std::map< _Key, _Tp, _Compare, _Alloc >(3cxx) std::map< _Key, _Tp, _Compare, _Alloc >(3cxx)
NAME
std::map< _Key, _Tp, _Compare, _Alloc > -
SYNOPSIS
Public Types
typedef _Alloc allocator_type
typedef _Rep_type::const_iterator const_iterator
typedef
_Pair_alloc_type::const_pointer const_pointer"
typedef
_Pair_alloc_type::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 _Pair_alloc_type::pointer pointer
typedef _Pair_alloc_type::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 ()
map (const _Compare &__comp, const allocator_type &__a=allocator_type())
map (const map &__x)
map (map &&__x)
map (initializer_list< value_type > __l, const _Compare &__c=_Compare(), const allocator_type &__a=allocator_type())
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 ()
const_iterator begin () const
const_iterator cbegin () const
const_iterator cend () const
void clear ()
size_type count (const key_type &__x) const
const_reverse_iterator crbegin () const
const_reverse_iterator crend () const
bool empty () const
iterator end ()
const_iterator end () const
std::pair< iterator, iterator > equal_range (const key_type &__x)
std::pair< const_iterator,
const_iterator > equal_range (const key_type &__x) const "
iterator erase (const_iterator __position)
iterator erase (iterator __position)
size_type erase (const key_type &__x)
iterator erase (const_iterator __first, const_iterator __last)
iterator find (const key_type &__x)
const_iterator find (const key_type &__x) const
allocator_type get_allocator () const
std::pair< iterator, bool > insert (const value_type &__x)
template<typename _Pair , typename = typename std::enable_if<std::is_convertible<_Pair,
value_type>::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_convertible<_Pair,
value_type>::value>::type> iterator insert (const_iterator __position, _Pair &&__x)
template<typename _InputIterator > void insert (_InputIterator __first, _InputIterator __last)
key_compare key_comp () const
iterator lower_bound (const key_type &__x)
const_iterator lower_bound (const key_type &__x) const
size_type max_size () const
map & operator= (const map &__x)
map & operator= (map &&__x)
map & operator= (initializer_list< value_type > __l)
mapped_type & operator[] (const key_type &__k)
mapped_type & operator[] (key_type &&__k)
reverse_iterator rbegin ()
const_reverse_iterator rbegin () const
reverse_iterator rend ()
const_reverse_iterator rend () const
size_type size () const
void swap (map &__x)
iterator upper_bound (const key_type &__x)
const_iterator upper_bound (const key_type &__x) const
value_compare value_comp () const
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 > &)
Detailed Description
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>class
std::map< _Key, _Tp, _Compare, _Alloc >
A standard container made up of (key,value) pairs, which can be retrieved based on a key, in logarithmic time.
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).
Definition at line 88 of file stl_map.h.
Constructor &; Destructor Documentation
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
std::map< _Key, _Tp, _Compare, _Alloc >::map () [inline]
Default constructor creates no elements.
Definition at line 152 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
std::map< _Key, _Tp, _Compare, _Alloc >::map (const _Compare &__comp, const allocator_type &__a = allocator_type()) [inline], [explicit]
Creates a map with no elements. Parameters:
comp A comparison object.
a An allocator object.
Definition at line 161 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
std::map< _Key, _Tp, _Compare, _Alloc >::map (const map< _Key, _Tp, _Compare, _Alloc > &__x) [inline]
Map copy constructor. Parameters:
x A map of identical element and allocator types.
The newly-created map uses a copy of the allocation object used by x.
Definition at line 172 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
std::map< _Key, _Tp, _Compare, _Alloc >::map (map< _Key, _Tp, _Compare, _Alloc > &&__x) [inline]
Map move constructor. Parameters:
x A map of identical element and allocator types.
The newly-created map contains the exact contents of x. The contents of x are a valid, but unspecified map.
Definition at line 183 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
std::map< _Key, _Tp, _Compare, _Alloc >::map (initializer_list< value_type >__l, const _Compare &__c = _Compare(), const allocator_type
&__a = allocator_type()) [inline]
Builds a map from an initializer_list. Parameters:
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()).
Definition at line 197 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
template<typename _InputIterator > std::map< _Key, _Tp, _Compare, _Alloc >::map (_InputIterator__first, _InputIterator__last) [inline]
Builds a map from a range. Parameters:
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)).
Definition at line 214 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
template<typename _InputIterator > 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. Parameters:
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)).
Definition at line 230 of file stl_map.h.
Member Function Documentation
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
mapped_type& std::map< _Key, _Tp, _Compare, _Alloc >::at (const key_type &__k) [inline]
Access to map data. Parameters:
k The key for which data should be retrieved.
