859 lines
26 KiB
C++
859 lines
26 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2006-2012
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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_UTILITIES_HPP
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#define BOOST_INTRUSIVE_DETAIL_UTILITIES_HPP
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#include <boost/intrusive/detail/config_begin.hpp>
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#include <boost/intrusive/pointer_traits.hpp>
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#include <boost/intrusive/detail/parent_from_member.hpp>
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#include <boost/intrusive/detail/ebo_functor_holder.hpp>
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#include <boost/intrusive/link_mode.hpp>
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#include <boost/intrusive/detail/mpl.hpp>
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#include <boost/intrusive/detail/assert.hpp>
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#include <boost/intrusive/detail/is_stateful_value_traits.hpp>
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#include <boost/intrusive/pointer_traits.hpp>
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#include <boost/cstdint.hpp>
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#include <cstddef>
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#include <climits>
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#include <iterator>
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#include <boost/cstdint.hpp>
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#include <boost/static_assert.hpp>
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#include <boost/detail/no_exceptions_support.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 T>
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struct internal_member_value_traits
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{
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template <class U> static detail::one test(...);
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template <class U> static detail::two test(typename U::member_value_traits* = 0);
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static const bool value = sizeof(test<T>(0)) == sizeof(detail::two);
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};
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#define BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(TRAITS_PREFIX, TYPEDEF_TO_FIND) \
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template <class T>\
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struct TRAITS_PREFIX##_bool\
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{\
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template<bool Add>\
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struct two_or_three {one _[2 + Add];};\
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template <class U> static one test(...);\
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template <class U> static two_or_three<U::TYPEDEF_TO_FIND> test (int);\
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static const std::size_t value = sizeof(test<T>(0));\
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};\
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\
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template <class T>\
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struct TRAITS_PREFIX##_bool_is_true\
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{\
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static const bool value = TRAITS_PREFIX##_bool<T>::value > sizeof(one)*2;\
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};\
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//
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BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(internal_base_hook, boost_intrusive_tags::is_base_hook)
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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(external_value_traits, external_value_traits)
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BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(external_bucket_traits, external_bucket_traits)
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BOOST_INTRUSIVE_INTERNAL_STATIC_BOOL_IS_TRUE(resizable, resizable)
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template<class Node, class Tag, link_mode_type LinkMode, int>
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struct node_holder
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: public Node
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{};
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template <class T>
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inline T* to_raw_pointer(T* p)
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{ return p; }
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template <class Pointer>
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inline typename boost::intrusive::pointer_traits<Pointer>::element_type*
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to_raw_pointer(const Pointer &p)
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{ return boost::intrusive::detail::to_raw_pointer(p.operator->()); }
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//This functor compares a stored value
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//and the one passed as an argument
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template<class ConstReference>
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class equal_to_value
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{
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ConstReference t_;
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public:
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equal_to_value(ConstReference t)
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: t_(t)
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{}
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bool operator()(ConstReference t)const
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{ return t_ == t; }
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};
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class null_disposer
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{
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public:
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template <class Pointer>
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void operator()(Pointer)
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{}
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};
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template<class NodeAlgorithms>
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class init_disposer
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{
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typedef typename NodeAlgorithms::node_ptr node_ptr;
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public:
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void operator()(const node_ptr & p)
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{ NodeAlgorithms::init(p); }
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};
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template<bool ConstantSize, class SizeType>
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struct size_holder
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{
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static const bool constant_time_size = ConstantSize;
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typedef SizeType size_type;
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SizeType get_size() const
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{ return size_; }
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void set_size(SizeType size)
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{ size_ = size; }
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void decrement()
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{ --size_; }
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void increment()
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{ ++size_; }
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void increase(SizeType n)
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{ size_ += n; }
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void decrease(SizeType n)
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{ size_ -= n; }
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SizeType size_;
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};
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template<class SizeType>
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struct size_holder<false, SizeType>
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{
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static const bool constant_time_size = false;
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typedef SizeType size_type;
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size_type get_size() const
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{ return 0; }
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void set_size(size_type)
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{}
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void decrement()
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{}
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void increment()
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{}
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void increase(SizeType)
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{}
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void decrease(SizeType)
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{}
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};
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template<class KeyValueCompare, class Container>
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struct key_nodeptr_comp
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: private detail::ebo_functor_holder<KeyValueCompare>
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{
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typedef typename Container::real_value_traits real_value_traits;
