| std::multimap< _Key, _Tp, _Compare, _Alloc >(3cxx) | std::multimap< _Key, _Tp, _Compare, _Alloc >(3cxx) |
std::multimap< _Key, _Tp, _Compare, _Alloc > - A standard container made up of (key,value) pairs, which can be retrieved based on a key, in logarithmic time.
#include <stl_multimap.h>
typedef _Alloc allocator_type
typedef _Rep_type::const_iterator const_iterator
typedef _Alloc_traits::const_pointer const_pointer
typedef _Alloc_traits::const_reference const_reference
typedef _Rep_type::const_reverse_iterator const_reverse_iterator
typedef _Rep_type::difference_type difference_type
typedef _Rep_type::iterator iterator
typedef _Compare key_compare
typedef _Key key_type
typedef _Tp mapped_type
using node_type = typename _Rep_type::node_type
typedef _Alloc_traits::pointer pointer
typedef _Alloc_traits::reference reference
typedef _Rep_type::reverse_iterator reverse_iterator
typedef _Rep_type::size_type size_type
typedef std::pair< const _Key, _Tp > value_type
multimap ()=default
Default constructor creates no elements. template<typename _InputIterator
> multimap (_InputIterator __first, _InputIterator __last)
Builds a multimap from a range. template<typename _InputIterator >
multimap (_InputIterator __first, _InputIterator __last, const
_Compare &__comp, const allocator_type &__a=allocator_type())
Builds a multimap from a range. template<typename _InputIterator >
multimap (_InputIterator __first, _InputIterator __last, const
allocator_type &__a)
Allocator-extended range constructor. multimap (const _Compare
&__comp, const allocator_type &__a=allocator_type())
Creates a multimap with no elements. multimap (const allocator_type
&__a)
Allocator-extended default constructor. multimap (const multimap
&)=default
Multimap copy constructor. multimap (const multimap &__m,
const allocator_type &__a)
Allocator-extended copy constructor. multimap
(initializer_list< value_type > __l, const _Compare
&__comp=_Compare(), const allocator_type &__a=allocator_type())
Builds a multimap from an initializer_list. multimap
(initializer_list< value_type > __l, const
allocator_type &__a)
Allocator-extended initialier-list constructor. multimap
(multimap &&)=default
Multimap move constructor. multimap (multimap &&__m,
const allocator_type &__a)
noexcept(is_nothrow_copy_constructible< _Compare >::value
&&_Alloc_traits::_S_always_equal())
Allocator-extended move constructor. ~multimap ()=default
const_iterator begin () const noexcept
iterator begin () noexcept
const_iterator cbegin () const noexcept
const_iterator cend () const noexcept
void clear () noexcept
const_reverse_iterator crbegin () const noexcept
const_reverse_iterator crend () const noexcept
template<typename... _Args> iterator emplace (_Args &&...
__args)
Build and insert a std::pair into the multimap. template<typename...
_Args> iterator emplace_hint (const_iterator __pos, _Args
&&... __args)
Builds and inserts a std::pair into the multimap. bool empty () const
noexcept
const_iterator end () const noexcept
iterator end () noexcept
size_type erase (const key_type &__x)
Erases elements according to the provided key. iterator erase
(const_iterator __first, const_iterator __last)
Erases a [first,last) range of elements from a multimap. node_type
extract (const key_type &__x)
Extract a node. node_type extract (const_iterator __pos)
Extract a node. allocator_type get_allocator () const noexcept
Get a copy of the memory allocation object. template<typename
_InputIterator > void insert (_InputIterator __first,
_InputIterator __last)
A template function that attempts to insert a range of elements. iterator
insert (const_iterator __hint, node_type &&__nh)
Re-insert an extracted node. void insert (initializer_list<
value_type > __l)
Attempts to insert a list of std::pairs into the multimap. iterator
insert (node_type &&__nh)
Re-insert an extracted node. key_compare key_comp () const
size_type max_size () const noexcept
template<typename _Cmp2 > void merge (map< _Key, _Tp,
_Cmp2, _Alloc > &&__source)
template<typename _Cmp2 > void merge (map< _Key, _Tp,
_Cmp2, _Alloc > &__source)
template<typename _Cmp2 > void merge (multimap< _Key,
_Tp, _Cmp2, _Alloc > &&__source)
template<typename _Cmp2 > void merge (multimap< _Key,
_Tp, _Cmp2, _Alloc > &__source)
multimap & operator= (const multimap &)=default
Multimap assignment operator. multimap & operator=
(initializer_list< value_type > __l)
Multimap list assignment operator. multimap & operator=
(multimap &&)=default
Move assignment operator. const_reverse_iterator rbegin () const
noexcept
reverse_iterator rbegin () noexcept
const_reverse_iterator rend () const noexcept
reverse_iterator rend () noexcept
size_type size () const noexcept
void swap (multimap &__x) noexcept(/*conditional */)
Swaps data with another multimap. value_compare value_comp () const
iterator insert (const value_type &__x)
Inserts a std::pair into the multimap. iterator insert
(value_type &&__x)
Inserts a std::pair into the multimap. template<typename _Pair >
__enable_if_t< is_constructible< value_type, _Pair
>::value, iterator > insert (_Pair &&__x)
Inserts a std::pair into the multimap.
