===================================================================
@@ -330,7 +330,7 @@
inline bool
operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
- { return __x._M_equal(__y); }
+ { return static_cast<const _GLIBCXX_STD_BASE&>(__x) == __y; }
template<typename _Key, typename _Tp, typename _Hash,
typename _Pred, typename _Alloc>
@@ -599,7 +599,7 @@
inline bool
operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
- { return __x._M_equal(__y); }
+ { return static_cast<const _GLIBCXX_STD_BASE&>(__x) == __y; }
template<typename _Key, typename _Tp, typename _Hash,
typename _Pred, typename _Alloc>
===================================================================
@@ -482,7 +482,7 @@
inline bool
operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
- { return __x._M_equal(__y); }
+ { return __x._M_base() == __y._M_base(); }
template<typename _Key, typename _Tp, typename _Hash,
typename _Pred, typename _Alloc>
@@ -929,7 +929,7 @@
inline bool
operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
- { return __x._M_equal(__y); }
+ { return __x._M_base() == __y._M_base(); }
template<typename _Key, typename _Tp, typename _Hash,
typename _Pred, typename _Alloc>
===================================================================
@@ -95,41 +95,654 @@
class _Pred = std::equal_to<_Key>,
class _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
class unordered_map
- : public __umap_hashtable<_Key, _Tp, _Hash, _Pred, _Alloc>
{
- typedef __umap_hashtable<_Key, _Tp, _Hash, _Pred, _Alloc> _Base;
+ typedef __umap_hashtable<_Key, _Tp, _Hash, _Pred, _Alloc> _Hashtable;
+ _Hashtable _M_h;
public:
- typedef typename _Base::value_type value_type;
- typedef typename _Base::size_type size_type;
- typedef typename _Base::hasher hasher;
- typedef typename _Base::key_equal key_equal;
- typedef typename _Base::allocator_type allocator_type;
+ // typedefs:
+ //@{
+ /// Public typedefs.
+ typedef typename _Hashtable::key_type key_type;
+ typedef typename _Hashtable::value_type value_type;
+ typedef typename _Hashtable::mapped_type mapped_type;
+ typedef typename _Hashtable::hasher hasher;
+ typedef typename _Hashtable::key_equal key_equal;
+ typedef typename _Hashtable::allocator_type allocator_type;
+ //@}
+ //@{
+ /// Iterator-related typedefs.
+ typedef typename allocator_type::pointer pointer;
+ typedef typename allocator_type::const_pointer const_pointer;
+ typedef typename allocator_type::reference reference;
+ typedef typename allocator_type::const_reference const_reference;
+ typedef typename _Hashtable::iterator iterator;
+ typedef typename _Hashtable::const_iterator const_iterator;
+ typedef typename _Hashtable::local_iterator local_iterator;
+ typedef typename _Hashtable::const_local_iterator const_local_iterator;
+ typedef typename _Hashtable::size_type size_type;
+ typedef typename _Hashtable::difference_type difference_type;
+ //@}
+
+ //construct/destroy/copy
+
+ /**
+ * @brief Default constructor creates no elements.
+ * @param __n Initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ */
explicit
unordered_map(size_type __n = 10,
const hasher& __hf = hasher(),
const key_equal& __eql = key_equal(),
const allocator_type& __a = allocator_type())
- : _Base(__n, __hf, __eql, __a)
+ : _M_h(__n, __hf, __eql, __a)
{ }
+ /**
+ * @brief Builds an %unordered_map from a range.
+ * @param __first An input iterator.
+ * @param __last An input iterator.
+ * @param __n Minimal initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ *
+ * Create an %unordered_map consisting of copies of the elements from
+ * [__first,__last). This is linear in N (where N is
+ * distance(__first,__last)).
+ */
template<typename _InputIterator>
unordered_map(_InputIterator __f, _InputIterator __l,
size_type __n = 0,
const hasher& __hf = hasher(),
const key_equal& __eql = key_equal(),
const allocator_type& __a = allocator_type())
- : _Base(__f, __l, __n, __hf, __eql, __a)
+ : _M_h(__f, __l, __n, __hf, __eql, __a)
{ }
+ /// Copy constructor.
+ unordered_map(const unordered_map&) = default;
+
+ /// Move constrcutor.
+ unordered_map(unordered_map&&) = default;
+
+ /**
+ * @brief Builds an %unordered_map from an initializer_list.
+ * @param __l An initializer_list.
+ * @param __n Minimal initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ *
+ * Create an %unordered_map consisting of copies of the elements in the
+ * list. This is linear in N (where N is @a __l.size()).
+ */
unordered_map(initializer_list<value_type> __l,
size_type __n = 0,
const hasher& __hf = hasher(),
const key_equal& __eql = key_equal(),
const allocator_type& __a = allocator_type())
- : _Base(__l.begin(), __l.end(), __n, __hf, __eql, __a)
+ : _M_h(__l, __n, __hf, __eql, __a)
{ }
+
+ /// Copy assignment operator.
+ unordered_map&
+ operator=(const unordered_map&) = default;
+
+ /// Move assignment operator.
+ unordered_map&
+ operator=(unordered_map&&) = default;
+
+ /**
+ * @brief %Unordered_map list assignment operator.
+ * @param __l An initializer_list.
+ *
+ * This function fills an %unordered_map with copies of the elements in
+ * the initializer list @a __l.
+ *
+ * Note that the assignment completely changes the %unordered_map and
+ * that the resulting %unordered_map's size is the same as the number
+ * of elements assigned. Old data may be lost.
+ */
+ unordered_map&
+ operator=(initializer_list<value_type> __l)
+ {
+ _M_h = __l;
+ return *this;
+ }
+
+ /// Returns the allocator object with which the %unordered_map was
+ /// constructed.
