libstdc++
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Public Types | |
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 |
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 |
Public Member Functions | |
map () noexcept(is_nothrow_default_constructible< allocator_type > | |
map (const _Compare &__comp, const allocator_type &__a=allocator_type()) | |
map (const map &__x) | |
map (map &&__x) noexcept(is_nothrow_copy_constructible< _Compare > | |
map (initializer_list< value_type > __l, const _Compare &__comp=_Compare(), const allocator_type &__a=allocator_type()) | |
map (const allocator_type &__a) | |
map (const map &__m, const allocator_type &__a) | |
map (map &&__m, const allocator_type &__a) noexcept(is_nothrow_copy_constructible< _Compare > | |
map (initializer_list< value_type > __l, const allocator_type &__a) | |
template<typename _InputIterator > | |
map (_InputIterator __first, _InputIterator __last, const allocator_type &__a) | |
template<typename _InputIterator > | |
map (_InputIterator __first, _InputIterator __last) | |
template<typename _InputIterator > | |
map (_InputIterator __first, _InputIterator __last, const _Compare &__comp, const allocator_type &__a=allocator_type()) | |
mapped_type & | at (const key_type &__k) |
const mapped_type & | at (const key_type &__k) const |
iterator | begin () noexcept |
const_iterator | begin () const 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> | |
std::pair< iterator, bool > | emplace (_Args &&...__args) |
template<typename... _Args> | |
iterator | emplace_hint (const_iterator __pos, _Args &&...__args) |
bool | empty () const noexcept |
iterator | end () noexcept |
const_iterator | end () const noexcept |
iterator | erase (const_iterator __position) |
_GLIBCXX_ABI_TAG_CXX11 iterator | erase (iterator __position) |
size_type | erase (const key_type &__x) |
iterator | erase (const_iterator __first, const_iterator __last) |
allocator_type | get_allocator () const noexcept |
std::pair< iterator, bool > | insert (const value_type &__x) |
template<typename _Pair , typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> | |
std::pair< iterator, bool > | insert (_Pair &&__x) |
void | insert (std::initializer_list< value_type > __list) |
iterator | insert (const_iterator __position, const value_type &__x) |
template<typename _Pair , typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> | |
iterator | insert (const_iterator __position, _Pair &&__x) |
template<typename _InputIterator > | |
void | insert (_InputIterator __first, _InputIterator __last) |
key_compare | key_comp () const |
size_type | max_size () const noexcept |
map & | operator= (const map &__x) |
map & | operator= (map &&) |
map & | operator= (initializer_list< value_type > __l) |
mapped_type & | operator[] (const key_type &__k) |
mapped_type & | operator[] (key_type &&__k) |
reverse_iterator | rbegin () noexcept |
const_reverse_iterator | rbegin () const noexcept |
reverse_iterator | rend () noexcept |
const_reverse_iterator | rend () const noexcept |
size_type | size () const noexcept |
void | swap (map &__x) noexcept(_Alloc_traits |
value_compare | value_comp () const |
iterator | find (const key_type &__x) |
template<typename _Kt > | |
auto | find (const _Kt &__x)-> decltype(_M_t._M_find_tr(__x)) |
const_iterator | find (const key_type &__x) const |
template<typename _Kt > | |
auto | find (const _Kt &__x) const -> decltype(_M_t._M_find_tr(__x)) |
size_type | count (const key_type &__x) const |
template<typename _Kt > | |
auto | count (const _Kt &__x) const -> decltype(_M_t._M_count_tr(__x)) |
iterator | lower_bound (const key_type &__x) |
template<typename _Kt > | |
auto | lower_bound (const _Kt &__x)-> decltype(_M_t._M_lower_bound_tr(__x)) |
const_iterator | lower_bound (const key_type &__x) const |
template<typename _Kt > | |
auto | lower_bound (const _Kt &__x) const -> decltype(_M_t._M_lower_bound_tr(__x)) |
iterator | upper_bound (const key_type &__x) |
template<typename _Kt > | |
auto | upper_bound (const _Kt &__x)-> decltype(_M_t._M_upper_bound_tr(__x)) |
const_iterator | upper_bound (const key_type &__x) const |
template<typename _Kt > | |
auto | upper_bound (const _Kt &__x) const -> decltype(_M_t._M_upper_bound_tr(__x)) |
std::pair< iterator, iterator > | equal_range (const key_type &__x) |
template<typename _Kt > | |
auto | equal_range (const _Kt &__x)-> decltype(_M_t._M_equal_range_tr(__x)) |
std::pair< const_iterator, const_iterator > | equal_range (const key_type &__x) const |
template<typename _Kt > | |
auto | equal_range (const _Kt &__x) const -> decltype(_M_t._M_equal_range_tr(__x)) |
Friends | |
template<typename _K1 , typename _T1 , typename _C1 , typename _A1 > | |
bool | operator< (const map< _K1, _T1, _C1, _A1 > &, const map< _K1, _T1, _C1, _A1 > &) |
template<typename _K1 , typename _T1 , typename _C1 , typename _A1 > | |
bool | operator== (const map< _K1, _T1, _C1, _A1 > &, const map< _K1, _T1, _C1, _A1 > &) |
A standard container made up of (key,value) pairs, which can be retrieved based on a key, in logarithmic time.
