fonctions<unordered_map>

L’en-tête <unordered_map> fournit les fonctions suivantes :

échange (unordered_map)

Échange le contenu de deux conteneurs.

template <class Key, class Ty, class Hash, class Pred, class Alloc>
void swap(
    unordered_map <Key, Ty, Hash, Pred, Alloc>& left,
    unordered_map <Key, Ty, Hash, Pred, Alloc>& right);

Paramètres

Clé
Type de clé.

Ty
Type mappé.

de hachage
Type d’objet de la fonction de hachage.

Pred
Type d’objet de fonction de comparaison d’égalité.

Alloc
Classe allocator.

gauche
Premier conteneur à échanger.

Droite
Second conteneur à échanger.

Notes

La fonction de modèle exécute left.unordered_map::swap(right).

Exemple

// std__unordered_map__u_m_swap.cpp
// compile with: /EHsc
#include <unordered_map>
#include <iostream>

typedef std::unordered_map<char, int> Mymap;
int main()
    {
    Mymap c1;

    c1.insert(Mymap::value_type('a', 1));
    c1.insert(Mymap::value_type('b', 2));
    c1.insert(Mymap::value_type('c', 3));

// display contents " [c 3] [b 2] [a 1]"
    for (Mymap::const_iterator it = c1.begin();
        it != c1.end(); ++it)
        std::cout << " [" << it->first << ", " << it->second << "]";
    std::cout << std::endl;

    Mymap c2;

    c2.insert(Mymap::value_type('d', 4));
    c2.insert(Mymap::value_type('e', 5));
    c2.insert(Mymap::value_type('f', 6));

    c1.swap(c2);

// display contents " [f 6] [e 5] [d 4]"
    for (Mymap::const_iterator it = c1.begin();
        it != c1.end(); ++it)
        std::cout << " [" << it->first << ", " << it->second << "]";
    std::cout << std::endl;

    swap(c1, c2);

// display contents " [c 3] [b 2] [a 1]"
    for (Mymap::const_iterator it = c1.begin();
        it != c1.end(); ++it)
        std::cout << " [" << it->first << ", " << it->second << "]";
    std::cout << std::endl;

    return (0);
    }

[c, 3] [b, 2] [a, 1]
[f, 6] [e, 5] [d, 4]
[c, 3] [b, 2] [a, 1]

échange (unordered_multimap)

Échange le contenu de deux conteneurs.

template <class Key, class Ty, class Hash, class Pred, class Alloc>
void swap(
    unordered_multimap <Key, Ty, Hash, Pred, Alloc>& left,
    unordered_multimap <Key, Ty, Hash, Pred, Alloc>& right);

Paramètres

Clé
Type de clé.

Ty
Type mappé.

de hachage
Type d’objet de la fonction de hachage.

Pred
Type d’objet de fonction de comparaison d’égalité.

Alloc
Classe allocator.

gauche
Premier conteneur à échanger.

Droite
Second conteneur à échanger.

Notes

La fonction de modèle exécute left.unordered_multimap::swap(right).

Exemple

// std__unordered_map__u_mm_swap.cpp
// compile with: /EHsc
#include <unordered_map>
#include <iostream>

typedef std::unordered_multimap<char, int> Mymap;
int main()
{
    Mymap c1;

    c1.insert(Mymap::value_type('a', 1));
    c1.insert(Mymap::value_type('b', 2));
    c1.insert(Mymap::value_type('c', 3));

    // display contents " [c 3] [b 2] [a 1]"
    for (Mymap::const_iterator it = c1.begin();
        it != c1.end(); ++it)
        std::cout << " [" << it->first << ", " << it->second << "]";
    std::cout << std::endl;

    Mymap c2;

    c2.insert(Mymap::value_type('d', 4));
    c2.insert(Mymap::value_type('e', 5));
    c2.insert(Mymap::value_type('f', 6));

    c1.swap(c2);

    // display contents " [f 6] [e 5] [d 4]"
    for (Mymap::const_iterator it = c1.begin();
        it != c1.end(); ++it)
        std::cout << " [" << it->first << ", " << it->second << "]";
    std::cout << std::endl;

    swap(c1, c2);

    // display contents " [c 3] [b 2] [a 1]"
    for (Mymap::const_iterator it = c1.begin();
        it != c1.end(); ++it)
        std::cout << " [" << it->first << ", " << it->second << "]";
    std::cout << std::endl;

    return (0);
}

[c, 3] [b, 2] [a, 1]
[f, 6] [e, 5] [d, 4]
[c, 3] [b, 2] [a, 1]

Voir aussi

<unordered_map>