+ allocator_type
+ get_allocator() const noexcept
+ { return _M_h.get_allocator(); }
+
+ // size and capacity:
+
+ /// Returns true if the %unordered_map is empty.
+ bool
+ empty() const noexcept
+ { return _M_h.empty(); }
+
+ /// Returns the size of the %unordered_map.
+ size_type
+ size() const noexcept
+ { return _M_h.size(); }
+
+ /// Returns the maximum size of the %unordered_map.
+ size_type
+ max_size() const noexcept
+ { return _M_h.max_size(); }
+
+ // iterators.
+
+ /**
+ * Returns a read/write iterator that points to the first element in the
+ * %unordered_map.
+ */
+ iterator
+ begin() noexcept
+ { return _M_h.begin(); }
+
+ //@{
+ /**
+ * Returns a read-only (constant) iterator that points to the first
+ * element in the %unordered_map.
+ */
+ const_iterator
+ begin() const noexcept
+ { return _M_h.begin(); }
+
+ const_iterator
+ cbegin() const noexcept
+ { return _M_h.begin(); }
+ //@}
+
+ /**
+ * Returns a read/write iterator that points one past the last element in
+ * the %unordered_map.
+ */
+ iterator
+ end() noexcept
+ { return _M_h.end(); }
+
+ //@{
+ /**
+ * Returns a read-only (constant) iterator that points one past the last
+ * element in the %unordered_map.
+ */
+ const_iterator
+ end() const noexcept
+ { return _M_h.end(); }
+
+ const_iterator
+ cend() const noexcept
+ { return _M_h.end(); }
+ //@}
+
+ // modifiers.
+
+ /**
+ * @brief Attempts to build and insert a std::pair into the %unordered_map.
+ *
+ * @param __args Arguments used to generate a new pair instance (see
+ * std::piecewise_contruct for passing arguments to each
+ * part of the pair constructor).
+ *
+ * @return A pair, of which the first element is an iterator that points
+ * to the possibly inserted pair, and the second is a bool that
+ * is true if the pair was actually inserted.
+ *
+ * This function attempts to build and insert a (key, value) %pair into
+ * the %unordered_map.
+ * An %unordered_map relies on unique keys and thus a %pair is only
+ * inserted if its first element (the key) is not already present in the
+ * %unordered_map.
+ *
+ * Insertion requires amortized constant time.
+ */
+ template<typename... _Args>
+ std::pair<iterator, bool>
+ emplace(_Args&&... __args)
+ { return _M_h.emplace(std::forward<_Args>(__args)...); }
+
+ /**
+ * @brief Attempts to build and insert a std::pair into the %unordered_map.
+ *
+ * @param __pos An iterator that serves as a hint as to where the pair
+ * should be inserted.
+ * @param __args Arguments used to generate a new pair instance (see
+ * std::piecewise_contruct for passing arguments to each
+ * part of the pair constructor).
+ * @return An iterator that points to the element with key of the
+ * std::pair built from @a __args (may or may not be that
+ * std::pair).
+ *
+ * This function is not concerned about whether the insertion took place,
+ * and thus does not return a boolean like the single-argument emplace()
+ * does.
+ * Note that the first parameter is only a hint and can potentially
+ * improve the performance of the insertion process. A bad hint would
+ * cause no gains in efficiency.
+ *
+ * See
+ * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
+ * for more on @a hinting.
+ *
+ * Insertion requires amortized constant time.
+ */
+ template<typename... _Args>
+ iterator
+ emplace_hint(const_iterator __pos, _Args&&... __args)
+ { return _M_h.emplace_hint(__pos, std::forward<_Args>(__args)...); }
+
+ //@{
+ /**
+ * @brief Attempts to insert a std::pair into the %unordered_map.
+
+ * @param __x Pair to be inserted (see std::make_pair for easy
+ * creation of pairs).
+ *
+ * @return A pair, of which the first element is an iterator that
+ * points to the possibly inserted pair, and the second is
+ * a bool that is true if the pair was actually inserted.
+ *
+ * This function attempts to insert a (key, value) %pair into the
+ * %unordered_map. An %unordered_map relies on unique keys and thus a
+ * %pair is only inserted if its first element (the key) is not already
+ * present in the %unordered_map.
+ *
+ * Insertion requires amortized constant time.
+ */
+ std::pair<iterator, bool>
+ insert(const value_type& __x)
+ { return _M_h.insert(__x); }
+
+ template<typename _Pair>
+ std::pair<iterator, bool>
+ insert(_Pair&& __x)
+ { return _M_h.insert(std::move(__x)); }
+ //@}
+
+ //@{
+ /**
+ * @brief Attempts to insert a std::pair into the %unordered_map.
+ * @param __hint An iterator that serves as a hint as to where the
+ * pair should be inserted.
+ * @param __x Pair to be inserted (see std::make_pair for easy creation
+ * of pairs).
+ * @return An iterator that points to the element with key of
+ * @a __x (may or may not be the %pair passed in).
+ *
+ * This function is not concerned about whether the insertion took place,
+ * and thus does not return a boolean like the single-argument insert()
+ * does. Note that the first parameter is only a hint and can
+ * potentially improve the performance of the insertion process. A bad
+ * hint would cause no gains in efficiency.
+ *
+ * See
+ * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
+ * for more on @a hinting.
+ *
+ * Insertion requires amortized constant time.
+ */
+ iterator
+ insert(const_iterator __hint, const value_type& __x)
+ { return _M_h.insert(__hint, __x); }
+
+ template<typename _Pair>
+ iterator
+ insert(const_iterator __hint, _Pair&& __x)
+ { return _M_h.insert(__hint, std::move(__x)); }
+ //@}
+
+ /**
+ * @brief A template function that attempts to insert a range of
+ * elements.