iterator insert (const_iterator __position, const value_type
&__x)
Inserts a std::pair into the multimap. iterator insert (const_iterator
__position, value_type &&__x)
Inserts a std::pair into the multimap. template<typename _Pair >
__enable_if_t< is_constructible< value_type, _Pair
&& >::value, iterator > insert (const_iterator
__position, _Pair &&__x)
Inserts a std::pair into the multimap.
iterator erase (const_iterator __position)
Erases an element from a multimap. _GLIBCXX_ABI_TAG_CXX11 iterator
erase (iterator __position)
Erases an element from a multimap.
iterator find (const key_type &__x)
Tries to locate an element in a multimap. template<typename _Kt > auto
find (const _Kt &__x) -> decltype(_M_t._M_find_tr(__x))
Tries to locate an element in a multimap.
const_iterator find (const key_type &__x) const
Tries to locate an element in a multimap. template<typename _Kt > auto
find (const _Kt &__x) const -> decltype(_M_t._M_find_tr(__x))
Tries to locate an element in a multimap.
size_type count (const key_type &__x) const
Finds the number of elements with given key. template<typename _Kt >
auto count (const _Kt &__x) const ->
decltype(_M_t._M_count_tr(__x))
Finds the number of elements with given key.
iterator lower_bound (const key_type &__x)
Finds the beginning of a subsequence matching given key. template<typename
_Kt > auto lower_bound (const _Kt &__x) ->
decltype(iterator(_M_t._M_lower_bound_tr(__x)))
Finds the beginning of a subsequence matching given key.
const_iterator lower_bound (const key_type &__x) const
Finds the beginning of a subsequence matching given key. template<typename
_Kt > auto lower_bound (const _Kt &__x) const ->
decltype(const_iterator(_M_t._M_lower_bound_tr(__x)))
Finds the beginning of a subsequence matching given key.
iterator upper_bound (const key_type &__x)
Finds the end of a subsequence matching given key. template<typename _Kt
> auto upper_bound (const _Kt &__x) ->
decltype(iterator(_M_t._M_upper_bound_tr(__x)))
Finds the end of a subsequence matching given key.
const_iterator upper_bound (const key_type &__x) const
Finds the end of a subsequence matching given key. template<typename _Kt
> auto upper_bound (const _Kt &__x) const ->
decltype(const_iterator(_M_t._M_upper_bound_tr(__x)))
Finds the end of a subsequence matching given key.
std::pair< iterator, iterator > equal_range (const
key_type &__x)
Finds a subsequence matching given key. template<typename _Kt > auto
equal_range (const _Kt &__x) -> decltype(pair<
iterator, iterator >(_M_t._M_equal_range_tr(__x)))
Finds a subsequence matching given key.
std::pair< const_iterator, const_iterator > equal_range
(const key_type &__x) const
Finds a subsequence matching given key. template<typename _Kt > auto
equal_range (const _Kt &__x) const -> decltype(pair<
const_iterator, const_iterator >(_M_t._M_equal_range_tr(__x)))
Finds a subsequence matching given key.
template<typename _K1 , typename _T1 , typename _C1 , typename
_A1 > bool operator< (const multimap< _K1, _T1, _C1,
_A1 > &, const multimap< _K1, _T1, _C1, _A1 > &)
template<typename _K1 , typename _T1 , typename _C1 , typename _A1 >
bool operator== (const multimap< _K1, _T1, _C1, _A1 >
&, const multimap< _K1, _T1, _C1, _A1 > &)
template<typename , typename > struct std::_Rb_tree_merge_helper
class std::multimap< _Key, _Tp, _Compare, _Alloc >"A standard container made up of (key,value) pairs, which can be retrieved based on a key, in logarithmic time.
