std::move_iterator — cppreference.com

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Déclaré dans l'en-tête `<iterator>`
`template <class Iterator> class move_iterator`		(depuis C++11)

std::move_iterator est un adaptateur itérateur qui se comporte exactement comme l'itérateur sous-jacente (qui doit être d'au moins un InputIterator), sauf que le déréférencement convertit la valeur retournée par l'itérateur sous-jacent dans une rvalue. Si cet itérateur est utilisé comme un itérateur d'entrée, l'effet est que les valeurs sont déplacés d', plutôt que de copier de .

Original:

std::move_iterator is an iterator adaptor which behaves exactly like the underlying iterator (which must be at least an InputIterator), except that dereferencing converts the value returned by the underlying iterator into an rvalue. If this iterator is used as an input iterator, the effect is that the values are moved from, rather than copied from.

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Types de membres


Type du membre	Définition

`iterator_type`	`Iterator`

`difference_type`	`std::iterator_traits<Iterator>::difference_type`

`pointer`	`Iterator`

`value_type`	`std::iterator_traits<Iterator>::value_type`

`iterator_category`	`std::iterator_traits<Iterator>::iterator_category`

`reference`	`value_type&&`

Fonctions membres


(constructeur)	construit un nouvel itérateur adaptateur Original: constructs a new iterator adaptor The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) [edit]

operator=	assigne un autre itérateur Original: assigns another iterator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) [edit]

base	accède à l'itérateur sous-jacent Original: accesses the underlying iterator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) [edit]

operator* operator->	accède à l'élément pointé vers Original: accesses the pointed-to element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) [edit]

operator[]	obtient de référence rvalue à l'élément indexé Original: obtains rvalue reference to indexed element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) [edit]

operator++ operator++(int) operator+= operator+ operator-- operator--(int) operator-= operator-	avances ou décrémente l'itérateur Original: advances or decrements the iterator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique) [edit]

Fonctions annexes


operator== operator!= operator< operator<= operator> operator>=	compare les itérateurs sous-jacents Original: compares the underlying iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) [edit]

operator+	progrès de l'itérateur Original: advances the iterator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) [edit]

operator-	calcule la distance entre deux adaptateurs itérateur Original: computes the distance between two iterator adaptors The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) [edit]

Exemple

#include <iostream>
#include <algorithm>
#include <vector>
#include <iterator>
#include <numeric>
int main()
{
    std::vector<std::string> v{"this", "is", "an", "example"};

    std::cout << "Old contents of the vector: ";
    for(auto& s : v)
        std::cout << '"' << s << "\" ";

    typedef std::vector<std::string>::iterator iter_t;
    std::string concat = std::accumulate(
                             std::move_iterator<iter_t>(v.begin()),
                             std::move_iterator<iter_t>(v.end()),
                             std::string());  // Can be simplified with std::make_move_iterator

    std::cout << "\nConcatenated as string: " << concat << '\n'
              << "New contents of the vector: ";
    for(auto& s : v)
        std::cout << '"' << s << "\" ";
    std::cout << '\n';
}

Résultat :

Old contents of the vector: "this" "is" "an" "example"
Concatenated as string: thisisanexample
New contents of the vector: "" "" "" ""

Voir aussi


	crée un std::move_iterator de type inféré à partir de l'argument Original: creates a std::move_iterator of type inferred from the argument The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction générique) [edit]