+ * @param __first Iterator pointing to the start of the range to be
+ * inserted.
+ * @param __last Iterator pointing to the end of the range.
+ *
+ * Complexity similar to that of the range constructor.
+ */
+ template<typename _InputIterator>
+ void
+ insert(_InputIterator __first, _InputIterator __last)
+ { _M_h.insert(__first, __last); }
+
+ /**
+ * @brief Attempts to insert a list of elements into the %unordered_map.
+ * @param __l A std::initializer_list<value_type> of elements
+ * to be inserted.
+ *
+ * Complexity similar to that of the range constructor.
+ */
+ void
+ insert(initializer_list<value_type> __l)
+ { _M_h.insert(__l); }
+
+ //@{
+ /**
+ * @brief Erases an element from an %unordered_map.
+ * @param __position An iterator pointing to the element to be erased.
+ * @return An iterator pointing to the element immediately following
+ * @a __position prior to the element being erased. If no such
+ * element exists, end() is returned.
+ *
+ * This function erases an element, pointed to by the given iterator,
+ * from an %unordered_map.
+ * Note that this function only erases the element, and that if the
+ * element is itself a pointer, the pointed-to memory is not touched in
+ * any way. Managing the pointer is the user's responsibility.
+ */
+ iterator
+ erase(const_iterator __position)
+ { return _M_h.erase(__position); }
+
+ // LWG 2059.
+ iterator
+ erase(iterator __it)
+ { return _M_h.erase(__it); }
+ //@}
+
+ /**
+ * @brief Erases elements according to the provided key.
+ * @param __x Key of element to be erased.
+ * @return The number of elements erased.
+ *
+ * This function erases all the elements located by the given key from
+ * an %unordered_map. For an %unordered_map the result of this function
+ * can only be 0 (not present) or 1 (present).
+ * Note that this function only erases the element, and that if the
+ * element is itself a pointer, the pointed-to memory is not touched in
+ * any way. Managing the pointer is the user's responsibility.
+ */
+ size_type
+ erase(const key_type& __x)
+ { return _M_h.erase(__x); }
+
+ /**
+ * @brief Erases a [__first,__last) range of elements from an
+ * %unordered_map.
+ * @param __first Iterator pointing to the start of the range to be
+ * erased.
+ * @param __last Iterator pointing to the end of the range to
+ * be erased.
+ * @return The iterator @a __last.
+ *
+ * This function erases a sequence of elements from an %unordered_map.
+ * Note that this function only erases the elements, and that if
+ * the element is itself a pointer, the pointed-to memory is not touched
+ * in any way. Managing the pointer is the user's responsibility.
+ */
+ iterator
+ erase(const_iterator __first, const_iterator __last)
+ { return _M_h.erase(__first, __last); }
+
+ /**
+ * Erases all elements in an %unordered_map.
+ * Note that this function only erases the elements, and that if the
+ * elements themselves are pointers, the pointed-to memory is not touched
+ * in any way. Managing the pointer is the user's responsibility.
+ */
+ void
+ clear() noexcept
+ { _M_h.clear(); }
+
+ /**
+ * @brief Swaps data with another %unordered_map.
+ * @param __x An %unordered_map of the same element and allocator
+ * types.
+ *
+ * This exchanges the elements between two %unordered_map in constant time.
+ * Note that the global std::swap() function is specialized such that
+ * std::swap(m1,m2) will feed to this function.
+ */
+ void
+ swap(unordered_map& __x)
+ { _M_h.swap(__x._M_h); }
+
+ // observers.
+
+ /// Returns the hash functor object with which the %unordered_map was
+ /// constructed.
+ hasher
+ hash_function() const
+ { return _M_h.hash_function(); }
+
+ /// Returns the key comparison object with which the %unordered_map was
+ /// constructed.
+ key_equal
+ key_eq() const
+ { return _M_h.key_eq(); }
+
+ // lookup.
+
+ //@{
+ /**
+ * @brief Tries to locate an element in an %unordered_map.
+ * @param __x Key to be located.
+ * @return Iterator pointing to sought-after element, or end() if not
+ * found.
+ *
+ * This function takes a key and tries to locate the element with which
+ * the key matches. If successful the function returns an iterator
+ * pointing to the sought after element. If unsuccessful it returns the
+ * past-the-end ( @c end() ) iterator.
+ */
+ iterator
+ find(const key_type& __x)
+ { return _M_h.find(__x); }
+
+ const_iterator
+ find(const key_type& __x) const
+ { return _M_h.find(__x); }
+ //@}
+
+ /**
+ * @brief Finds the number of elements.
+ * @param __x Key to count.
+ * @return Number of elements with specified key.
+ *
+ * This function only makes sense for %unordered_multimap; for
+ * %unordered_map the result will either be 0 (not present) or 1
+ * (present).
+ */
+ size_type
+ count(const key_type& __x) const
+ { return _M_h.count(__x); }
+
+ //@{
+ /**
+ * @brief Finds a subsequence matching given key.
+ * @param __x Key to be located.
+ * @return Pair of iterators that possibly points to the subsequence
+ * matching given key.
+ *
+ * This function probably only makes sense for %unordered_multimap.
+ */
+ std::pair<iterator, iterator>
+ equal_range(const key_type& __x)
+ { return _M_h.equal_range(__x); }
+
+ std::pair<const_iterator, const_iterator>
+ equal_range(const key_type& __x) const
+ { return _M_h.equal_range(__x); }
+ //@}
+
+ //@{
+ /**
+ * @brief Subscript ( @c [] ) access to %unordered_map data.
+ * @param __k The key for which data should be retrieved.
+ * @return A reference to the data of the (key,data) %pair.
+ *
+ * Allows for easy lookup with the subscript ( @c [] )operator. Returns
+ * data associated with the key specified in subscript. If the key does
+ * not exist, a pair with that key is created using default values, which
+ * is then returned.