Template Parameters
Meets the requirements of a container, a reversible container, and an associative container (using equivalent keys). For a multimap<Key,T> the key_type is Key, the mapped_type is T, and the value_type is std::pair<const Key,T>.
Multimaps support bidirectional iterators.
The private tree data is declared exactly the same way for map and multimap; the distinction is made entirely in how the tree functions are called (*_unique versus *_equal, same as the standard).
Definition at line 99 of file stl_multimap.h.
Definition at line 106 of file stl_multimap.h.
Definition at line 163 of file stl_multimap.h.
Definition at line 159 of file stl_multimap.h.
Definition at line 161 of file stl_multimap.h.
Definition at line 167 of file stl_multimap.h.
Definition at line 165 of file stl_multimap.h.
Definition at line 162 of file stl_multimap.h.
Definition at line 105 of file stl_multimap.h.
Definition at line 102 of file stl_multimap.h.
Definition at line 103 of file stl_multimap.h.
Definition at line 170 of file stl_multimap.h.
Definition at line 158 of file stl_multimap.h.
Definition at line 160 of file stl_multimap.h.
Definition at line 166 of file stl_multimap.h.
Definition at line 164 of file stl_multimap.h.
Definition at line 104 of file stl_multimap.h.
Default constructor creates no elements.
Creates a multimap with no elements.
Parameters
Definition at line 191 of file stl_multimap.h.
Multimap copy constructor. Whether the allocator is copied depends on the allocator traits.
Multimap move constructor. The newly-created multimap contains the exact contents of the moved instance. The moved instance is a valid, but unspecified multimap.
Builds a multimap from an initializer_list.
Parameters
Create a multimap consisting of copies of the elements from the initializer_list. This is linear in N if the list is already sorted, and NlogN otherwise (where N is __l.size()).
Definition at line 225 of file stl_multimap.h.
Allocator-extended default constructor.
Definition at line 233 of file stl_multimap.h.
Allocator-extended copy constructor.
Definition at line 237 of file stl_multimap.h.
Allocator-extended move constructor.
Definition at line 241 of file stl_multimap.h.
Allocator-extended initialier-list constructor.
Definition at line 247 of file stl_multimap.h.
Allocator-extended range constructor.
Definition at line 253 of file stl_multimap.h.
Builds a multimap from a range.
Parameters
Create a multimap consisting of copies of the elements from [__first,__last). This is linear in N if the range is already sorted, and NlogN otherwise (where N is distance(__first,__last)).
Definition at line 269 of file stl_multimap.h.
Builds a multimap from a range.
Parameters
Create a multimap consisting of copies of the elements from [__first,__last). This is linear in N if the range is already sorted, and NlogN otherwise (where N is distance(__first,__last)).
Definition at line 285 of file stl_multimap.h.
The dtor only erases the elements, and note 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.
Returns a read-only (constant) iterator that points to the first pair in the multimap. Iteration is done in ascending order according to the keys.
Definition at line 360 of file stl_multimap.h.
Returns a read/write iterator that points to the first pair in the multimap. Iteration is done in ascending order according to the keys.
Definition at line 351 of file stl_multimap.h.
Returns a read-only (constant) iterator that points to the first pair in the multimap. Iteration is done in ascending order according to the keys.
Definition at line 424 of file stl_multimap.h.
Returns a read-only (constant) iterator that points one past the last pair in the multimap. Iteration is done in ascending order according to the keys.
Definition at line 433 of file stl_multimap.h.
Erases all elements in a 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.
Definition at line 808 of file stl_multimap.h.
[inline]"
Finds the number of elements with given key.
Parameters
Returns
Definition at line 891 of file stl_multimap.h.
Finds the number of elements with given key.
Parameters
Returns
Definition at line 885 of file stl_multimap.h.
Returns a read-only (constant) reverse iterator that points to the last pair in the multimap. Iteration is done in descending order according to the keys.
Definition at line 442 of file stl_multimap.h.
Returns a read-only (constant) reverse iterator that points to one before the first pair in the multimap. Iteration is done in descending order according to the keys.
Definition at line 451 of file stl_multimap.h.
Build and insert a std::pair into the multimap.
Parameters
Returns
This function builds and inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted.
Insertion requires logarithmic time.
Definition at line 491 of file stl_multimap.h.
Builds and inserts a std::pair into the multimap.
Parameters
Returns
This function inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted. 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.
For more on hinting, see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints
Insertion requires logarithmic time (if the hint is not taken).
Definition at line 518 of file stl_multimap.h.
Returns true if the multimap is empty.