_Key | Type of key objects. |
_Tp | Type of mapped objects. |
_Compare | Comparison function object type, defaults to less<_Key>. |
_Alloc | Allocator type, defaults to allocator<pair<const _Key, _Tp>. |
Meets the requirements of a container, a reversible container, and an associative container (using unique keys). For a map<Key,T>
the key_type is Key, the mapped_type is T, and the value_type is std::pair<const Key,T>.
Maps 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).
std::map< _Key, _Tp, _Compare, _Alloc >::map | ( | initializer_list< value_type > | __l, |
const _Compare & | __comp = _Compare() , |
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const allocator_type & | __a = allocator_type() |
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) | [inline] |
Builds a map from an initializer_list.
__l | An initializer_list. |
__comp | A comparison object. |
__a | An allocator object. |
Create a map consisting of copies of the elements in the initializer_list __l. This is linear in N if the range is already sorted, and NlogN otherwise (where N is __l.size()).
std::map< _Key, _Tp, _Compare, _Alloc >::map | ( | initializer_list< value_type > | __l, |
const allocator_type & | __a | ||
) | [inline] |
std::map< _Key, _Tp, _Compare, _Alloc >::map | ( | _InputIterator | __first, |
_InputIterator | __last, | ||
const allocator_type & | __a | ||
) | [inline] |
std::map< _Key, _Tp, _Compare, _Alloc >::map | ( | _InputIterator | __first, |
_InputIterator | __last | ||
) | [inline] |
Builds a map from a range.
__first | An input iterator. |
__last | An input iterator. |
Create a map 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)).
std::map< _Key, _Tp, _Compare, _Alloc >::map | ( | _InputIterator | __first, |
_InputIterator | __last, | ||
const _Compare & | __comp, | ||
const allocator_type & | __a = allocator_type() |
||
) | [inline] |
Builds a map from a range.
__first | An input iterator. |
__last | An input iterator. |
__comp | A comparison functor. |
__a | An allocator object. |
Create a map 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)).
mapped_type& std::map< _Key, _Tp, _Compare, _Alloc >::at | ( | const key_type & | __k | ) | [inline] |
Access to map data.
__k | The key for which data should be retrieved. |
std::out_of_range | If no such data is present. |
Definition at line 519 of file stl_map.h.
References std::map< _Key, _Tp, _Compare, _Alloc >::end(), std::map< _Key, _Tp, _Compare, _Alloc >::key_comp(), and std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound().
size_type std::map< _Key, _Tp, _Compare, _Alloc >::count | ( | const key_type & | __x | ) | const [inline] |
Finds the number of elements with given key.
__x | Key of (key, value) pairs to be located. |
This function only makes sense for multimaps; for map the result will either be 0 (not present) or 1 (present).
auto std::map< _Key, _Tp, _Compare, _Alloc >::count | ( | const _Kt & | __x | ) | const [inline] |
Finds the number of elements with given key.
__x | Key of (key, value) pairs to be located. |
This function only makes sense for multimaps; for map the result will either be 0 (not present) or 1 (present).
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::crbegin | ( | ) | const [inline] |
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::crend | ( | ) | const [inline] |
std::pair<iterator, bool> std::map< _Key, _Tp, _Compare, _Alloc >::emplace | ( | _Args &&... | __args | ) | [inline] |
Attempts to build and insert a std::pair into the map.
__args | Arguments used to generate a new pair instance (see std::piecewise_contruct for passing arguments to each part of the pair constructor). |
This function attempts to build and insert a (key, value) pair into the map. A map relies on unique keys and thus a pair is only inserted if its first element (the key) is not already present in the map.
