set.hpp

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   //! <b>Effects</b>: inserts each element from the range [i,j) if and only 
   //!   if there is no element with key equivalent to the key of that element.
   //!
   //! <b>Complexity</b>: N log(size()+N) (N is the distance from i to j)
   template <class InputIterator>
   void insert(InputIterator first, InputIterator last) 
   {  m_tree.insert_unique(first, last);  }

   #ifdef BOOST_INTERPROCESS_PERFECT_FORWARDING

   //! <b>Effects</b>:  Inserts an object of type T constructed with
   //!   std::forward<Args>(args)... if and only if there is 
   //!   no element in the container with equivalent value.
   //!   and returns the iterator pointing to the
   //!   newly inserted element. 
   //!
   //! <b>Throws</b>: If memory allocation throws or
   //!   T's in-place constructor throws.
   //!
   //! <b>Complexity</b>: Logarithmic.
   template <class... Args>
   iterator emplace(Args&&... args)
   {  return m_tree.emplace_unique(detail::forward_impl<Args>(args)...); }

   //! <b>Effects</b>:  Inserts an object of type T constructed with
   //!   std::forward<Args>(args)... if and only if there is 
   //!   no element in the container with equivalent value.
   //!   p is a hint pointing to where the insert
   //!   should start to search.
   //!
   //! <b>Returns</b>: An iterator pointing to the element with key equivalent to the key of x.
   //!
   //! <b>Complexity</b>: Logarithmic.
   template <class... Args>
   iterator emplace_hint(const_iterator hint, Args&&... args)
   {  return m_tree.emplace_hint_unique(hint, detail::forward_impl<Args>(args)...); }

   #else //#ifdef BOOST_INTERPROCESS_PERFECT_FORWARDING

   iterator emplace()
   {  return m_tree.emplace_unique(); }

   iterator emplace_hint(const_iterator hint)
   {  return m_tree.emplace_hint_unique(hint); }

   #define BOOST_PP_LOCAL_MACRO(n)                                                                       \
   template<BOOST_PP_ENUM_PARAMS(n, class P)>                                                            \
   iterator emplace(BOOST_PP_ENUM(n, BOOST_INTERPROCESS_PP_PARAM_LIST, _))                               \
   {  return m_tree.emplace_unique(BOOST_PP_ENUM(n, BOOST_INTERPROCESS_PP_PARAM_FORWARD, _)); }          \
                                                                                                         \
   template<BOOST_PP_ENUM_PARAMS(n, class P)>                                                            \
   iterator emplace_hint(const_iterator hint, BOOST_PP_ENUM(n, BOOST_INTERPROCESS_PP_PARAM_LIST, _))     \
   {  return m_tree.emplace_hint_unique(hint, BOOST_PP_ENUM(n, BOOST_INTERPROCESS_PP_PARAM_FORWARD, _));}\
   //!
   #define BOOST_PP_LOCAL_LIMITS (1, BOOST_INTERPROCESS_MAX_CONSTRUCTOR_PARAMETERS)
   #include BOOST_PP_LOCAL_ITERATE()

   #endif   //#ifdef BOOST_INTERPROCESS_PERFECT_FORWARDING

   //! <b>Effects</b>: Erases the element pointed to by p.
   //!
   //! <b>Returns</b>: Returns an iterator pointing to the element immediately
   //!   following q prior to the element being erased. If no such element exists, 
   //!   returns end().
   //!
   //! <b>Complexity</b>: Amortized constant time
   iterator erase(const_iterator p) 
   {  return m_tree.erase(p); }

   //! <b>Effects</b>: Erases all elements in the container with key equivalent to x.
   //!
   //! <b>Returns</b>: Returns the number of erased elements.
   //!
   //! <b>Complexity</b>: log(size()) + count(k)
   size_type erase(const key_type& x) 
   {  return m_tree.erase(x); }

   //! <b>Effects</b>: Erases all the elements in the range [first, last).
   //!
   //! <b>Returns</b>: Returns last.
   //!
   //! <b>Complexity</b>: log(size())+N where N is the distance from first to last.
   iterator erase(const_iterator first, const_iterator last) 
   {  return m_tree.erase(first, last);  }

