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std::move

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< cpp‎ | algorithm

 
 
Biblioteca algoritmo
Funções
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Functions
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Não modificar operações de seqüência
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Non-modifying sequence operations
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Modificando operações de seqüência
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Modifying sequence operations
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Particionamento operações
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Partitioning operations
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Operações de classificação (em intervalos ordenados)
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Sorting operations (on sorted ranges)
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Binários operações de busca (em intervalos ordenados)
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Binary search operations (on sorted ranges)
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Definir operações (em intervalos ordenados)
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Set operations (on sorted ranges)
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Operações de pilha
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Heap operations
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Mínimo / máximo de operações
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Minimum/maximum operations
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Operações numéricas
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Numeric operations
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C biblioteca
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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 );
(a partir do C++ 11)
Move os elementos no [first, last) gama, para um outro intervalo de início d_first. Após esta operação os elementos no intervalo mudou-do ainda irá conter valores válidos do tipo apropriado, mas não necessariamente os mesmos valores de antes da mudança.
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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Índice

[editar] Parâmetros

first, last -
a gama de elementos para se mover
Original:
the range of elements to move
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d_first -
o início do intervalo de destino. Se d_first está dentro [first, last), std::move_backward deve ser utilizado em vez de NJ std :: movimento </ 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 :: movimento </ 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.

[editar] Valor de retorno

Iterador de saída para o elemento passado o último elemento movido (d_first + (last - first))
Original:
Output iterator to the element past the last element moved (d_first + (last - first))
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[editar] Complexidade

Exatamente last - first mover atribuições.
Original:
Exactly last - first move assignments.
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[editar] Possível implementação

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;
}

[editar] Exemplo

O código a seguir move objetos de rosca (que em si não são copiável) de um recipiente para outro. </ 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 :: movimento </ span>(v.begin(), v.end(), std::back_inserter(l));
    for(auto& t : l) t.join();
}
</div>

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

[editar] Veja também

move uma série de elementos para uma nova localização para trás
Original:
moves a range of elements to a new location in backwards order
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(modelo de função) [edit]

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