forked from boostorg/intrusive
Full merge from trunk at revision 41356 of entire boost-root tree.
[SVN r41370]
This commit is contained in:
Beman Dawes
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/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2007
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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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#include <boost/intrusive/list.hpp>
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#include <boost/intrusive/slist.hpp>
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#include <boost/intrusive/rbtree.hpp>
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#include <boost/intrusive/hashtable.hpp>
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#include <boost/pointer_to_other.hpp>
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#include <functional>
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#include <vector>
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using namespace boost::intrusive;
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class MyClass
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{
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public:
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int int_;
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MyClass(int i = 0)
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: int_(i)
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{}
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friend bool operator > (const MyClass &l, const MyClass &r)
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{ return l.int_ > r.int_; }
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friend bool operator == (const MyClass &l, const MyClass &r)
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{ return l.int_ == r.int_; }
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friend std::size_t hash_value(const MyClass &v)
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{ return boost::hash_value(v.int_); }
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};
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const int NumElements = 100;
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template<class NodeTraits>
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struct external_traits
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{
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typedef NodeTraits node_traits;
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typedef typename node_traits::node node;
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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 MyClass value_type;
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typedef typename boost::pointer_to_other
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<node_ptr, MyClass>::type pointer;
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typedef typename boost::pointer_to_other
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<node_ptr, const MyClass>::type const_pointer;
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static const link_mode_type link_mode = normal_link;
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external_traits(pointer values, std::size_t NumElem)
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: values_(values), node_array_(NumElem)
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{}
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node_ptr to_node_ptr (value_type &value)
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{ return (&node_array_[0]) + (&value - values_); }
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const_node_ptr to_node_ptr (const value_type &value) const
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{ return &node_array_[0] + (&value - values_); }
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pointer to_value_ptr(node_ptr n)
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{ return values_ + (n - &node_array_[0]); }
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const_pointer to_value_ptr(const_node_ptr n) const
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{ return values_ + (n - &node_array_[0]); }
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pointer values_;
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std::vector<node> node_array_;
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};
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template<class NodeTraits>
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struct value_traits_proxy;
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template<class T>
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struct traits_holder
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: public T
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{};
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typedef value_traits_proxy<list_node_traits<void*> > list_value_traits_proxy;
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typedef value_traits_proxy<slist_node_traits<void*> > slist_value_traits_proxy;
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typedef value_traits_proxy<rbtree_node_traits<void*> > rbtree_value_traits_proxy;
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typedef value_traits_proxy<traits_holder<slist_node_traits<void*> > > hash_value_traits_proxy;
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struct uset_bucket_traits
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{
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private:
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typedef unordered_bucket<value_traits<external_traits
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<traits_holder<slist_node_traits<void*> > > > >::type bucket_type;
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//Non-copyable
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uset_bucket_traits(const uset_bucket_traits &other);
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uset_bucket_traits & operator=(const uset_bucket_traits &other);
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public:
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static const std::size_t NumBuckets = 100;
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uset_bucket_traits(){}
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bucket_type * bucket_begin() const
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{ return buckets_; }
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std::size_t bucket_count() const
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{ return NumBuckets; }
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mutable bucket_type buckets_[NumBuckets];
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};
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struct bucket_traits_proxy
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{
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static const bool external_bucket_traits = true;
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typedef uset_bucket_traits bucket_traits;
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template<class Container>
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bucket_traits &get_bucket_traits(Container &cont);
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template<class Container>
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const bucket_traits &get_bucket_traits(const Container &cont) const;
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};
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//Define a list that will store MyClass using the external hook
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typedef list<MyClass, value_traits<list_value_traits_proxy> > List;
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//Define a slist that will store MyClass using the external hook
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typedef slist<MyClass, value_traits<slist_value_traits_proxy> > Slist;
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//Define a rbtree that will store MyClass using the external hook
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typedef rbtree< MyClass
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, value_traits<rbtree_value_traits_proxy>
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, compare<std::greater<MyClass> > > Rbtree;