+ *
+ * Lookup requires constant time.
+ */
+ mapped_type&
+ operator[](const key_type& __k)
+ { return _M_h[__k]; }
+
+ mapped_type&
+ operator[](key_type&& __k)
+ { return _M_h[std::move(__k)]; }
+ //@}
+
+ //@{
+ /**
+ * @brief Access to %unordered_map data.
+ * @param __k The key for which data should be retrieved.
+ * @return A reference to the data whose key is equal to @a __k, if
+ * such a data is present in the %unordered_map.
+ * @throw std::out_of_range If no such data is present.
+ */
+ mapped_type&
+ at(const key_type& __k)
+ { return _M_h.at(__k); }
+
+ const mapped_type&
+ at(const key_type& __k) const
+ { return _M_h.at(__k); }
+ //@}
+
+ // bucket interface.
+
+ /// Returns the number of buckets of the %unordered_map.
+ size_type
+ bucket_count() const noexcept
+ { return _M_h.bucket_count(); }
+
+ /// Returns the maximum number of buckets of the %unordered_map.
+ size_type
+ max_bucket_count() const noexcept
+ { return _M_h.max_bucket_count(); }
+
+ /*
+ * @brief Returns the number of elements in a given bucket.
+ * @param __n A bucket index.
+ * @return The number of elements in the bucket.
+ */
+ size_type
+ bucket_size(size_type __n) const
+ { return _M_h.bucket_size(__n); }
+
+ /*
+ * @brief Returns the bucket index of a given element.
+ * @param __key A key instance.
+ * @return The key bucket index.
+ */
+ size_type
+ bucket(const key_type& __key) const
+ { return _M_h.bucket(__key); }
+
+ /**
+ * @brief Returns a read/write iterator pointing to the first bucket
+ * element.
+ * @param __n The bucket index.
+ * @return A read/write local iterator.
+ */
+ local_iterator
+ begin(size_type __n)
+ { return _M_h.begin(__n); }
+
+ //@{
+ /**
+ * @brief Returns a read-only (constant) iterator pointing to the first
+ * bucket element.
+ * @param __n The bucket index.
+ * @return A read-only local iterator.
+ */
+ const_local_iterator
+ begin(size_type __n) const
+ { return _M_h.begin(__n); }
+
+ const_local_iterator
+ cbegin(size_type __n) const
+ { return _M_h.cbegin(__n); }
+ //@}
+
+ /**
+ * @brief Returns a read/write iterator pointing to one past the last
+ * bucket elements.
+ * @param __n The bucket index.
+ * @return A read/write local iterator.
+ */
+ local_iterator
+ end(size_type __n)
+ { return _M_h.end(__n); }
+
+ //@{
+ /**
+ * @brief Returns a read-only (constant) iterator pointing to one past
+ * the last bucket elements.
+ * @param __n The bucket index.
+ * @return A read-only local iterator.
+ */
+ const_local_iterator
+ end(size_type __n) const
+ { return _M_h.end(__n); }
+
+ const_local_iterator
+ cend(size_type __n) const
+ { return _M_h.cend(__n); }
+ //@}
+
+ // hash policy.
+
+ /// Returns the average number of elements per bucket.
+ float
+ load_factor() const noexcept
+ { return _M_h.load_factor(); }
+
+ /// Returns a positive number that the %unordered_map tries to keep the
+ /// load factor less than or equal to.
+ float
+ max_load_factor() const noexcept
+ { return _M_h.max_load_factor(); }
+
+ /**
+ * @brief Change the %unordered_map maximum load factor.
+ * @param __z The new maximum load factor.
+ */
+ void
+ max_load_factor(float __z)
+ { _M_h.max_load_factor(__z); }
+
+ /**
+ * @brief May rehash the %unordered_map.
+ * @param __n The new number of buckets.
+ *
+ * Rehash will occur only if the new number of buckets respect the
+ * %unordered_map maximum load factor.
+ */
+ void
+ rehash(size_type __n)
+ { _M_h.rehash(__n); }
+
+ /**
+ * @brief Prepare the %unordered_map for a specified number of
+ * elements.
+ * @param __n Number of elements required.
+ *
+ * Same as rehash(ceil(n / max_load_factor())).
+ */
+ void
+ reserve(size_type __n)
+ { _M_h.reserve(__n); }
+
+ template<typename _Key1, typename _Tp1, typename _Hash1, typename _Pred1,
+ typename _Alloc1>
+ friend bool
+ operator==(const unordered_map<_Key1, _Tp1, _Hash1, _Pred1, _Alloc1>&,
+ const unordered_map<_Key1, _Tp1, _Hash1, _Pred1, _Alloc1>&);
};
/**
@@ -159,41 +772,595 @@
class _Pred = std::equal_to<_Key>,
class _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
class unordered_multimap
- : public __ummap_hashtable<_Key, _Tp, _Hash, _Pred, _Alloc>
{
- typedef __ummap_hashtable<_Key, _Tp, _Hash, _Pred, _Alloc> _Base;
+ typedef __ummap_hashtable<_Key, _Tp, _Hash, _Pred, _Alloc> _Hashtable;
+ _Hashtable _M_h;
public:
- typedef typename _Base::value_type value_type;
- typedef typename _Base::size_type size_type;
- typedef typename _Base::hasher hasher;
- typedef typename _Base::key_equal key_equal;
- typedef typename _Base::allocator_type allocator_type;
+ // typedefs:
+ //@{
+ /// Public typedefs.
