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std::move

From cppreference.com
 
 
 
Defined in header <algorithm>
template< class InputIterator, class OutputIterator >
OutputIterator move( InputIterator first, InputIterator last, OutputIterator d_first );
(since C++11)

Moves the elements in the range [first, last), to another range beginning at d_first.

Contents

[edit] Parameters

first, last - the range of elements to move
d_first - the beginning of the destination range. If d_first is within [first, last), std::move_backward must be used instead of std::move.

[edit] Return value

Output iterator to the element past the last element moved (d_first + (last - first))

[edit] Complexity

Exactly last - first move assignments.

[edit] Possible implementation

[edit] Example

The following code moves threads handles (which themselves are not copyable) from one container to another.

#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 the thread`s parent is noncopyable

      std::move(v.begin(), v.end(), std::back_inserter(l));
   for(auto& t : l) t.join();
}

Output:

thread 1 ended
thread 2 ended
thread 3 ended

[edit] See also

moves a range of elements to a new location in backwards order
(function template) [edit]