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std::vector::operator=

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< cpp‎ | container‎ | vector

 
 
 
std::vector
Les fonctions membres
Original:
Member functions
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vector::vector
vector::~vector
vector::operator=
vector::assign
vector::get_allocator
Elément d'accès
Original:
Element access
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vector::at
vector::operator[]
vector::front
vector::back
vector::data (C++11)
Les itérateurs
Original:
Iterators
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vector::begin
vector::cbegin

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

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

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

(C++11)
Capacité
Original:
Capacity
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vector::empty
vector::size
vector::max_size
vector::reserve
vector::capacity
vector::shrink_to_fit (C++11)
Modificateurs
Original:
Modifiers
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vector::clear
vector::insert
vector::emplace (C++11)
vector::erase
vector::push_back
vector::emplace_back (C++11)
vector::pop_back
vector::resize
vector::swap
 
vector& operator=( const vector& other );
(1)
vector& operator=( vector&& other );
(2) (depuis C++11)
Remplace le contenu du récipient .
Original:
Replaces the contents of the container.
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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.
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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.
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Sommaire

[modifier] Paramètres

other -
un autre récipient pour être utilisé en tant que source
Original:
another container to be used as source
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[modifier] Retourne la valeur

*this

[modifier] Complexité

1)
Linéaire à la taille du récipient .
Original:
Linear in the size of the container.
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2)
Constant .
Original:
Constant.
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[modifier] Exemple

Le code suivant utilise d'affecter un std::vector à l'autre:
Original:
The following code uses to assign one std::vector to another:
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#include <vector>
#include <iostream>
 
void display_sizes(const std::vector<int> &nums1,
                   const std::vector<int> &nums2,
                   const std::vector<int> &nums3)
{
    std::cout << "nums1: " << nums1.size() 
              << " nums2: " << nums2.size()
              << " nums3: " << nums3.size() << '\n';
}
 
int main()
{
    std::vector<int> nums1 {3, 1, 4, 6, 5, 9};
    std::vector<int> nums2; 
    std::vector<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 vector
(fonction membre publique) [edit]

Attribue les valeurs dans le conteneur
(fonction membre publique) [edit]