+ typedef typename _Hashtable::key_type key_type;
+ typedef typename _Hashtable::value_type value_type;
+ typedef typename _Hashtable::mapped_type mapped_type;
+ typedef typename _Hashtable::hasher hasher;
+ typedef typename _Hashtable::key_equal key_equal;
+ typedef typename _Hashtable::allocator_type allocator_type;
+ //@}
+ //@{
+ /// Iterator-related typedefs.
+ typedef typename allocator_type::pointer pointer;
+ typedef typename allocator_type::const_pointer const_pointer;
+ typedef typename allocator_type::reference reference;
+ typedef typename allocator_type::const_reference const_reference;
+ typedef typename _Hashtable::iterator iterator;
+ typedef typename _Hashtable::const_iterator const_iterator;
+ typedef typename _Hashtable::local_iterator local_iterator;
+ typedef typename _Hashtable::const_local_iterator const_local_iterator;
+ typedef typename _Hashtable::size_type size_type;
+ typedef typename _Hashtable::difference_type difference_type;
+ //@}
+
+ //construct/destroy/copy
+
+ /**
+ * @brief Default constructor creates no elements.
+ * @param __n Initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ */
explicit
unordered_multimap(size_type __n = 10,
const hasher& __hf = hasher(),
const key_equal& __eql = key_equal(),
const allocator_type& __a = allocator_type())
- : _Base(__n, __hf, __eql, __a)
+ : _M_h(__n, __hf, __eql, __a)
{ }
+ /**
+ * @brief Builds an %unordered_multimap from a range.
+ * @param __first An input iterator.
+ * @param __last An input iterator.
+ * @param __n Minimal initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ *
+ * Create an %unordered_multimap consisting of copies of the elements
+ * from [__first,__last). This is linear in N (where N is
+ * distance(__first,__last)).
+ */
template<typename _InputIterator>
unordered_multimap(_InputIterator __f, _InputIterator __l,
size_type __n = 0,
const hasher& __hf = hasher(),
const key_equal& __eql = key_equal(),
const allocator_type& __a = allocator_type())
- : _Base(__f, __l, __n, __hf, __eql, __a)
+ : _M_h(__f, __l, __n, __hf, __eql, __a)
{ }
+ /// Copy constructor.
+ unordered_multimap(const unordered_multimap&) = default;
+
+ /// Move constrcutor.
+ unordered_multimap(unordered_multimap&&) = default;
+
+ /**
+ * @brief Builds an %unordered_multimap from an initializer_list.
+ * @param __l An initializer_list.
+ * @param __n Minimal initial number of buckets.
+ * @param __hf A hash functor.
+ * @param __eql A key equality functor.
+ * @param __a An allocator object.
+ *
+ * Create an %unordered_multimap consisting of copies of the elements in
+ * the list. This is linear in N (where N is @a __l.size()).
+ */
unordered_multimap(initializer_list<value_type> __l,
size_type __n = 0,
const hasher& __hf = hasher(),
const key_equal& __eql = key_equal(),
const allocator_type& __a = allocator_type())
- : _Base(__l.begin(), __l.end(), __n, __hf, __eql, __a)
+ : _M_h(__l, __n, __hf, __eql, __a)
{ }
+
+ /// Copy assignment operator.
+ unordered_multimap&
+ operator=(const unordered_multimap&) = default;
+
+ /// Move assignment operator.
+ unordered_multimap&
+ operator=(unordered_multimap&&) = default;
+
+ /**
+ * @brief %Unordered_multimap list assignment operator.
+ * @param __l An initializer_list.
+ *
+ * This function fills an %unordered_multimap with copies of the elements
+ * in the initializer list @a __l.
+ *
+ * Note that the assignment completely changes the %unordered_multimap
+ * and that the resulting %unordered_multimap's size is the same as the
+ * number of elements assigned. Old data may be lost.
+ */
+ unordered_multimap&
+ operator=(initializer_list<value_type> __l)
+ {
+ _M_h = __l;
+ return *this;
+ }
+
+ /// Returns the allocator object with which the %unordered_multimap was
+ /// constructed.
+ allocator_type
+ get_allocator() const noexcept
+ { return _M_h.get_allocator(); }
+
+ // size and capacity:
+
+ /// Returns true if the %unordered_multimap is empty.
+ bool
+ empty() const noexcept
+ { return _M_h.empty(); }
+
+ /// Returns the size of the %unordered_multimap.
+ size_type
+ size() const noexcept
+ { return _M_h.size(); }
+
+ /// Returns the maximum size of the %unordered_multimap.
+ size_type
+ max_size() const noexcept
+ { return _M_h.max_size(); }
+
+ // iterators.
+
+ /**
+ * Returns a read/write iterator that points to the first element in the
+ * %unordered_multimap.
+ */
+ iterator
+ begin() noexcept
+ { return _M_h.begin(); }
+
+ //@{
+ /**
+ * Returns a read-only (constant) iterator that points to the first
+ * element in the %unordered_multimap.
+ */
+ const_iterator
+ begin() const noexcept
+ { return _M_h.begin(); }
+
+ const_iterator
+ cbegin() const noexcept
+ { return _M_h.begin(); }
+ //@}
+
+ /**
+ * Returns a read/write iterator that points one past the last element in
+ * the %unordered_multimap.
+ */
+ iterator
+ end() noexcept
+ { return _M_h.end(); }
+
+ //@{
+ /**
+ * Returns a read-only (constant) iterator that points one past the last
+ * element in the %unordered_multimap.
+ */
+ const_iterator
+ end() const noexcept
+ { return _M_h.end(); }
+
+ const_iterator
+ cend() const noexcept
+ { return _M_h.end(); }
+ //@}
+
+ // modifiers.
+
+ /**
+ * @brief Attempts to build and insert a std::pair into the
+ * %unordered_multimap.
+ *
+ * @param __args Arguments used to generate a new pair instance (see
+ * std::piecewise_contruct for passing arguments to each
+ * part of the pair constructor).
