std::unordered_map::operator=
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| unordered_map& operator=( const unordered_map& other ); |
(1) | (depuis C++11) |
| unordered_map& operator=( unordered_map&& other ); |
(2) | (depuis C++11) |
Remplace le contenu du récipient .
1) Original:
Replaces the contents of the container.
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Copiez opérateur d'affectation. Remplace le contenu d'une copie du contenu de
2) 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.
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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.
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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 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 .
2) Original:
Linear in the size of the container.
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Constant .
Original:
Constant.
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[modifier] Exemple
Le code suivant utilise
Original:
The following code uses
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#include <unordered_map> #include <iostream> void display_sizes(const std::unordered_map<int, int> &nums1, const std::unordered_map<int, int> &nums2, const std::unordered_map<int, int> &nums3) { std::cout << "nums1: " << nums1.size() << " nums2: " << nums2.size() << " nums3: " << nums3.size() << '\n'; } int main() { std::unordered_map<int, int> nums1 {{3, 1}, {4, 1}, {5, 9}}; std::unordered_map<int, int> nums2; std::unordered_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 unordered_map (fonction membre publique) | |