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typedef typename Container::value_type value_type;
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typedef typename real_value_traits::node_ptr node_ptr;
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typedef typename real_value_traits::const_node_ptr const_node_ptr;
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typedef detail::ebo_functor_holder<KeyValueCompare> base_t;
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key_nodeptr_comp(KeyValueCompare kcomp, const Container *cont)
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: base_t(kcomp), cont_(cont)
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{}
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template<class T>
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struct is_node_ptr
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{
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static const bool value = is_same<T, const_node_ptr>::value || is_same<T, node_ptr>::value;
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};
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template<class T>
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const value_type & key_forward
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(const T &node, typename enable_if_c<is_node_ptr<T>::value>::type * = 0) const
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{ return *cont_->get_real_value_traits().to_value_ptr(node); }
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template<class T>
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const T & key_forward(const T &key, typename enable_if_c<!is_node_ptr<T>::value>::type* = 0) const
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{ return key; }
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template<class KeyType, class KeyType2>
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bool operator()(const KeyType &key1, const KeyType2 &key2) const
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{ return base_t::get()(this->key_forward(key1), this->key_forward(key2)); }
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const Container *cont_;
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};
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template<class F, class Container>
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struct node_cloner
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: private detail::ebo_functor_holder<F>
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{
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typedef typename Container::real_value_traits real_value_traits;
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typedef typename Container::node_algorithms node_algorithms;
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typedef typename real_value_traits::value_type value_type;
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typedef typename real_value_traits::pointer pointer;
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typedef typename real_value_traits::node_traits::node node;
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typedef typename real_value_traits::node_ptr node_ptr;
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typedef typename real_value_traits::const_node_ptr const_node_ptr;
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typedef detail::ebo_functor_holder<F> base_t;
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enum { safemode_or_autounlink =
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(int)real_value_traits::link_mode == (int)auto_unlink ||
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(int)real_value_traits::link_mode == (int)safe_link };
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node_cloner(F f, const Container *cont)
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: base_t(f), cont_(cont)
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{}
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node_ptr operator()(const node_ptr & p)
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{ return this->operator()(*p); }
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node_ptr operator()(const node &to_clone)
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{
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const value_type &v =
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*cont_->get_real_value_traits().to_value_ptr
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(pointer_traits<const_node_ptr>::pointer_to(to_clone));
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node_ptr n = cont_->get_real_value_traits().to_node_ptr(*base_t::get()(v));
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//Cloned node must be in default mode if the linking mode requires it
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if(safemode_or_autounlink)
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BOOST_INTRUSIVE_SAFE_HOOK_DEFAULT_ASSERT(node_algorithms::unique(n));
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return n;
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}
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const Container *cont_;
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};
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template<class F, class Container>
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struct node_disposer
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: private detail::ebo_functor_holder<F>
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{
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typedef typename Container::real_value_traits real_value_traits;
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typedef typename real_value_traits::node_ptr node_ptr;
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typedef detail::ebo_functor_holder<F> base_t;
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typedef typename Container::node_algorithms node_algorithms;
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enum { safemode_or_autounlink =
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(int)real_value_traits::link_mode == (int)auto_unlink ||
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(int)real_value_traits::link_mode == (int)safe_link };
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node_disposer(F f, const Container *cont)
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: base_t(f), cont_(cont)
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{}
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void operator()(const node_ptr & p)
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{
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if(safemode_or_autounlink)
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node_algorithms::init(p);
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base_t::get()(cont_->get_real_value_traits().to_value_ptr(p));
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}
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const Container *cont_;
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};
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struct dummy_constptr
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{
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dummy_constptr(const void *)
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{}
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const void *get_ptr() const
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{ return 0; }
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};
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template<class VoidPointer>
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struct constptr
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{
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typedef typename boost::intrusive::pointer_traits<VoidPointer>::
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template rebind_pointer<const void>::type ConstVoidPtr;
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constptr(const void *ptr)
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: const_void_ptr_(ptr)
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{}
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const void *get_ptr() const
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{ return boost::intrusive::detail::to_raw_pointer(const_void_ptr_); }
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ConstVoidPtr const_void_ptr_;
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};
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template <class VoidPointer, bool store_ptr>
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struct select_constptr
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{
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typedef typename detail::if_c
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< store_ptr
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, constptr<VoidPointer>
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, dummy_constptr
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>::type type;
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};
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template<class T, bool Add>
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struct add_const_if_c
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{
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typedef typename detail::if_c
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< Add
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, typename detail::add_const<T>::type
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, T
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>::type type;
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};
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template <link_mode_type LinkMode>
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struct link_dispatch
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{};
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template<class Hook>
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void destructor_impl(Hook &hook, detail::link_dispatch<safe_link>)
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{ //If this assertion raises, you might have destroyed an object
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//while it was still inserted in a container that is alive.