Returns:
A reference to the data whose key is equivalent to k, if such a data is present in the map.
Exceptions:
std::out_of_range If no such data is present.
Definition at line 482 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().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
iterator std::map< _Key, _Tp, _Compare, _Alloc >::begin () [inline]
Returns a read/write iterator that points to the first pair in the map. Iteration is done in ascending order according to the keys.
Definition at line 309 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::begin () const [inline]
Returns a read-only (constant) iterator that points to the first pair in the map. Iteration is done in ascending order according to the
keys.
Definition at line 318 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::cbegin () const [inline]
Returns a read-only (constant) iterator that points to the first pair in the map. Iteration is done in ascending order according to the
keys.
Definition at line 382 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::cend () const [inline]
Returns a read-only (constant) iterator that points one past the last pair in the map. Iteration is done in ascending order according to
the keys.
Definition at line 391 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >> void
std::map< _Key, _Tp, _Compare, _Alloc >::clear () [inline]
Erases all elements in a 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.
Definition at line 708 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::operator=().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
size_type std::map< _Key, _Tp, _Compare, _Alloc >::count (const key_type &__x) const [inline]
Finds the number of elements with given key. Parameters:
x Key of (key, value) pairs to be located.
Returns:
Number of elements with specified key.
This function only makes sense for multimaps; for map the result will either be 0 (not present) or 1 (present).
Definition at line 768 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::crbegin () const [inline]
Returns a read-only (constant) reverse iterator that points to the last pair in the map. Iteration is done in descending order according to
the keys.
Definition at line 400 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::crend () const [inline]
Returns a read-only (constant) reverse iterator that points to one before the first pair in the map. Iteration is done in descending order
according to the keys.
Definition at line 409 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >> bool
std::map< _Key, _Tp, _Compare, _Alloc >::empty () const [inline]
Returns true if the map is empty. (Thus begin() would equal end().)
Definition at line 418 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
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 327 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::at(), and std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::end () const [inline]
Returns a read-only (constant) iterator that points one past the last pair in the map. Iteration is done in ascending order according to
the keys.
Definition at line 336 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
std::pair<iterator, iterator> std::map< _Key, _Tp, _Compare, _Alloc >::equal_range (const key_type &__x) [inline]
Finds a subsequence matching given key. Parameters:
x Key of (key, value) pairs to be located.
Returns:
Pair of iterators that possibly points to the subsequence matching given key.
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.
Definition at line 837 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
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. Parameters:
x Key of (key, value) pairs to be located.
Returns:
Pair of read-only (constant) iterators that possibly points to the subsequence matching given key.
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.
Definition at line 856 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
iterator std::map< _Key, _Tp, _Compare, _Alloc >::erase (const_iterator__position) [inline]
Erases an element from a map. Parameters:
position An iterator pointing to the element to be erased.
Returns:
An iterator pointing to the element immediately following 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 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.
Definition at line 613 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
size_type std::map< _Key, _Tp, _Compare, _Alloc >::erase (const key_type &__x) [inline]
Erases elements according to the provided key. Parameters:
x Key of element to be erased.
Returns:
The number of elements 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.
Definition at line 648 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
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. Parameters:
first Iterator pointing to the start of the range to be erased.
last Iterator pointing to the end of the range to be erased.
Returns:
The iterator last.
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.
Definition at line 667 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
iterator std::map< _Key, _Tp, _Compare, _Alloc >::find (const key_type &__x) [inline]
Tries to locate an element in a map. Parameters:
x Key of (key, value) pair to be located.
Returns:
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 pair. If unsuccessful it returns the past-the-end ( end() ) iterator.
Definition at line 741 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::find (const key_type &__x) const [inline]
Tries to locate an element in a map. Parameters:
x Key of (key, value) pair to be located.
Returns:
Read-only (constant) 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 a constant
iterator pointing to the sought after pair. If unsuccessful it returns the past-the-end ( end() ) iterator.
Definition at line 756 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
allocator_type std::map< _Key, _Tp, _Compare, _Alloc >::get_allocator () const [inline]
Get a copy of the memory allocation object.
Definition at line 299 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
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. Parameters:
x Pair to be inserted (see std::make_pair for easy creation of pairs).
Returns:
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 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 517 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::operator=(), and std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >> 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. Parameters:
list A std::initializer_list<value_type> of pairs to be inserted.
Complexity similar to that of the range constructor.
Definition at line 538 of file stl_map.h.
References std::map< _Key, _Tp, _Compare, _Alloc >::insert().
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::insert().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
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. Parameters:
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).
Returns:
An iterator that points to the element with key of 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 hinting.