   //! <b>Effects</b>: erase(a.begin(),a.end()).
   //!
   //! <b>Postcondition</b>: size() == 0.
   //!
   //! <b>Complexity</b>: linear in size().
   void clear() 
   { m_tree.clear(); }

   //! <b>Returns</b>: An iterator pointing to an element with the key
   //!   equivalent to x, or end() if such an element is not found.
   //!
   //! <b>Complexity</b>: Logarithmic.
   iterator find(const key_type& x) 
   { return m_tree.find(x); }

   //! <b>Returns</b>: A const_iterator pointing to an element with the key
   //!   equivalent to x, or end() if such an element is not found.
   //!
   //! <b>Complexity</b>: Logarithmic.
   const_iterator find(const key_type& x) const 
   { return m_tree.find(x); }

   //! <b>Returns</b>: The number of elements with key equivalent to x.
   //!
   //! <b>Complexity</b>: log(size())+count(k)
   size_type count(const key_type& x) const 
   {  return m_tree.find(x) == m_tree.end() ? 0 : 1;  }

   //! <b>Returns</b>: An iterator pointing to the first element with key not less
   //!   than k, or a.end() if such an element is not found.
   //!
   //! <b>Complexity</b>: Logarithmic
   iterator lower_bound(const key_type& x) 
   {  return m_tree.lower_bound(x); }

   //! <b>Returns</b>: A const iterator pointing to the first element with key not
   //!   less than k, or a.end() if such an element is not found.
   //!
   //! <b>Complexity</b>: Logarithmic
   const_iterator lower_bound(const key_type& x) const 
   {  return m_tree.lower_bound(x); }

   //! <b>Returns</b>: An iterator pointing to the first element with key not less
   //!   than x, or end() if such an element is not found.
   //!
   //! <b>Complexity</b>: Logarithmic
   iterator upper_bound(const key_type& x)
   {  return m_tree.upper_bound(x);    }

   //! <b>Returns</b>: A const iterator pointing to the first element with key not
   //!   less than x, or end() if such an element is not found.
   //!
   //! <b>Complexity</b>: Logarithmic
   const_iterator upper_bound(const key_type& x) const 
   {  return m_tree.upper_bound(x);    }

   //! <b>Effects</b>: Equivalent to std::make_pair(this->lower_bound(k), this->upper_bound(k)).
   //!
   //! <b>Complexity</b>: Logarithmic
   std::pair<iterator,iterator> 
      equal_range(const key_type& x) 
   {  return m_tree.equal_range(x); }

   //! <b>Effects</b>: Equivalent to std::make_pair(this->lower_bound(k), this->upper_bound(k)).
   //!
   //! <b>Complexity</b>: Logarithmic
   std::pair<const_iterator, const_iterator> 
      equal_range(const key_type& x) const 
   {  return m_tree.equal_range(x); }

   /// @cond
   template <class K1, class C1, class A1>
   friend bool operator== (const set<K1,C1,A1>&, const set<K1,C1,A1>&);

   template <class K1, class C1, class A1>
   friend bool operator< (const set<K1,C1,A1>&, const set<K1,C1,A1>&);
   /// @endcond
};

template <class T, class Pred, class Alloc>
inline bool operator==(const set<T,Pred,Alloc>& x, 
                       const set<T,Pred,Alloc>& y) 
{  return x.m_tree == y.m_tree;  }

template <class T, class Pred, class Alloc>
inline bool operator<(const set<T,Pred,Alloc>& x, 
                      const set<T,Pred,Alloc>& y) 
{  return x.m_tree < y.m_tree;   }

template <class T, class Pred, class Alloc>
inline bool operator!=(const set<T,Pred,Alloc>& x, 
                       const set<T,Pred,Alloc>& y) 
{  return !(x == y);   }

template <class T, class Pred, class Alloc>
inline bool operator>(const set<T,Pred,Alloc>& x, 
                      const set<T,Pred,Alloc>& y) 
{  return y < x; }

template <class T, class Pred, class Alloc>
inline bool operator<=(const set<T,Pred,Alloc>& x, 
                       const set<T,Pred,Alloc>& y) 
{  return !(y < x); }

template <class T, class Pred, class Alloc>
inline bool operator>=(const set<T,Pred,Alloc>& x, 
                       const set<T,Pred,Alloc>& y) 
{  return !(x < y);  }