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//If so, remove the object from the container before destroying it.
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(void)hook; BOOST_INTRUSIVE_SAFE_HOOK_DESTRUCTOR_ASSERT(!hook.is_linked());
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}
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template<class Hook>
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void destructor_impl(Hook &hook, detail::link_dispatch<auto_unlink>)
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{ hook.unlink(); }
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template<class Hook>
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void destructor_impl(Hook &, detail::link_dispatch<normal_link>)
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{}
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template<class T, class NodeTraits, link_mode_type LinkMode, class Tag, int HookType>
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struct base_hook_traits
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{
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public:
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typedef detail::node_holder
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<typename NodeTraits::node, Tag, LinkMode, HookType> node_holder;
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typedef typename NodeTraits::node node;
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typedef NodeTraits node_traits;
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typedef T value_type;
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typedef typename node_traits::node_ptr node_ptr;
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typedef typename node_traits::const_node_ptr const_node_ptr;
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typedef typename pointer_traits<node_ptr>::
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template rebind_pointer<T>::type pointer;
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typedef typename pointer_traits<node_ptr>::
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template rebind_pointer<const T>::type const_pointer;
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//typedef typename pointer_traits<pointer>::reference reference;
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//typedef typename pointer_traits<const_pointer>::reference const_reference;
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typedef T & reference;
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typedef const T & const_reference;
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typedef node_holder & node_holder_reference;
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typedef const node_holder & const_node_holder_reference;
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typedef node& node_reference;
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typedef const node & const_node_reference;
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static const link_mode_type link_mode = LinkMode;
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static pointer to_value_ptr(const node_ptr & n)
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{
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return pointer_traits<pointer>::pointer_to
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(static_cast<reference>(static_cast<node_holder_reference>(*n)));
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}
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static const_pointer to_value_ptr(const const_node_ptr & n)
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{
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return pointer_traits<const_pointer>::pointer_to
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(static_cast<const_reference>(static_cast<const_node_holder_reference>(*n)));
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}
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static node_ptr to_node_ptr(reference value)
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{
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return pointer_traits<node_ptr>::pointer_to
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(static_cast<node_reference>(static_cast<node_holder_reference>(value)));
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}
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static const_node_ptr to_node_ptr(const_reference value)
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{
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return pointer_traits<const_node_ptr>::pointer_to
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(static_cast<const_node_reference>(static_cast<const_node_holder_reference>(value)));
