std::move_iterator – cppreference.com

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definiert in Header `<iterator>`

`template <class Iterator> class move_iterator`		(seit C++11)

std::move_iterator ist ein Iterator-Adapter, der genau wie die zugrundeliegenden Iterator (welche mindestens eine InputIterator sein) verhält, wobei jedoch Dereferenzierung wandelt den Wert des zugrundeliegenden Iterator in einen R-Wert zurückgeführt. Wenn dies Iterator als Eingang Iterator verwendet wird, ist der Effekt, dass die Werte aus bewegt werden, anstatt kopiert .

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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Mitglied Typen


Mitglied Typ Original: Member type The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.	Definition

`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&&`

Member-Funktionen


(constructor)	baut einen neuen Iterator-Adapter 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. (öffentliche Elementfunktion) [edit]

operator=	ordnet eine andere Iterator 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. (öffentliche Elementfunktion) [edit]

base	greift auf die zugrunde liegenden Iterator 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. (öffentliche Elementfunktion) [edit]

operator* operator->	greift auf die spitzen-to-Element 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. (öffentliche Elementfunktion) [edit]

operator[]	erhält rvalue Bezug auf indizierte Element 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. (öffentliche Elementfunktion) [edit]

operator++ operator++(int) operator+= operator+ operator-- operator--(int) operator-= operator-	Vorschüsse oder dekrementiert den Iterator 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. (öffentliche Elementfunktion) [edit]

Non-Member-Funktionen


operator== operator!= operator< operator<= operator> operator>=	vergleicht die zugrunde liegenden Iteratoren 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. (Funktions-Template) [edit]

operator+	Fortschritte der Iterator 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. (Funktions-Template) [edit]

operator-	berechnet den Abstand zwischen zwei Iterator Adaptern 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. (Funktions-Template) [edit]

Beispiel

#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';
}

Output:

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

Siehe auch


	schafft eine std::move_iterator des Typs aus dem Argument abgeleitet 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. (Funktions-Template) [edit]