#ifndef BOOST_INTERPROCESS_RVALUE_REFERENCE
template <class T, class Pred, class Alloc>
inline void swap(set<T,Pred,Alloc>& x, 
                 set<T,Pred,Alloc>& y) 
{  x.swap(y);  }

template <class T, class Pred, class Alloc>
inline void swap(set<T,Pred,Alloc>& x, 
                 detail::moved_object<set<T,Pred,Alloc> >& y) 
{  x.swap(y.get());  }

template <class T, class Pred, class Alloc>
inline void swap(detail::moved_object<set<T,Pred,Alloc> >& y, 
                 set<T,Pred,Alloc>& x) 
{  y.swap(x.get());  }

#else
template <class T, class Pred, class Alloc>
inline void swap(set<T,Pred,Alloc>&&x, 
                 set<T,Pred,Alloc>&&y) 
{  x.swap(y);  }
#endif

/// @cond

//!This class is movable
template <class T, class P, class A>
struct is_movable<set<T, P, A> >
{
   enum {   value = true };
};

//!has_trivial_destructor_after_move<> == true_type
//!specialization for optimizations
template <class T, class C, class A>
struct has_trivial_destructor_after_move<set<T, C, A> >
{
   enum {   value = 
               has_trivial_destructor<A>::value &&
               has_trivial_destructor<C>::value  };
};

// Forward declaration of operators < and ==, needed for friend declaration.

template <class T, class Pred, class Alloc>
inline bool operator==(const multiset<T,Pred,Alloc>& x, 
                       const multiset<T,Pred,Alloc>& y);

template <class T, class Pred, class Alloc>
inline bool operator<(const multiset<T,Pred,Alloc>& x, 
                      const multiset<T,Pred,Alloc>& y);
/// @endcond

//! A multiset is a kind of associative container that supports equivalent keys 
//! (possibly contains multiple copies of the same key value) and provides for 
//! fast retrieval of the keys themselves. Class multiset supports bidirectional iterators.
//! 
//! A multiset satisfies all of the requirements of a container and of a reversible 
//! container, and of an associative container). multiset also provides most operations 
//! described for duplicate keys.
template <class T, class Pred, class Alloc>
class multiset 
{
   /// @cond
   private:
   typedef detail::rbtree<T, T, 
                     detail::identity<T>, Pred, Alloc> tree_t;
   tree_t m_tree;  // red-black tree representing multiset
   /// @endcond

   public:
   // typedefs:
   typedef typename tree_t::key_type               key_type;
   typedef typename tree_t::value_type             value_type;
   typedef typename tree_t::pointer                pointer;
   typedef typename tree_t::const_pointer          const_pointer;
   typedef typename tree_t::reference              reference;
   typedef typename tree_t::const_reference        const_reference;
   typedef Pred                                    key_compare;
   typedef Pred                                    value_compare;
   typedef typename tree_t::iterator               iterator;
   typedef typename tree_t::const_iterator         const_iterator;
   typedef typename tree_t::reverse_iterator       reverse_iterator;
   typedef typename tree_t::const_reverse_iterator const_reverse_iterator;
   typedef typename tree_t::size_type              size_type;
   typedef typename tree_t::difference_type        difference_type;
   typedef typename tree_t::allocator_type         allocator_type;
   typedef typename tree_t::stored_allocator_type  stored_allocator_type;

   //! <b>Effects</b>: Constructs an empty multiset using the specified comparison
   //!   object and allocator.
   //! 
   //! <b>Complexity</b>: Constant.
   explicit multiset(const Pred& comp = Pred(),
                     const allocator_type& a = allocator_type())
      : m_tree(comp, a)
   {}