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}
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};
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template<class T, class Hook, Hook T::* P>
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struct member_hook_traits
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{
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public:
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typedef Hook hook_type;
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typedef typename hook_type::boost_intrusive_tags::node_traits node_traits;
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typedef typename node_traits::node node;
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typedef T value_type;
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typedef typename node_traits::node_ptr node_ptr;
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typedef typename node_traits::const_node_ptr const_node_ptr;
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typedef typename pointer_traits<node_ptr>::
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template rebind_pointer<T>::type pointer;
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typedef typename pointer_traits<node_ptr>::
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template rebind_pointer<const T>::type const_pointer;
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typedef T & reference;
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typedef const T & const_reference;
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typedef node& node_reference;
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typedef const node & const_node_reference;
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typedef hook_type& hook_reference;
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typedef const hook_type & const_hook_reference;
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static const link_mode_type link_mode = Hook::boost_intrusive_tags::link_mode;
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static node_ptr to_node_ptr(reference value)
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{
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return pointer_traits<node_ptr>::pointer_to
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(static_cast<node_reference>(static_cast<hook_reference>(value.*P)));
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}
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static const_node_ptr to_node_ptr(const_reference value)
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{
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return pointer_traits<const_node_ptr>::pointer_to
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(static_cast<const_node_reference>(static_cast<const_hook_reference>(value.*P)));
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}
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static pointer to_value_ptr(const node_ptr & n)
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{
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return pointer_traits<pointer>::pointer_to
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(*detail::parent_from_member<T, Hook>
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(static_cast<Hook*>(boost::intrusive::detail::to_raw_pointer(n)), P));
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}
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static const_pointer to_value_ptr(const const_node_ptr & n)
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{
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return pointer_traits<const_pointer>::pointer_to
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(*detail::parent_from_member<T, Hook>
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(static_cast<const Hook*>(boost::intrusive::detail::to_raw_pointer(n)), P));
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}
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};
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template<class Functor>
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struct function_hook_traits
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{
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public:
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typedef typename Functor::hook_type hook_type;
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typedef typename Functor::hook_ptr hook_ptr;
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typedef typename Functor::const_hook_ptr const_hook_ptr;
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typedef typename hook_type::boost_intrusive_tags::node_traits node_traits;