+ *
+ * @return An iterator that points to the inserted pair.
+ *
+ * This function attempts to build and insert a (key, value) %pair into
+ * the %unordered_multimap.
+ *
+ * Insertion requires amortized constant time.
+ */
+ template<typename... _Args>
+ iterator
+ emplace(_Args&&... __args)
+ { return _M_h.emplace(std::forward<_Args>(__args)...); }
+
+ /**
+ * @brief Attempts to build and insert a std::pair into the %unordered_multimap.
+ *
+ * @param __pos An iterator that serves as a hint as to where the pair
+ * should be inserted.
+ * @param __args Arguments used to generate a new pair instance (see
+ * std::piecewise_contruct for passing arguments to each
+ * part of the pair constructor).
+ * @return An iterator that points to the element with key of the
+ * std::pair built from @a __args.
+ *
+ * Note that the first parameter is only a hint and can potentially
+ * improve the performance of the insertion process. A bad hint would
+ * cause no gains in efficiency.
+ *
+ * See
+ * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
+ * for more on @a hinting.
+ *
+ * Insertion requires amortized constant time.
+ */
+ template<typename... _Args>
+ iterator
+ emplace_hint(const_iterator __pos, _Args&&... __args)
+ { return _M_h.emplace_hint(__pos, std::forward<_Args>(__args)...); }
+
+ //@{
+ /**
+ * @brief Inserts a std::pair into the %unordered_multimap.
+ * @param __x Pair to be inserted (see std::make_pair for easy
+ * creation of pairs).
+ *
+ * @return An iterator that points to the inserted pair.
+ *
+ * Insertion requires amortized constant time.
+ */
+ iterator
+ insert(const value_type& __x)
+ { return _M_h.insert(__x); }
+
+ template<typename _Pair>
+ iterator
+ insert(_Pair&& __x)
+ { return _M_h.insert(std::move(__x)); }
+ //@}
+
+ //@{
+ /**
+ * @brief Inserts a std::pair into the %unordered_multimap.
+ * @param __hint An iterator that serves as a hint as to where the
+ * pair should be inserted.
+ * @param __x Pair to be inserted (see std::make_pair for easy creation
+ * of pairs).
+ * @return An iterator that points to the element with key of
+ * @a __x (may or may not be the %pair passed in).
+ *
+ * Note that the first parameter is only a hint and can potentially
+ * improve the performance of the insertion process. A bad hint would
+ * cause no gains in efficiency.
+ *
+ * See
+ * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt07ch17.html
+ * for more on @a hinting.
+ *
+ * Insertion requires amortized constant time.
+ */
+ iterator
+ insert(const_iterator __hint, const value_type& __x)
+ { return _M_h.insert(__hint, __x); }
+
+ template<typename _Pair>
+ iterator
+ insert(const_iterator __hint, _Pair&& __x)
+ { return _M_h.insert(__hint, std::move(__x)); }
+ //@}
+
+ /**
+ * @brief A template function that attempts to insert a range of
+ * elements.
+ * @param __first Iterator pointing to the start of the range to be
+ * inserted.
+ * @param __last Iterator pointing to the end of the range.
+ *
+ * Complexity similar to that of the range constructor.
+ */
+ template<typename _InputIterator>
+ void
+ insert(_InputIterator __first, _InputIterator __last)
+ { _M_h.insert(__first, __last); }
+
+ /**
+ * @brief Attempts to insert a list of elements into the
+ * %unordered_multimap.
+ * @param __l A std::initializer_list<value_type> of elements
+ * to be inserted.
+ *
+ * Complexity similar to that of the range constructor.
+ */
+ void
+ insert(initializer_list<value_type> __l)
+ { _M_h.insert(__l); }
+
+ //@{
+ /**
+ * @brief Erases an element from an %unordered_multimap.
+ * @param __position An iterator pointing to the element to be erased.
+ * @return An iterator pointing to the element immediately following
+ * @a __position prior to the element being erased. If no such
+ * element exists, end() is returned.
+ *
+ * This function erases an element, pointed to by the given iterator,
+ * from an %unordered_multimap.
+ * Note that this function only erases the element, and that if the
+ * element is itself a pointer, the pointed-to memory is not touched in
+ * any way. Managing the pointer is the user's responsibility.
+ */
+ iterator
+ erase(const_iterator __position)
+ { return _M_h.erase(__position); }
+
+ // LWG 2059.
+ iterator
+ erase(iterator __it)
+ { return _M_h.erase(__it); }
+ //@}
+
+ /**
+ * @brief Erases elements according to the provided key.
+ * @param __x Key of elements to be erased.
+ * @return The number of elements erased.
+ *
+ * This function erases all the elements located by the given key from
+ * an %unordered_multimap.
+ * Note that this function only erases the element, and that if the
+ * element is itself a pointer, the pointed-to memory is not touched in
+ * any way. Managing the pointer is the user's responsibility.
+ */
+ size_type
+ erase(const key_type& __x)
+ { return _M_h.erase(__x); }
+
+ /**
+ * @brief Erases a [__first,__last) range of elements from an
+ * %unordered_multimap.
+ * @param __first Iterator pointing to the start of the range to be
+ * erased.
+ * @param __last Iterator pointing to the end of the range to
+ * be erased.
+ * @return The iterator @a __last.
+ *
+ * This function erases a sequence of elements from an
+ * %unordered_multimap.
+ * Note that this function only erases the elements, and that if
+ * the element is itself a pointer, the pointed-to memory is not touched
+ * in any way. Managing the pointer is the user's responsibility.
+ */
+ iterator
+ erase(const_iterator __first, const_iterator __last)
+ { return _M_h.erase(__first, __last); }
+
+ /**
+ * Erases all elements in an %unordered_multimap.
