Namespace
Varianti

std::move

Da cppreference.com.
< cpp‎ | algorithm

 
 
Algoritmo libreria
Funzioni
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Functions
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Non modifica le operazioni di sequenza
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Non-modifying sequence operations
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Modifica delle operazioni di sequenza
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Modifying sequence operations
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Partizionamento operazioni
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Partitioning operations
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Ordinamento delle operazioni (su intervalli ordinati)
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Sorting operations (on sorted ranges)
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Binarie (le operazioni di ricerca sui campi ordinati)
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Binary search operations (on sorted ranges)
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Impostare le operazioni (su intervalli ordinati)
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Set operations (on sorted ranges)
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Heap operazioni
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Heap operations
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Minimo / massimo le operazioni
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Minimum/maximum operations
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Operazioni numeriche
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Numeric operations
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Libreria C
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C library
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Defined in header <algorithm>
template< class InputIt, class OutputIt >
OutputIt move( InputIt first, InputIt last, OutputIt d_first );
(dal C++11)
Sposta gli elementi nel [first, last) gamma, ad un altro inizio gamma a d_first. Dopo questa operazione gli elementi della mosso-da posizione conterrà ancora valori validi del tipo appropriato, ma non necessariamente gli stessi valori di prima del trasloco.
Original:
Moves the elements in the range [first, last), to another range beginning at d_first. After this operation the elements in the moved-from range will still contain valid values of the appropriate type, but not necessarily the same values as before the move.
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Indice

[modifica] Parametri

first, last -
la gamma di elementi da spostare
Original:
the range of elements to move
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d_first -
l'inizio del campo di destinazione. Se d_first è all'interno [first, last), std::move_backward deve essere usato al posto di NJ std :: mossa </ span> .
Original:
the beginning of the destination range. If d_first is within [first, last), std::move_backward must be used instead of NJ std :: mossa </ span>. </div>
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</div></div></div></div>
Type requirements
-
InputIt must meet the requirements of InputIterator.
-
OutputIt must meet the requirements of OutputIterator.

[modifica] Valore di ritorno

Iteratore di uscita all'elemento passato l'ultimo elemento spostato (d_first + (last - first))
Original:
Output iterator to the element past the last element moved (d_first + (last - first))
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[modifica] Complessità

Esattamente last - first spostare le assegnazioni.
Original:
Exactly last - first move assignments.
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[modifica] Possibile implementazione

template<class InputIt, class OutputIt>
OutputIt move(InputIt first, InputIt last, 
                    OutputIt d_first)
{
    while (first != last) {
        *d_first++ = std::move(*first++);
    }
    return d_first;
}

[modifica] Esempio

Il codice seguente sposta oggetti thread (che a loro volta non sono copiabili) da un contenitore ad un altro. </ p>

Original:
<p>The following code moves thread objects (which themselves are not copyable) from one container to another.</p>
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</div>

#include <iostream>
#include <vector>
#include <list>
#include <iterator>
#include <thread>
#include <chrono>

void f(int n)
{
    std::this_thread::sleep_for(std::chrono::seconds(n));
    std::cout << "thread " << n << " ended" << '\n';
}

int main()
{
    std::vector<std::thread> v;
    v.emplace_back(f, 1);
    v.emplace_back(f, 2);
    v.emplace_back(f, 3);
    std::list<std::thread> l;
    // copy() would not compile, because std::thread is noncopyable
std :: mossa </ span>(v.begin(), v.end(), std::back_inserter(l));
    for(auto& t : l) t.join();
}
</div>

Uscita:
Original:
Output:
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thread 1 ended
thread 2 ended
thread 3 ended

[modifica] Vedi anche

sposta un intervallo di elementi in una nuova posizione in ordine inverso
Original:
moves a range of elements to a new location in backwards order
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(funzione di modello) [edit]

Estratto da "http://it.cppreference.com/mwiki/index.php?title=cpp/algorithm/move&oldid=24963"