomeHook_ProtoValueTraits::template
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node_traits_from_voidptr<void_pointer>::type node_traits;
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};
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};
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template<class MemberHook>
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struct get_member_value_traits
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{
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typedef typename MemberHook::member_value_traits type;
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};
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BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(internal_any_hook, is_any_hook)
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BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(internal_base_hook, hooktags::is_base_hook)
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template <class T>
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struct internal_member_value_traits
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{
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template <class U> static yes_type test(...);
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template <class U> static no_type test(typename U::member_value_traits* = 0);
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static const bool value = sizeof(test<T>(0)) == sizeof(no_type);
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};
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template<class SupposedValueTraits, class T, bool = is_default_hook_tag<SupposedValueTraits>::value>
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struct supposed_value_traits;
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template<class T, class BaseHook, bool = internal_any_hook_bool_is_true<BaseHook>::value>
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struct get_base_value_traits;
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template<class SupposedValueTraits, class T, bool = internal_base_hook_bool_is_true<SupposedValueTraits>::value>
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struct supposed_base_value_traits;
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template<class SupposedValueTraits, bool = internal_member_value_traits<SupposedValueTraits>::value>
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struct supposed_member_value_traits;
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template<class SupposedValueTraits, bool = internal_any_hook_bool_is_true<SupposedValueTraits>::value>
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struct any_or_concrete_value_traits;
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//Base any hook
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template<class T, class BaseHook>
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struct get_base_value_traits<T, BaseHook, true>
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: any_hook_base_value_traits<T, BaseHook>
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{};
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//Non-any base hook
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template<class T, class BaseHook>
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struct get_base_value_traits<T, BaseHook, false>
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: concrete_hook_base_value_traits<T, BaseHook>
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{};
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//...It's a default hook
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template<class SupposedValueTraits, class T>
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struct supposed_value_traits<SupposedValueTraits, T, true>
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{ typedef typename SupposedValueTraits::template apply<T>::type type; };
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//...Not a default hook
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template<class SupposedValueTraits, class T>
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struct supposed_value_traits<SupposedValueTraits, T, false>
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{ typedef SupposedValueTraits type; };
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//...It's a base hook
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template<class BaseHook, class T>
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struct supposed_base_value_traits<BaseHook, T, true>
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: get_base_value_traits<T, BaseHook>
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{};
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//...Not a base hook, try if it's a member or value_traits
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template<class SupposedValueTraits, class T>
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struct supposed_base_value_traits<SupposedValueTraits, T, false>
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: supposed_member_value_traits<SupposedValueTraits>
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{};
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//...It's a member hook
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template<class MemberHook>
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struct supposed_member_value_traits<MemberHook, true>
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: get_member_value_traits<MemberHook>
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{};
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//...Not a member hook
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template<class SupposedValueTraits>
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struct supposed_member_value_traits<SupposedValueTraits, false>
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: any_or_concrete_value_traits<SupposedValueTraits>
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{};
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template<class AnyToSomeHook_ProtoValueTraits>
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struct any_or_concrete_value_traits<AnyToSomeHook_ProtoValueTraits, true>
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{
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//A hook node (non-base, e.g.: member or other value traits
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typedef typename AnyToSomeHook_ProtoValueTraits::basic_hook_t basic_hook_t;
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typedef typename pointer_rebind
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<typename basic_hook_t::node_ptr, void>::type void_pointer;
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typedef typename AnyToSomeHook_ProtoValueTraits::template
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node_traits_from_voidptr<void_pointer>::type any_node_traits;
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struct type : basic_hook_t
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{
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typedef any_node_traits node_traits;
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};
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};
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template<class SupposedValueTraits>
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struct any_or_concrete_value_traits<SupposedValueTraits, false>
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{
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typedef SupposedValueTraits type;
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};
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////////////////////////////////////////
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// get_value_traits / get_node_traits
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////////////////////////////////////////
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template<class T, class SupposedValueTraits>
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struct get_value_traits
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: supposed_base_value_traits<typename supposed_value_traits<SupposedValueTraits, T>::type, T>
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{};
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template<class SupposedValueTraits>
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struct get_node_traits
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{
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typedef typename get_value_traits<void, SupposedValueTraits>::type::node_traits type;
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};
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} //namespace detail{
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#endif //BOOST_INTRUSIVE_DOXYGEN_INVOKED
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} //namespace intrusive {
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} //namespace boost {
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#include <boost/intrusive/detail/config_end.hpp>
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#endif //#ifndef BOOST_INTRUSIVE_DETAIL_GET_VALUE_TRAITS_HPP
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