+ * Note that this function only erases the elements, and that if the
+ * elements themselves are pointers, the pointed-to memory is not touched
+ * in any way. Managing the pointer is the user's responsibility.
+ */
+ void
+ clear() noexcept
+ { _M_h.clear(); }
+
+ /**
+ * @brief Swaps data with another %unordered_multimap.
+ * @param __x An %unordered_multimap of the same element and allocator
+ * types.
+ *
+ * This exchanges the elements between two %unordered_multimap in
+ * constant time.
+ * Note that the global std::swap() function is specialized such that
+ * std::swap(m1,m2) will feed to this function.
+ */
+ void
+ swap(unordered_multimap& __x)
+ { _M_h.swap(__x._M_h); }
+
+ // observers.
+
+ /// Returns the hash functor object with which the %unordered_multimap
+ /// was constructed.
+ hasher
+ hash_function() const
+ { return _M_h.hash_function(); }
+
+ /// Returns the key comparison object with which the %unordered_multimap
+ /// was constructed.
+ key_equal
+ key_eq() const
+ { return _M_h.key_eq(); }
+
+ // lookup.
+
+ //@{
+ /**
+ * @brief Tries to locate an element in an %unordered_multimap.
+ * @param __x Key to be located.
+ * @return Iterator pointing to sought-after element, or end() if not
+ * found.
+ *
+ * This function takes a key and tries to locate the element with which
+ * the key matches. If successful the function returns an iterator
+ * pointing to the sought after element. If unsuccessful it returns the
+ * past-the-end ( @c end() ) iterator.
+ */
+ iterator
+ find(const key_type& __x)
+ { return _M_h.find(__x); }
+
+ const_iterator
+ find(const key_type& __x) const
+ { return _M_h.find(__x); }
+ //@}
+
+ /**
+ * @brief Finds the number of elements.
+ * @param __x Key to count.
+ * @return Number of elements with specified key.
+ */
+ size_type
+ count(const key_type& __x) const
+ { return _M_h.count(__x); }
+
+ //@{
+ /**
+ * @brief Finds a subsequence matching given key.
+ * @param __x Key to be located.
+ * @return Pair of iterators that possibly points to the subsequence
+ * matching given key.
+ */
+ std::pair<iterator, iterator>
+ equal_range(const key_type& __x)
+ { return _M_h.equal_range(__x); }
+
+ std::pair<const_iterator, const_iterator>
+ equal_range(const key_type& __x) const
+ { return _M_h.equal_range(__x); }
+ //@}
+
+ // bucket interface.
+
+ /// Returns the number of buckets of the %unordered_multimap.
+ size_type
+ bucket_count() const noexcept
+ { return _M_h.bucket_count(); }
+
+ /// Returns the maximum number of buckets of the %unordered_multimap.
+ size_type
+ max_bucket_count() const noexcept
+ { return _M_h.max_bucket_count(); }
+
+ /*
+ * @brief Returns the number of elements in a given bucket.
+ * @param __n A bucket index.
+ * @return The number of elements in the bucket.
+ */
+ size_type
+ bucket_size(size_type __n) const
+ { return _M_h.bucket_size(__n); }
+
+ /*
+ * @brief Returns the bucket index of a given element.
+ * @param __key A key instance.
+ * @return The key bucket index.
+ */
+ size_type
+ bucket(const key_type& __key) const
+ { return _M_h.bucket(__key); }
+
+ /**
+ * @brief Returns a read/write iterator pointing to the first bucket
+ * element.
+ * @param __n The bucket index.
+ * @return A read/write local iterator.
+ */
+ local_iterator
+ begin(size_type __n)
+ { return _M_h.begin(__n); }
+
+ //@{
+ /**
+ * @brief Returns a read-only (constant) iterator pointing to the first
+ * bucket element.
+ * @param __n The bucket index.
+ * @return A read-only local iterator.
+ */
+ const_local_iterator
+ begin(size_type __n) const
+ { return _M_h.begin(__n); }
+
+ const_local_iterator
+ cbegin(size_type __n) const
+ { return _M_h.cbegin(__n); }
+ //@}
+
+ /**
+ * @brief Returns a read/write iterator pointing to one past the last
+ * bucket elements.
+ * @param __n The bucket index.
+ * @return A read/write local iterator.
+ */
+ local_iterator
+ end(size_type __n)
+ { return _M_h.end(__n); }
+
+ //@{
+ /**
+ * @brief Returns a read-only (constant) iterator pointing to one past
+ * the last bucket elements.
+ * @param __n The bucket index.
+ * @return A read-only local iterator.
+ */
+ const_local_iterator
+ end(size_type __n) const
+ { return _M_h.end(__n); }
+
+ const_local_iterator
+ cend(size_type __n) const
+ { return _M_h.cend(__n); }
+ //@}
+
+ // hash policy.
+
+ /// Returns the average number of elements per bucket.
+ float
+ load_factor() const noexcept
+ { return _M_h.load_factor(); }
+
+ /// Returns a positive number that the %unordered_multimap tries to keep
+ /// the load factor less than or equal to.
+ float
+ max_load_factor() const noexcept
+ { return _M_h.max_load_factor(); }
+
+ /**
+ * @brief Change the %unordered_multimap maximum load factor.
+ * @param __z The new maximum load factor.
+ */
+ void
+ max_load_factor(float __z)
+ { _M_h.max_load_factor(__z); }
+
+ /**
+ * @brief May rehash the %unordered_multimap.
+ * @param __n The new number of buckets.
+ *
+ * Rehash will occur only if the new number of buckets respect the
+ * %unordered_multimap maximum load factor.
+ */
+ void
+ rehash(size_type __n)
+ { _M_h.rehash(__n); }
+
+ /**
+ * @brief Prepare the %unordered_multimap for a specified number of
+ * elements.