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typedef typename node_traits::node node;
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typedef typename Functor::value_type value_type;
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typedef typename node_traits::node_ptr node_ptr;
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typedef typename node_traits::const_node_ptr const_node_ptr;
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typedef typename pointer_traits<node_ptr>::
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template rebind_pointer<value_type>::type pointer;
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typedef typename pointer_traits<node_ptr>::
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template rebind_pointer<const value_type>::type const_pointer;
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typedef value_type & reference;
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typedef const value_type & const_reference;
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static const link_mode_type link_mode = hook_type::boost_intrusive_tags::link_mode;
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static node_ptr to_node_ptr(reference value)
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{ return static_cast<node*>(boost::intrusive::detail::to_raw_pointer(Functor::to_hook_ptr(value))); }
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static const_node_ptr to_node_ptr(const_reference value)
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{ return static_cast<const node*>(boost::intrusive::detail::to_raw_pointer(Functor::to_hook_ptr(value))); }
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static pointer to_value_ptr(const node_ptr & n)
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{ return Functor::to_value_ptr(to_hook_ptr(n)); }
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static const_pointer to_value_ptr(const const_node_ptr & n)
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{ return Functor::to_value_ptr(to_hook_ptr(n)); }
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private:
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static hook_ptr to_hook_ptr(const node_ptr & n)
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{ return hook_ptr(&*static_cast<hook_type*>(&*n)); }
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static const_hook_ptr to_hook_ptr(const const_node_ptr & n)
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{ return const_hook_ptr(&*static_cast<const hook_type*>(&*n)); }
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};
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//This function uses binary search to discover the
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//highest set bit of the integer
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inline std::size_t floor_log2 (std::size_t x)
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{
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const std::size_t Bits = sizeof(std::size_t)*CHAR_BIT;
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const bool Size_t_Bits_Power_2= !(Bits & (Bits-1));
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BOOST_STATIC_ASSERT(Size_t_Bits_Power_2);
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std::size_t n = x;
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std::size_t log2 = 0;
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for(std::size_t shift = Bits >> 1; shift; shift >>= 1){
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std::size_t tmp = n >> shift;
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if (tmp)
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log2 += shift, n = tmp;
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}
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return log2;
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}
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inline float fast_log2 (float val)
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{
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union caster_t
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{
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boost::uint32_t x;
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float val;
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} caster;
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caster.val = val;
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boost::uint32_t x = caster.x;
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const int log_2 = (int)(((x >> 23) & 255) - 128);
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x &= ~(255 << 23);
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x += 127 << 23;
