Espaces de noms
Variantes
Affichages
Actions

std::map::operator=

De cppreference.com
< cpp‎ | container‎ | map

 
 
 
std::map
Les fonctions membres
Original:
Member functions
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::map
map::~map
map::operator=
map::get_allocator
Elément d'accès
Original:
Element access
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::at
map::operator[]
Les itérateurs
Original:
Iterators
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::begin
map::cbegin

(C++11)
map::end
map::cend

(C++11)
map::rbegin
map::crbegin

(C++11)
map::rend
map::crend

(C++11)
Capacité
Original:
Capacity
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::empty
map::size
map::max_size
Modificateurs
Original:
Modifiers
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::clear
map::insert
map::emplace (C++11)
map::emplace_hint (C++11)
map::erase
map::swap
Lookup
Original:
Lookup
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::count
map::find
map::equal_range
map::lower_bound
map::upper_bound
Des observateurs
Original:
Observers
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
map::key_comp
map::value_comp
 
map& operator=( const map& other );
(1)
map& operator=( map&& other );
(2) (depuis C++11)
Remplace le contenu du récipient .
Original:
Replaces the contents of the container.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
1)
Copiez opérateur d'affectation. Remplace le contenu d'une copie du contenu de other .
Original:
Copy assignment operator. Replaces the contents with a copy of the contents of other.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
2)
Déplacez opérateur d'affectation. Remplace le contenu avec ceux de other en utilisant la sémantique de déplacement (c'est à dire les données dans other est déplacé d'other dans ce récipient). other est dans un état valide, mais non précisées par la suite .
Original:
Move assignment operator. Replaces the contents with those of other using move semantics (i.e. the data in other is moved from other into this container). other is in valid, but unspecified state afterwards.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

Sommaire

[modifier] Paramètres

other -
un autre récipient pour être utilisé en tant que source
Original:
another container to be used as source
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[modifier] Retourne la valeur

*this

[modifier] Complexité

1)
Linéaire à la taille du récipient .
Original:
Linear in the size of the container.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
2)
Constant .
Original:
Constant.
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

[modifier] Exemple

Le code suivant utilise d'affecter un std::map à l'autre:
Original:
The following code uses to assign one std::map to another:
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.

#include <map>
#include <iostream>
 
void display_sizes(const std::map<int, int> &nums1,
                   const std::map<int, int> &nums2,
                   const std::map<int, int> &nums3)
{
    std::cout << "nums1: " << nums1.size() 
              << " nums2: " << nums2.size()
              << " nums3: " << nums3.size() << '\n';
}
 
int main()
{
    std::map<int, int> nums1 {{3, 1}, {4, 1}, {5, 9}};
    std::map<int, int> nums2;
    std::map<int, int> nums3;
 
    std::cout << "Initially:\n";
    display_sizes(nums1, nums2, nums3);
 
    // copy assignment copies data from nums1 to nums2
    nums2 = nums1;
 
    std::cout << "After assigment:\n"; 
    display_sizes(nums1, nums2, nums3);
 
    // move assignment moves data from nums1 to nums3,
    // modifying both nums1 and nums3
    nums3 = std::move(nums1);
 
    std::cout << "After move assigment:\n"; 
    display_sizes(nums1, nums2, nums3);
}

Résultat :

Initially:
nums1: 4 nums2: 0 nums3: 0
After assigment:
nums1: 4 nums2: 4 nums3: 0
After move assigment:
nums1: 0 nums2: 4 nums3: 4

[modifier] Voir aussi

Construit le map
(fonction membre publique) [edit]