+ * @param __n Number of elements required.
+ *
+ * Same as rehash(ceil(n / max_load_factor())).
+ */
+ void
+ reserve(size_type __n)
+ { _M_h.reserve(__n); }
+
+ template<typename _Key1, typename _Tp1, typename _Hash1, typename _Pred1,
+ typename _Alloc1>
+ friend bool
+ operator==(const unordered_multimap<_Key1, _Tp1,
+ _Hash1, _Pred1, _Alloc1>&,
+ const unordered_multimap<_Key1, _Tp1,
+ _Hash1, _Pred1, _Alloc1>&);
};
template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
@@ -212,7 +1379,7 @@
inline bool
operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
- { return __x._M_equal(__y); }
+ { return __x._M_h._M_equal(__y._M_h); }
template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline bool
@@ -224,7 +1391,7 @@
inline bool
operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
- { return __x._M_equal(__y); }
+ { return __x._M_h._M_equal(__y._M_h); }
template<class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline bool
===================================================================
@@ -158,29 +158,11 @@
: _M_h(__f, __l, __n, __hf, __eql, __a)
{ }
- /**
- * @brief %Unordered_set copy constructor.
- * @param __x An %unordered_set of identical element and allocator
- * types.
- *
- * The newly-created %unordered_set uses a copy of the allocation object
- * used by @a __x.
- */
- unordered_set(const unordered_set& __x)
- : _M_h(__x._M_h) { }
+ /// Copy constructor.
+ unordered_set(const unordered_set&) = default;
- /**
- * @brief %Unordered_set move constructor
- * @param __x An %unordered_set of identical element and allocator
- * types.
- *
- * The newly-created %unordered_set contains the exact contents of @a
- * __x. The contents of @a __x are a valid, but unspecified
- * %unordered_set.
- */
- unordered_set(unordered_set&& __x)
- : _M_h(std::move(__x._M_h))
- { }
+ /// Move constructor.
+ unordered_set(unordered_set&&) = default;
/**
* @brief Builds an %unordered_set from an initializer_list.
@@ -201,35 +183,13 @@
: _M_h(__l, __n, __hf, __eql, __a)
{ }
- /**
- * @brief %Unordered_set assignment operator.
- * @param __x An %unordered_set of identical element and allocator
- * types.
- *
- * All the elements of @a __x are copied, but unlike the copy
- * constructor, the allocator object is not copied.
- */
+ /// Copy assignment operator.
unordered_set&
- operator=(const unordered_set& __x)
- {
- _M_h = __x._M_h;
- return *this;
- }
+ operator=(const unordered_set&) = default;
- /**
- * @brief %Unordered_set move assignment operator.
- * @param __x An %unordered_set of identical element and allocator
- * types.
- *
- * The contents of @a __x are moved into this %unordered_set (without
- * copying). @a __x is a valid, but unspecified %unordered_set.
- */
+ /// Move assignment operator.
unordered_set&
- operator=(unordered_set&& __x)
- {
- _M_h = std::move(__x._M_h);
- return *this;
- }
+ operator=(unordered_set&&) = default;
/**
* @brief %Unordered_set list assignment operator.
@@ -330,7 +290,8 @@
*
* This function attempts to build and insert an element into the
* %unordered_set. An %unordered_set relies on unique keys and thus an
- * element is only inserted if it is not already present in the %set.
+ * element is only inserted if it is not already present in the
+ * %unordered_set.
*
* Insertion requires amortized constant time.
*/
@@ -802,29 +763,11 @@
: _M_h(__f, __l, __n, __hf, __eql, __a)
{ }
- /**
- * @brief %Unordered_multiset copy constructor.
- * @param __x An %unordered_multiset of identical element and allocator
- * types.
- *
- * The newly-created %unordered_multiset uses a copy of the allocation object
- * used by @a __x.
- */
- unordered_multiset(const unordered_multiset& __x)
- : _M_h(__x._M_h) { }
+ /// Copy constructor.
+ unordered_multiset(const unordered_multiset&) = default;
- /**
- * @brief %Unordered_multiset move constructor
- * @param __x An %unordered_multiset of identical element and allocator
- * types.
- *
- * The newly-created %unordered_multiset contains the exact contents of
- * @a __x. The contents of @a __x are a valid, but unspecified
- * %unordered_multiset.
- */
- unordered_multiset(unordered_multiset&& __x)
- : _M_h(std::move(__x._M_h))
- { }
+ /// Move constructor.
+ unordered_multiset(unordered_multiset&&) = default;
/**
* @brief Builds an %unordered_multiset from an initializer_list.
@@ -845,36 +788,13 @@
: _M_h(__l, __n, __hf, __eql, __a)
{ }
- /**
- * @brief %Unordered_multiset assignment operator.
- * @param __x An %unordered_multiset of identical element and allocator
- * types.
- *
- * All the elements of @a __x are copied, but unlike the copy
- * constructor, the allocator object is not copied.
- */
+ /// Copy assignment operator.
unordered_multiset&
- operator=(const unordered_multiset& __x)
- {
- _M_h = __x._M_h;
- return *this;
- }
+ operator=(const unordered_multiset&) = default;
- /**
- * @brief %Unordered_multiset move assignment operator.
- * @param __x An %unordered_multiset of identical element and allocator
- * types.
- *
- * The contents of @a __x are moved into this %unordered_multiset
- * (without copying). @a __x is a valid, but unspecified
- * %unordered_multiset.
- */
+ /// Move assignment operator.
unordered_multiset&
- operator=(unordered_multiset&& __x)
- {
- _M_h = std::move(__x._M_h);
- return *this;
- }
+ operator=(unordered_multiset&& __x) = default;
/**
* @brief %Unordered_multiset list assignment operator.