Insertion requires logarithmic time.
iterator std::map< _Key, _Tp, _Compare, _Alloc >::emplace_hint | ( | const_iterator | __pos, |
_Args &&... | __args | ||
) | [inline] |
Attempts to build and insert a std::pair into the map.
__pos | An iterator that serves as a hint as to where the pair should be inserted. |
__args | Arguments used to generate a new pair instance (see std::piecewise_contruct for passing arguments to each part of the pair constructor). |
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 https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints for more on hinting.
Insertion requires logarithmic time (if the hint is not taken).
iterator std::map< _Key, _Tp, _Compare, _Alloc >::end | ( | ) | [inline] |
Returns a read/write iterator that points one past the last pair in the map. Iteration is done in ascending order according to the keys.
Definition at line 356 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::at(), and std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
std::pair<iterator, iterator> std::map< _Key, _Tp, _Compare, _Alloc >::equal_range | ( | const key_type & | __x | ) | [inline] |
Finds a subsequence matching given key.
__x | Key of (key, value) pairs to be located. |
This function is equivalent to
std::make_pair(c.lower_bound(val), c.upper_bound(val))
(but is faster than making the calls separately).
This function probably only makes sense for multimaps.
auto std::map< _Key, _Tp, _Compare, _Alloc >::equal_range | ( | const _Kt & | __x | ) | [inline] |
Finds a subsequence matching given key.
__x | Key of (key, value) pairs to be located. |
This function is equivalent to
std::make_pair(c.lower_bound(val), c.upper_bound(val))
(but is faster than making the calls separately).
This function probably only makes sense for multimaps.
std::pair<const_iterator, const_iterator> std::map< _Key, _Tp, _Compare, _Alloc >::equal_range | ( | const key_type & | __x | ) | const [inline] |
Finds a subsequence matching given key.
__x | Key of (key, value) pairs to be located. |
This function is equivalent to
std::make_pair(c.lower_bound(val), c.upper_bound(val))
(but is faster than making the calls separately).
This function probably only makes sense for multimaps.
auto std::map< _Key, _Tp, _Compare, _Alloc >::equal_range | ( | const _Kt & | __x | ) | const [inline] |
Finds a subsequence matching given key.
__x | Key of (key, value) pairs to be located. |
This function is equivalent to
std::make_pair(c.lower_bound(val), c.upper_bound(val))
(but is faster than making the calls separately).
This function probably only makes sense for multimaps.
iterator std::map< _Key, _Tp, _Compare, _Alloc >::erase | ( | const_iterator | __position | ) | [inline] |
Erases an element from a map.
__position | An iterator pointing to the element to be erased. |
This function erases an element, pointed to by the given iterator, from a 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.
size_type std::map< _Key, _Tp, _Compare, _Alloc >::erase | ( | const key_type & | __x | ) | [inline] |
Erases elements according to the provided key.
__x | Key of element to be erased. |
This function erases all the elements located by the given key from a 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 std::map< _Key, _Tp, _Compare, _Alloc >::erase | ( | const_iterator | __first, |
const_iterator | __last | ||
) | [inline] |
Erases a [first,last) range of elements from a map.
__first | Iterator pointing to the start of the range to be erased. |
__last | Iterator pointing to the end of the range to be erased. |
This function erases a sequence of elements from a 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 std::map< _Key, _Tp, _Compare, _Alloc >::find | ( | const key_type & | __x | ) | [inline] |
Tries to locate an element in a map.
__x | Key of (key, value) pair to be located. |
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.
auto std::map< _Key, _Tp, _Compare, _Alloc >::find | ( | const _Kt & | __x | ) | [inline] |
Tries to locate an element in a map.
__x | Key of (key, value) pair to be located. |
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.
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::find | ( | const key_type & | __x | ) | const [inline] |
Tries to locate an element in a map.
__x | Key of (key, value) pair to be located. |
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.
auto std::map< _Key, _Tp, _Compare, _Alloc >::find | ( | const _Kt & | __x | ) | const [inline] |
Tries to locate an element in a map.
__x | Key of (key, value) pair to be located. |
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.
allocator_type std::map< _Key, _Tp, _Compare, _Alloc >::get_allocator | ( | ) | const [inline] |
std::pair<iterator, bool> std::map< _Key, _Tp, _Compare, _Alloc >::insert | ( | const value_type & | __x | ) | [inline] |
Attempts to insert a std::pair into the map.
__x | Pair to be inserted (see std::make_pair for easy creation of pairs). |
This function attempts to insert a (key, value) pair into the map. A map relies on unique keys and thus a pair is only inserted if its first element (the key) is not already present in the map.