Definition at line 458 of file stl_multimap.h.
Returns a read-only (constant) iterator that points one past the last pair in the multimap. Iteration is done in ascending order according to the keys.
Definition at line 378 of file stl_multimap.h.
Returns a read/write iterator that points one past the last pair in the multimap. Iteration is done in ascending order according to the keys.
Definition at line 369 of file stl_multimap.h.
[inline]"
Finds a subsequence matching given key.
Parameters
Returns
This function is equivalent to
std::make_pair(c.lower_bound(val),
c.upper_bound(val))
(but is faster than making the calls separately).
Definition at line 1026 of file stl_multimap.h.
_M_t._M_equal_range_tr(__x))) [inline]"
Finds a subsequence matching given key.
Parameters
Returns
This function is equivalent to
std::make_pair(c.lower_bound(val),
c.upper_bound(val))
(but is faster than making the calls separately).
Definition at line 1053 of file stl_multimap.h.
Finds a subsequence matching given key.
Parameters
Returns
This function is equivalent to
std::make_pair(c.lower_bound(val),
c.upper_bound(val))
(but is faster than making the calls separately).
Definition at line 1020 of file stl_multimap.h.
Finds a subsequence matching given key.
Parameters
Returns
This function is equivalent to
std::make_pair(c.lower_bound(val),
c.upper_bound(val))
(but is faster than making the calls separately).
Definition at line 1047 of file stl_multimap.h.
Erases elements according to the provided key.
Parameters
Returns
This function erases all elements located by the given key from a 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.
Definition at line 739 of file stl_multimap.h.
Erases a [first,last) range of elements from a multimap.
Parameters
Returns
This function erases a sequence of elements from a 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.
Definition at line 760 of file stl_multimap.h.
Erases an element from a multimap.
Parameters
Returns
This function erases an element, pointed to by the given iterator, from a 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.
Definition at line 702 of file stl_multimap.h.
Erases an element from a multimap.
Parameters
Returns
This function erases an element, pointed to by the given iterator, from a 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.
Definition at line 708 of file stl_multimap.h.
Extract a node.
Definition at line 640 of file stl_multimap.h.
Extract a node.
Definition at line 632 of file stl_multimap.h.
[inline]"
Tries to locate an element in a multimap.
Parameters
Returns
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 pair. If unsuccessful it returns the past-the-end ( end() ) iterator.
Definition at line 849 of file stl_multimap.h.
[inline]"
Tries to locate an element in a multimap.
Parameters
Returns
This function takes a key and tries to locate the element with which the key matches. If successful the function returns a constant iterator pointing to the sought after pair. If unsuccessful it returns the past-the-end ( end() ) iterator.
Definition at line 873 of file stl_multimap.h.
Tries to locate an element in a multimap.
Parameters
Returns
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 pair. If unsuccessful it returns the past-the-end ( end() ) iterator.
Definition at line 843 of file stl_multimap.h.
Tries to locate an element in a multimap.
Parameters
Returns
This function takes a key and tries to locate the element with which the key matches. If successful the function returns a constant iterator pointing to the sought after pair. If unsuccessful it returns the past-the-end ( end() ) iterator.
Definition at line 867 of file stl_multimap.h.
Get a copy of the memory allocation object.
Definition at line 341 of file stl_multimap.h.
A template function that attempts to insert a range of elements.
Parameters
Complexity similar to that of the range constructor.
Definition at line 613 of file stl_multimap.h.
Inserts a std::pair into the multimap.
Parameters
Returns
This function inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted.
Insertion requires logarithmic time.
Definition at line 551 of file stl_multimap.h.
Inserts a std::pair into the multimap.
Parameters
Returns
This function inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted.
Insertion requires logarithmic time.
Definition at line 539 of file stl_multimap.h.
Referenced by std::multimap< _Key, _Tp, _Compare, _Alloc >::insert().
Re-insert an extracted node.
Definition at line 650 of file stl_multimap.h.
References std::move().
Inserts a std::pair into the multimap.
Parameters
Returns
This function inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted. 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.
For more on hinting, see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints
Insertion requires logarithmic time (if the hint is not taken).
Definition at line 594 of file stl_multimap.h.
Inserts a std::pair into the multimap.
Parameters
Returns
This function inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted. 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.
For more on hinting, see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints
Insertion requires logarithmic time (if the hint is not taken).
Definition at line 579 of file stl_multimap.h.
Inserts a std::pair into the multimap.
Parameters
Returns
This function inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted. 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.
