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126 lines
4.8 KiB
C++
126 lines
4.8 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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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_KEY_NODEPTR_COMP_HPP
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#define BOOST_INTRUSIVE_DETAIL_KEY_NODEPTR_COMP_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/mpl.hpp>
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#include <boost/intrusive/detail/ebo_functor_holder.hpp>
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#include <boost/intrusive/detail/tree_value_compare.hpp>
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namespace boost {
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namespace intrusive {
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namespace detail {
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template < class KeyTypeKeyCompare
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, class ValueTraits
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, class KeyOfValue
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>
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struct key_nodeptr_comp_types
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{
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typedef ValueTraits value_traits;
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typedef typename value_traits::value_type value_type;
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typedef typename value_traits::node_ptr node_ptr;
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typedef typename value_traits::const_node_ptr const_node_ptr;
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typedef typename detail::if_c
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< detail::is_same<KeyOfValue, void>::value
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, detail::identity<value_type>
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, KeyOfValue
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>::type key_of_value;
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typedef tree_value_compare
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<typename ValueTraits::pointer, KeyTypeKeyCompare, key_of_value> base_t;
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};
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//This function object transforms a key comparison type to
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//a function that can compare nodes or nodes with nodes or keys.
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template < class KeyTypeKeyCompare
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, class ValueTraits
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, class KeyOfValue = void
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>
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struct key_nodeptr_comp
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//Use public inheritance to avoid MSVC bugs with closures
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: public key_nodeptr_comp_types<KeyTypeKeyCompare, ValueTraits, KeyOfValue>::base_t
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{
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private:
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struct sfinae_type;
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public:
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typedef key_nodeptr_comp_types<KeyTypeKeyCompare, ValueTraits, KeyOfValue> types_t;
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typedef typename types_t::value_traits value_traits;
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typedef typename types_t::value_type value_type;
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typedef typename types_t::node_ptr node_ptr;
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typedef typename types_t::const_node_ptr const_node_ptr;
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typedef typename types_t::base_t base_t;
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typedef typename types_t::key_of_value key_of_value;
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template <class P1>
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struct is_same_or_nodeptr_convertible
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{
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static const bool same_type = is_same<P1,const_node_ptr>::value || is_same<P1,node_ptr>::value;
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static const bool value = same_type || is_convertible<P1, const_node_ptr>::value;
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};
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BOOST_INTRUSIVE_FORCEINLINE base_t base() const
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{ return static_cast<const base_t&>(*this); }
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BOOST_INTRUSIVE_FORCEINLINE key_nodeptr_comp(KeyTypeKeyCompare kcomp, const ValueTraits *traits)
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: base_t(kcomp), traits_(traits)
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{}
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//pred(pnode)
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template<class T1>
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BOOST_INTRUSIVE_FORCEINLINE bool operator()(const T1 &t1, typename enable_if_c< is_same_or_nodeptr_convertible<T1>::value, sfinae_type* >::type = 0) const
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{ return base().get()(key_of_value()(*traits_->to_value_ptr(t1))); }
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//operator() 2 arg
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//pred(pnode, pnode)
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template<class T1, class T2>
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BOOST_INTRUSIVE_FORCEINLINE bool operator()
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(const T1 &t1, const T2 &t2, typename enable_if_c< is_same_or_nodeptr_convertible<T1>::value && is_same_or_nodeptr_convertible<T2>::value, sfinae_type* >::type = 0) const
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{ return base()(*traits_->to_value_ptr(t1), *traits_->to_value_ptr(t2)); }
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//pred(pnode, key)
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template<class T1, class T2>
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BOOST_INTRUSIVE_FORCEINLINE bool operator()
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(const T1 &t1, const T2 &t2, typename enable_if_c< is_same_or_nodeptr_convertible<T1>::value && !is_same_or_nodeptr_convertible<T2>::value, sfinae_type* >::type = 0) const
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{ return base()(*traits_->to_value_ptr(t1), t2); }
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//pred(key, pnode)
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template<class T1, class T2>
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BOOST_INTRUSIVE_FORCEINLINE bool operator()
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(const T1 &t1, const T2 &t2, typename enable_if_c< !is_same_or_nodeptr_convertible<T1>::value && is_same_or_nodeptr_convertible<T2>::value, sfinae_type* >::type = 0) const
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{ return base()(t1, *traits_->to_value_ptr(t2)); }
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//pred(key, key)
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template<class T1, class T2>
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BOOST_INTRUSIVE_FORCEINLINE bool operator()
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(const T1 &t1, const T2 &t2, typename enable_if_c< !is_same_or_nodeptr_convertible<T1>::value && !is_same_or_nodeptr_convertible<T2>::value, sfinae_type* >::type = 0) const
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{ return base()(t1, t2); }
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const ValueTraits *const traits_;
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};
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} //namespace detail{
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} //namespace intrusive{
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} //namespace boost{
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#endif //BOOST_INTRUSIVE_DETAIL_KEY_NODEPTR_COMP_HPP
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