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//Define a hashtable that will store MyClass using the external hook
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typedef hashtable< MyClass
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, value_traits<hash_value_traits_proxy>
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, bucket_traits<bucket_traits_proxy>
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> Hash;
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template<class NodeTraits>
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struct value_traits_proxy
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{
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static const bool external_value_traits = true;
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typedef external_traits<NodeTraits> value_traits;
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template<class Container>
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const value_traits &get_value_traits(const Container &cont) const;
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template<class Container>
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value_traits &get_value_traits(Container &cont);
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};
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struct ContainerHolder
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: public uset_bucket_traits
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, public List
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, public external_traits<list_node_traits<void*> >
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, public Slist
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, public external_traits<slist_node_traits<void*> >
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, public Rbtree
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, public external_traits<rbtree_node_traits<void*> >
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, public Hash
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, public external_traits<traits_holder<slist_node_traits<void*> > >
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{
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static const std::size_t NumBucket = 100;
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ContainerHolder(MyClass *values, std::size_t num_elem)
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: uset_bucket_traits()
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, List()
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, external_traits<list_node_traits<void*> >(values, num_elem)
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, Slist()
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, external_traits<slist_node_traits<void*> >(values, num_elem)
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, Rbtree()
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, external_traits<rbtree_node_traits<void*> >(values, num_elem)
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, Hash(Hash::bucket_traits())
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, external_traits<traits_holder<slist_node_traits<void*> > >(values, num_elem)
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{}
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};
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template<class NodeTraits>
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template<class Container>
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typename value_traits_proxy<NodeTraits>::value_traits &
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value_traits_proxy<NodeTraits>::get_value_traits(Container &cont)
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{ return static_cast<value_traits&>(static_cast<ContainerHolder&>(cont)); }
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template<class NodeTraits>
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template<class Container>
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const typename value_traits_proxy<NodeTraits>::value_traits &
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value_traits_proxy<NodeTraits>::get_value_traits(const Container &cont) const
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{ return static_cast<const value_traits&>(static_cast<const ContainerHolder&>(cont)); }
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template<class Container>
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typename bucket_traits_proxy::bucket_traits &
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bucket_traits_proxy::get_bucket_traits(Container &cont)
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{ return static_cast<bucket_traits&>(static_cast<ContainerHolder&>(cont)); }
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template<class Container>
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const typename bucket_traits_proxy::bucket_traits &
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bucket_traits_proxy::get_bucket_traits(const Container &cont) const
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{ return static_cast<const bucket_traits&>(static_cast<const ContainerHolder&>(cont)); }
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int main()
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{
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MyClass values [NumElements];
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//Create several MyClass objects, each one with a different value
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for(int i = 0; i < NumElements; ++i)
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values[i].int_ = i;
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ContainerHolder cont_holder(values, NumElements);
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List &my_list = static_cast<List &> (cont_holder);
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Slist &my_slist = static_cast<Slist &> (cont_holder);
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Rbtree &my_rbtree = static_cast<Rbtree &> (cont_holder);
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Hash &my_hash = static_cast<Hash &> (cont_holder);
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//Now insert them in containers
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for(MyClass * it(&values[0]), *itend(&values[NumElements])
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; it != itend; ++it){
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my_list.push_front(*it);
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my_slist.push_front(*it);
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my_rbtree.insert_unique(*it);
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my_hash.insert_unique(*it);
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}
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//Now test containers
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{
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List::const_iterator list_it (my_list.cbegin());
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Slist::const_iterator slist_it (my_slist.cbegin());
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Rbtree::const_iterator rbtree_it (my_rbtree.cbegin());
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Hash::const_iterator hash_it (my_hash.cbegin());
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MyClass *it_val(&values[NumElements] - 1), *it_rbeg_val(&values[0]-1);
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//Test inserted objects
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for(; it_val != it_rbeg_val; --it_val, ++list_it, ++slist_it, ++rbtree_it){
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if(&*list_it != &*it_val) return 1;
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if(&*slist_it != &*it_val) return 1;
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if(&*rbtree_it != &*it_val) return 1;
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hash_it = my_hash.find(*it_val);
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if(hash_it == my_hash.cend() || &*hash_it != &*it_val)
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return 1;
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}
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}
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return 0;
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}
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