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caster.x = x;
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val = caster.val;
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val = ((-1.0f/3.f) * val + 2.f) * val - (2.0f/3.f);
|
|
|
|
return (val + log_2);
|
|
}
|
|
|
|
inline std::size_t ceil_log2 (std::size_t x)
|
|
{
|
|
return ((x & (x-1))!= 0) + floor_log2(x);
|
|
}
|
|
|
|
template<class SizeType, std::size_t N>
|
|
struct numbits_eq
|
|
{
|
|
static const bool value = sizeof(SizeType)*CHAR_BIT == N;
|
|
};
|
|
|
|
template<class SizeType, class Enabler = void >
|
|
struct sqrt2_pow_max;
|
|
|
|
template <class SizeType>
|
|
struct sqrt2_pow_max<SizeType, typename enable_if< numbits_eq<SizeType, 32> >::type>
|
|
{
|
|
static const boost::uint32_t value = 0xb504f334;
|
|
static const std::size_t pow = 31;
|
|
};
|
|
|
|
template <class SizeType>
|
|
struct sqrt2_pow_max<SizeType, typename enable_if< numbits_eq<SizeType, 64> >::type>
|
|
{
|
|
static const boost::uint64_t value = 0xb504f333f9de6484ull;
|
|
static const std::size_t pow = 63;
|
|
};
|
|
|
|
// Returns floor(pow(sqrt(2), x * 2 + 1)).
|
|
// Defined for X from 0 up to the number of bits in size_t minus 1.
|
|
inline std::size_t sqrt2_pow_2xplus1 (std::size_t x)
|
|
{
|
|
const std::size_t value = (std::size_t)sqrt2_pow_max<std::size_t>::value;
|
|
const std::size_t pow = (std::size_t)sqrt2_pow_max<std::size_t>::pow;
|
|
return (value >> (pow - x)) + 1;
|
|
}
|
|
|
|
template<class Container, class Disposer>
|
|
class exception_disposer
|
|
{
|
|
Container *cont_;
|
|
Disposer &disp_;
|
|
|
|
exception_disposer(const exception_disposer&);
|
|
exception_disposer &operator=(const exception_disposer&);
|
|
|
|
public:
|
|
exception_disposer(Container &cont, Disposer &disp)
|
|
: cont_(&cont), disp_(disp)
|
|
{}
|
|
|
|
void release()
|
|
{ cont_ = 0; }
|
|
|
|
~exception_disposer()
|
|
{
|
|
if(cont_){
|
|
cont_->clear_and_dispose(disp_);
|
|
}
|
|
}
|
|
};
|
|
|
|
template<class Container, class Disposer, class SizeType>
|
|
class exception_array_disposer
|
|
{
|
|
Container *cont_;
|
|
Disposer &disp_;
|
|
SizeType &constructed_;
|
|
|
|
exception_array_disposer(const exception_array_disposer&);
|
|
exception_array_disposer &operator=(const exception_array_disposer&);
|
|
|
|
public:
|
|
|
|
exception_array_disposer
|
|
(Container &cont, Disposer &disp, SizeType &constructed)
|
|
: cont_(&cont), disp_(disp), constructed_(constructed)
|
|
{}
|
|
|
|
void release()
|
|
{ cont_ = 0; }
|
|
|
|
~exception_array_disposer()
|
|
{
|
|
SizeType n = constructed_;
|
|
if(cont_){
|
|
while(n--){
|
|
cont_[n].clear_and_dispose(disp_);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
template<class ValueTraits, bool ExternalValueTraits>
|
|
struct store_cont_ptr_on_it_impl
|
|
{
|
|
static const bool value = is_stateful_value_traits<ValueTraits>::value;
|
|
};
|
|
|
|
template<class ValueTraits>
|
|
struct store_cont_ptr_on_it_impl<ValueTraits, true>
|
|
{
|
|
static const bool value = true;
|
|
};
|
|
|
|
template <class Container>
|
|
struct store_cont_ptr_on_it
|
|
{
|
|
typedef typename Container::value_traits value_traits;
|
|
static const bool value = store_cont_ptr_on_it_impl
|
|
<value_traits, external_value_traits_bool_is_true<value_traits>::value>::value;
|
|
};
|
|
|
|
template<class Container, bool IsConst>
|
|
struct node_to_value
|
|
: public detail::select_constptr
|
|
< typename pointer_traits
|
|
<typename Container::pointer>::template rebind_pointer<void>::type
|
|
, detail::store_cont_ptr_on_it<Container>::value
|
|
>::type
|
|
{
|
|
static const bool store_container_ptr =
|
|
detail::store_cont_ptr_on_it<Container>::value;
|
|
|
|
typedef typename Container::real_value_traits real_value_traits;
|
|
typedef typename real_value_traits::value_type value_type;
|
|
typedef typename detail::select_constptr
|
|
< typename pointer_traits
|
|
<typename Container::pointer>::template rebind_pointer<void>::type
|
|
, store_container_ptr >::type Base;
|
|
typedef typename real_value_traits::node_traits::node node;
|
|
typedef typename detail::add_const_if_c
|
|
<value_type, IsConst>::type vtype;
|
|
typedef typename detail::add_const_if_c
|
|
<node, IsConst>::type ntype;
|
|
typedef typename pointer_traits
|
|
<typename Container::pointer>::template rebind_pointer<ntype>::type npointer;
|
|
|
|
node_to_value(const Container *cont)
|
|
: Base(cont)
|
|
{}
|
|
|
|
typedef vtype & result_type;
|
|
typedef ntype & first_argument_type;
|
|
|
|
const Container *get_container() const
|
|
{
|
|
if(store_container_ptr)
|
|
return static_cast<const Container*>(Base::get_ptr());
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
const real_value_traits *get_real_value_traits() const
|
|
{
|
|
if(store_container_ptr)
|
|