Insertion requires logarithmic time (if the hint is not taken).
Definition at line 567 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
template<typename _InputIterator > void std::map< _Key, _Tp, _Compare, _Alloc >::insert (_InputIterator__first, _InputIterator__last)
[inline]
Template function that attempts to insert a range of elements. Parameters:
first Iterator pointing to the start of the range to be inserted.
last Iterator pointing to the end of the range.
Complexity similar to that of the range constructor.
Definition at line 593 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
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 717 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::at(), and std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
iterator std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound (const key_type &__x) [inline]
Finds the beginning of a subsequence matching given key. Parameters:
x Key of (key, value) pair to be located.
Returns:
Iterator pointing to first element equal to or greater than key, or end().
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 783 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::at(), and std::map< _Key, _Tp, _Compare, _Alloc >::operator[]().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
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. Parameters:
x Key of (key, value) pair to be located.
Returns:
Read-only (constant) iterator pointing to first element equal to or greater than key, or end().
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 798 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
size_type std::map< _Key, _Tp, _Compare, _Alloc >::max_size () const [inline]
Returns the maximum size of the map.
Definition at line 428 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >> 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.
Parameters:
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.
Definition at line 253 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >> map&
std::map< _Key, _Tp, _Compare, _Alloc >::operator= (map< _Key, _Tp, _Compare, _Alloc > &&__x) [inline]
Map move assignment operator. Parameters:
x A map of identical element and allocator types.
The contents of x are moved into this map (without copying). x is a valid, but unspecified map.
Definition at line 268 of file stl_map.h.
References std::map< _Key, _Tp, _Compare, _Alloc >::clear(), and std::map< _Key, _Tp, _Compare, _Alloc >::swap().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >> map&
std::map< _Key, _Tp, _Compare, _Alloc >::operator= (initializer_list< value_type >__l) [inline]
Map list assignment operator. Parameters:
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.
Definition at line 289 of file stl_map.h.
References std::map< _Key, _Tp, _Compare, _Alloc >::clear(), and std::map< _Key, _Tp, _Compare, _Alloc >::insert().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
mapped_type& std::map< _Key, _Tp, _Compare, _Alloc >::operator[] (const key_type &__k) [inline]
Subscript ( [] ) access to map data. Parameters:
k The key for which data should be retrieved.
Returns:
A reference to the data of the (key,data) pair.
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 445 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(), and std::map< _Key, _Tp, _Compare, _Alloc >::lower_bound().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rbegin () [inline]
Returns a read/write reverse iterator that points to the last pair in the map. Iteration is done in descending order according to the keys.
Definition at line 345 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rbegin () const [inline]
Returns a read-only (constant) reverse iterator that points to the last pair in the map. Iteration is done in descending order according to
the keys.
Definition at line 354 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rend () [inline]
Returns a read/write reverse iterator that points to one before the first pair in the map. Iteration is done in descending order according
to the keys.
Definition at line 363 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_reverse_iterator std::map< _Key, _Tp, _Compare, _Alloc >::rend () const [inline]
Returns a read-only (constant) reverse iterator that points to one before the first pair in the map. Iteration is done in descending order
according to the keys.
Definition at line 372 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
size_type std::map< _Key, _Tp, _Compare, _Alloc >::size () const [inline]
Returns the size of the map.
Definition at line 423 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >> void
std::map< _Key, _Tp, _Compare, _Alloc >::swap (map< _Key, _Tp, _Compare, _Alloc > &__x) [inline]
Swaps data with another map. Parameters:
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 698 of file stl_map.h.
Referenced by std::map< _Key, _Tp, _Compare, _Alloc >::operator=(), and std::swap().
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
iterator std::map< _Key, _Tp, _Compare, _Alloc >::upper_bound (const key_type &__x) [inline]
Finds the end of a subsequence matching given key. Parameters:
x Key of (key, value) pair to be located.
Returns:
Iterator pointing to the first element greater than key, or end().
Definition at line 808 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
const_iterator std::map< _Key, _Tp, _Compare, _Alloc >::upper_bound (const key_type &__x) const [inline]
Finds the end of a subsequence matching given key. Parameters:
x Key of (key, value) pair to be located.
Returns:
Read-only (constant) iterator pointing to first iterator greater than key, or end().
Definition at line 818 of file stl_map.h.
template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> >>
value_compare std::map< _Key, _Tp, _Compare, _Alloc >::value_comp () const [inline]
Returns a value comparison object, built from the key comparison object out of which the map was constructed.
Definition at line 725 of file stl_map.h.
Author
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libstdc++ Tue Nov 27 2012 std::map< _Key, _Tp, _Compare, _Alloc >(3cxx)