Insertion requires logarithmic time.
Definition at line 612 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
void std::map< _Key, _Tp, _Compare, _Alloc >::insert | ( | std::initializer_list< value_type > | __list | ) | [inline] |
Attempts to insert a list of std::pairs into the map.
__list | A std::initializer_list<value_type> of pairs to be inserted. |
Complexity similar to that of the range constructor.
Definition at line 633 of file stl_map.h.
References std::map< _Key, _Tp, _Compare, _Alloc >::insert().
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::insert().
iterator std::map< _Key, _Tp, _Compare, _Alloc >::insert | ( | const_iterator | __position, |
const value_type & | __x | ||
) | [inline] |
Attempts to insert a std::pair into the map.
__position | An iterator that serves as a hint as to where the pair should be inserted. |
__x | Pair to be inserted (see std::make_pair for easy creation of pairs). |
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 https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints for more on hinting.
Insertion requires logarithmic time (if the hint is not taken).
key_compare std::map< _Key, _Tp, _Compare, _Alloc >::key_comp | ( | ) | const [inline] |
Returns the key comparison object out of which the map was constructed.
Definition at line 818 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::at(), and std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
iterator std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound | ( | const key_type & | __x | ) | [inline] |
Finds the beginning of a subsequence matching given key.
__x | Key of (key, value) pair to be located. |
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 915 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::at(), and std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
auto std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound | ( | const _Kt & | __x | ) | [inline] |
Finds the beginning of a subsequence matching given key.
__x | Key of (key, value) pair to be located. |
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.
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound | ( | const key_type & | __x | ) | const [inline] |
Finds the beginning of a subsequence matching given key.
__x | Key of (key, value) pair to be located. |
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.
auto std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound | ( | const _Kt & | __x | ) | const [inline] |
Finds the beginning of a subsequence matching given key.
__x | Key of (key, value) pair to be located. |
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.
map& std::map< _Key, _Tp, _Compare, _Alloc >::operator= | ( | const map< _Key, _Tp, _Compare, _Alloc > & | __x | ) | [inline] |
Map assignment operator.
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.
__x | A map of identical element and allocator types. |
All the elements of __x are copied, but unlike the copy constructor, the allocator object is not copied.
map& std::map< _Key, _Tp, _Compare, _Alloc >::operator= | ( | map< _Key, _Tp, _Compare, _Alloc > && | ) |
Move assignment operator.
map& std::map< _Key, _Tp, _Compare, _Alloc >::operator= | ( | initializer_list< value_type > | __l | ) | [inline] |
Map list assignment operator.
__l | An initializer_list. |
This function fills a map with copies of the elements in the initializer list __l.
Note that the assignment completely changes the map and that the resulting map's size is the same as the number of elements assigned. Old data may be lost.
mapped_type& std::map< _Key, _Tp, _Compare, _Alloc >::operator[] | ( | const key_type & | __k | ) | [inline] |
Subscript ( [] ) access to map data.
__k | The key for which data should be retrieved. |
Allows for easy lookup with the subscript ( [] ) 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 logarithmic time.
Definition at line 474 of file stl_map.h.
References std::map< _Key, _Tp, _Compare, _Alloc >::end(), std::map< _Key, _Tp, _Compare, _Alloc >::insert(), std::map< _Key, _Tp, _Compare, _Alloc >::key_comp(), std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound(), and std::piecewise_construct.
reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rbegin | ( | ) | [inline] |
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rbegin | ( | ) | const [inline] |
reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rend | ( | ) | [inline] |
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rend | ( | ) | const [inline] |
void std::map< _Key, _Tp, _Compare, _Alloc >::swap | ( | map< _Key, _Tp, _Compare, _Alloc > & | __x | ) | [inline] |
Swaps data with another map.
__x | A map of the same element and allocator types. |
This exchanges the elements between two maps 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.
Definition at line 796 of file stl_map.h.
Referenced by std::swap().
iterator std::map< _Key, _Tp, _Compare, _Alloc >::upper_bound | ( | const key_type & | __x | ) | [inline] |
auto std::map< _Key, _Tp, _Compare, _Alloc >::upper_bound | ( | const _Kt & | __x | ) | [inline] |
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::upper_bound | ( | const key_type & | __x | ) | const [inline] |
auto std::map< _Key, _Tp, _Compare, _Alloc >::upper_bound | ( | const _Kt & | __x | ) | const [inline] |
value_compare std::map< _Key, _Tp, _Compare, _Alloc >::value_comp | ( | ) | const [inline] |