return &this->get_container()->get_real_value_traits();
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
result_type operator()(first_argument_type arg) const
|
|
{
|
|
return *(this->get_real_value_traits()->to_value_ptr
|
|
(pointer_traits<npointer>::pointer_to(arg)));
|
|
}
|
|
};
|
|
|
|
//This is not standard, but should work with all compilers
|
|
union max_align
|
|
{
|
|
char char_;
|
|
short short_;
|
|
int int_;
|
|
long long_;
|
|
#ifdef BOOST_HAS_LONG_LONG
|
|
long long long_long_;
|
|
#endif
|
|
float float_;
|
|
double double_;
|
|
long double long_double_;
|
|
void * void_ptr_;
|
|
};
|
|
|
|
template<class T, std::size_t N>
|
|
class array_initializer
|
|
{
|
|
public:
|
|
template<class CommonInitializer>
|
|
array_initializer(const CommonInitializer &init)
|
|
{
|
|
char *init_buf = (char*)rawbuf;
|
|
std::size_t i = 0;
|
|
BOOST_TRY{
|
|
for(; i != N; ++i){
|
|
new(init_buf)T(init);
|
|
init_buf += sizeof(T);
|
|
}
|
|
}
|
|
BOOST_CATCH(...){
|
|
while(i--){
|
|
init_buf -= sizeof(T);
|
|
((T*)init_buf)->~T();
|
|
}
|
|
BOOST_RETHROW;
|
|
}
|
|
BOOST_CATCH_END
|
|
}
|
|
|
|
operator T* ()
|
|
{ return (T*)(rawbuf); }
|
|
|
|
operator const T*() const
|
|
{ return (const T*)(rawbuf); }
|
|
|
|
~array_initializer()
|
|
{
|
|
char *init_buf = (char*)rawbuf + N*sizeof(T);
|
|
for(std::size_t i = 0; i != N; ++i){
|
|
init_buf -= sizeof(T);
|
|
((T*)init_buf)->~T();
|
|
}
|
|
}
|
|
|
|
private:
|
|
detail::max_align rawbuf[(N*sizeof(T)-1)/sizeof(detail::max_align)+1];
|
|
};
|
|
|
|
|
|
|
|
|
|
template<class It>
|
|
class reverse_iterator
|
|
: public std::iterator<
|
|
typename std::iterator_traits<It>::iterator_category,
|
|
typename std::iterator_traits<It>::value_type,
|
|
typename std::iterator_traits<It>::difference_type,
|
|
typename std::iterator_traits<It>::pointer,
|
|
typename std::iterator_traits<It>::reference>
|
|
{
|
|
public:
|
|
typedef typename std::iterator_traits<It>::pointer pointer;
|
|
typedef typename std::iterator_traits<It>::reference reference;
|
|
typedef typename std::iterator_traits<It>::difference_type difference_type;
|
|
typedef It iterator_type;
|
|
|
|
reverse_iterator(){}
|
|
|
|
explicit reverse_iterator(It r)
|
|
: m_current(r)
|
|
{}
|
|
|
|
template<class OtherIt>
|
|
reverse_iterator(const reverse_iterator<OtherIt>& r)
|
|
: m_current(r.base())
|
|
{}
|
|
|
|
It base() const
|
|
{ return m_current; }
|
|
|
|
reference operator*() const
|
|
{ It temp(m_current); --temp; return *temp; }
|
|
|
|
pointer operator->() const
|
|
{ It temp(m_current); --temp; return temp.operator->(); }
|
|
|
|
reference operator[](difference_type off) const
|
|
{ return this->m_current[-off]; }
|
|
|
|
reverse_iterator& operator++()
|
|
{ --m_current; return *this; }
|
|
|
|
reverse_iterator operator++(int)
|
|
{
|
|
reverse_iterator temp = *this;
|
|
--m_current;
|
|
return temp;
|
|
}
|
|
|
|
reverse_iterator& operator--()
|
|
{
|
|
++m_current;
|
|
return *this;
|
|
}
|
|
|
|
reverse_iterator operator--(int)
|
|
{
|
|
reverse_iterator temp(*this);
|
|
++m_current;
|
|
return temp;
|
|
}
|
|
|
|
friend bool operator==(const reverse_iterator& l, const reverse_iterator& r)
|
|
{ return l.m_current == r.m_current; }
|
|
|
|
friend bool operator!=(const reverse_iterator& l, const reverse_iterator& r)
|
|
{ return l.m_current != r.m_current; }
|
|
|
|
friend bool operator<(const reverse_iterator& l, const reverse_iterator& r)
|
|
{ return l.m_current < r.m_current; }
|
|
|
|
friend bool operator<=(const reverse_iterator& l, const reverse_iterator& r)
|
|
{ return l.m_current <= r.m_current; }
|
|
|
|
friend bool operator>(const reverse_iterator& l, const reverse_iterator& r)
|
|
{ return l.m_current > r.m_current; }
|
|
|
|
friend bool operator>=(const reverse_iterator& l, const reverse_iterator& r)
|
|
{ return l.m_current >= r.m_current; }
|
|
|
|
reverse_iterator& operator+=(difference_type off)
|
|
{ m_current -= off; return *this; }
|
|
|
|
friend reverse_iterator operator+(const reverse_iterator & l, difference_type off)
|
|
{
|
|
reverse_iterator tmp(l.m_current);
|
|
tmp.m_current -= off;
|
|
return tmp;
|
|
}
|
|
|
|
reverse_iterator& operator-=(difference_type off)
|
|
{ m_current += off; return *this; }
|
|
|
|
friend reverse_iterator operator-(const reverse_iterator & l, difference_type off)
|
|
{
|
|
reverse_iterator tmp(l.m_current);
|
|
tmp.m_current += off;
|
|
return tmp;
|
|
}
|
|
|
|
friend difference_type operator-(const reverse_iterator& l, const reverse_iterator& r)
|
|
{ return r.m_current - l.m_current; }
|
|
|
|
private:
|
|
It m_current; // the wrapped iterator
|
|
};
|
|
|
|
} //namespace detail
|
|
} //namespace intrusive
|
|
} //namespace boost
|
|
|
|
#include <boost/intrusive/detail/config_end.hpp>
|
|
|
|
#endif //BOOST_INTRUSIVE_DETAIL_UTILITIES_HPP
|