For more on hinting, see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints
Insertion requires logarithmic time (if the hint is not taken).
Definition at line 589 of file stl_multimap.h.
References std::move().
Attempts to insert a list of std::pairs into the multimap.
Parameters
Complexity similar to that of the range constructor.
Definition at line 625 of file stl_multimap.h.
References std::multimap< _Key, _Tp, _Compare, _Alloc >::insert().
Re-insert an extracted node.
Definition at line 645 of file stl_multimap.h.
References std::move().
Inserts a std::pair into the multimap.
Parameters
Returns
This function inserts a (key, value) pair into the multimap. Contrary to a std::map the multimap does not rely on unique keys and thus multiple pairs with the same key can be inserted.
Insertion requires logarithmic time.
Definition at line 546 of file stl_multimap.h.
References std::move().
Returns the key comparison object out of which the multimap was constructed.
Definition at line 817 of file stl_multimap.h.
[inline]"
Finds the beginning of a subsequence matching given key.
Parameters
Returns
This function returns the first element of a subsequence of elements that matches the given key. If unsuccessful it returns an iterator pointing to the first element that has a greater value than given key or end() if no such element exists.
Definition at line 934 of file stl_multimap.h.
[inline]"
Finds the beginning of a subsequence matching given key.
Parameters
Returns
This function returns the first element of a subsequence of elements that matches the given key. If unsuccessful the iterator will point to the next greatest element or, if no such greater element exists, to end().
Definition at line 959 of file stl_multimap.h.
Finds the beginning of a subsequence matching given key.
Parameters
Returns
This function returns the first element of a subsequence of elements that matches the given key. If unsuccessful it returns an iterator pointing to the first element that has a greater value than given key or end() if no such element exists.
Definition at line 928 of file stl_multimap.h.
Finds the beginning of a subsequence matching given key.
Parameters
Returns
This function returns the first element of a subsequence of elements that matches the given key. If unsuccessful the iterator will point to the next greatest element or, if no such greater element exists, to end().
Definition at line 953 of file stl_multimap.h.
Returns the maximum size of the multimap.
Definition at line 468 of file stl_multimap.h.
Definition at line 679 of file stl_multimap.h.
Definition at line 671 of file stl_multimap.h.
Definition at line 666 of file stl_multimap.h.
Definition at line 658 of file stl_multimap.h.
Multimap assignment operator. Whether the allocator is copied depends on the allocator traits.
Multimap list assignment operator.
Parameters
This function fills a multimap with copies of the elements in the initializer list __l.
Note that the assignment completely changes the multimap and that the resulting multimap's size is the same as the number of elements assigned.
Definition at line 332 of file stl_multimap.h.
Move assignment operator.
Returns a read-only (constant) reverse iterator that points to the last pair in the multimap. Iteration is done in descending order according to the keys.
Definition at line 396 of file stl_multimap.h.
Returns a read/write reverse iterator that points to the last pair in the multimap. Iteration is done in descending order according to the keys.
Definition at line 387 of file stl_multimap.h.
Returns a read-only (constant) reverse iterator that points to one before the first pair in the multimap. Iteration is done in descending order according to the keys.
Definition at line 414 of file stl_multimap.h.
Returns a read/write reverse iterator that points to one before the first pair in the multimap. Iteration is done in descending order according to the keys.
Definition at line 405 of file stl_multimap.h.
Returns the size of the multimap.
Definition at line 463 of file stl_multimap.h.
Swaps data with another multimap.
Parameters
This exchanges the elements between two multimaps in constant time. (It is only swapping a pointer, an integer, and an instance of the Compare type (which itself is often stateless and empty), so it should be quite fast.) Note that the global std::swap() function is specialized such that std::swap(m1,m2) will feed to this function.
Whether the allocators are swapped depends on the allocator traits.
Definition at line 797 of file stl_multimap.h.
[inline]"
Finds the end of a subsequence matching given key.
Parameters
Returns
Definition at line 979 of file stl_multimap.h.
[inline]"
Finds the end of a subsequence matching given key.
Parameters
Returns
Definition at line 999 of file stl_multimap.h.
Finds the end of a subsequence matching given key.
Parameters
Returns
Definition at line 973 of file stl_multimap.h.
Finds the end of a subsequence matching given key.
Parameters
Returns
Definition at line 993 of file stl_multimap.h.
Returns a value comparison object, built from the key comparison object out of which the multimap was constructed.
Definition at line 825 of file stl_multimap.h.
Definition at line 654 of file stl_multimap.h.
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