   //! <b>Effects</b>: Constructs an empty multiset using the specified comparison object
   //!   and allocator, and inserts elements from the range [first ,last ).
   //! 
   //! <b>Complexity</b>: Linear in N if the range [first ,last ) is already sorted using 
   //! comp and otherwise N logN, where N is last - first.
   template <class InputIterator>
   multiset(InputIterator first, InputIterator last,
            const Pred& comp = Pred(),
            const allocator_type& a = allocator_type())
      : m_tree(first, last, comp, a, false) 
   {}

   //! <b>Effects</b>: Copy constructs a multiset.
   //! 
   //! <b>Complexity</b>: Linear in x.size().
   multiset(const multiset<T,Pred,Alloc>& x) 
      : m_tree(x.m_tree)
   {}

   //! <b>Effects</b>: Move constructs a multiset. Constructs *this using x's resources.
   //! 
   //! <b>Complexity</b>: Construct.
   //! 
   //! <b>Postcondition</b>: x is emptied.
   #ifndef BOOST_INTERPROCESS_RVALUE_REFERENCE
   multiset(const detail::moved_object<multiset<T,Pred,Alloc> >& x) 
      : m_tree(detail::move_impl(x.get().m_tree))
   {}
   #else
   multiset(multiset<T,Pred,Alloc> &&x) 
      : m_tree(detail::move_impl(x.m_tree))
   {}
   #endif

   //! <b>Effects</b>: Makes *this a copy of x.
   //! 
   //! <b>Complexity</b>: Linear in x.size().
   multiset<T,Pred,Alloc>& operator=(const multiset<T,Pred,Alloc>& x) 
   {  m_tree = x.m_tree;   return *this;  }

   //! <b>Effects</b>: this->swap(x.get()).
   //! 
   //! <b>Complexity</b>: Constant.
   #ifndef BOOST_INTERPROCESS_RVALUE_REFERENCE
   multiset<T,Pred,Alloc>& operator=(const detail::moved_object<multiset<T,Pred,Alloc> >& x) 
   {  m_tree = detail::move_impl(x.get().m_tree);   return *this;  }
   #else
   multiset<T,Pred,Alloc>& operator=(multiset<T,Pred,Alloc> &&x) 
   {  m_tree = detail::move_impl(x.m_tree);   return *this;  }
   #endif

   //! <b>Effects</b>: Returns the comparison object out
   //!   of which a was constructed.
   //! 
   //! <b>Complexity</b>: Constant.
   key_compare key_comp() const 
   { return m_tree.key_comp(); }

   //! <b>Effects</b>: Returns an object of value_compare constructed out
   //!   of the comparison object.
   //! 
   //! <b>Complexity</b>: Constant.
   value_compare value_comp() const 
   { return m_tree.key_comp(); }

   //! <b>Effects</b>: Returns a copy of the Allocator that
   //!   was passed to the object's constructor.
   //! 
   //! <b>Complexity</b>: Constant.
   allocator_type get_allocator() const 
   { return m_tree.get_allocator(); }

   const stored_allocator_type &get_stored_allocator() const 
   { return m_tree.get_stored_allocator(); }

   stored_allocator_type &get_stored_allocator()
   { return m_tree.get_stored_allocator(); }

   //! <b>Effects</b>: Returns an iterator to the first element contained in the container.
   //! 
   //! <b>Throws</b>: Nothing.
   //! 
   //! <b>Complexity</b>: Constant.
   iterator begin() 
   { return m_tree.begin(); }

   //! <b>Effects</b>: Returns a const_iterator to the first element contained in the container.
   //! 
   //! <b>Throws</b>: Nothing.
   //! 
   //! <b>Complexity</b>: Constant.
   const_iterator begin() const 
   { return m_tree.begin(); }

   //! <b>Effects</b>: Returns an iterator to the end of the container.
   //! 
   //! <b>Throws</b>: Nothing.
   //! 
   //! <b>Complexity</b>: Constant.
   iterator end() 
   { return m_tree.end(); }

   //! <b>Effects</b>: Returns a const_iterator to the end of the container.
   //! 
   //! <b>Throws</b>: Nothing.
   //! 
   //! <b>Complexity</b>: Constant.
   const_iterator end() const 
   { return m_tree.end(); }

   //! <b>Effects</b>: Returns a reverse_iterator pointing to the beginning 
   //! of the reversed container.