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std::make_move_iterator

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Revision as of 14:49, 27 November 2012 by Nate (Talk | contribs)

Template:ddcl list begin <tr class="t-dsc-header">

<td>
Defined in header <iterator>
</td>

<td></td> <td></td> <tr class="t-dcl ">

<td >
template< class Iterator >
std::move_iterator<Iterator> make_move_iterator( const Iterator& i );
</td>

<td class="t-dcl-nopad"> </td> <td > (since C++11) </td> </tr> Template:ddcl list end

make_move_iterator is a convenience function template that constructs a std::move_iterator for the given iterator i with the type deduced from the type of the argument.

Contents

Parameters

i - input iterator to be converted to move iterator

Return value

A std::move_iterator which can be used to move from the elements accessed through i

Possible implementation

template< class Iterator >
std::move_iterator<Container> make_move_iterator( const Iterator& i )
{
    return std::move_iterator<Iterator>(i);
}

Example

#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <iterator>
int main()
{
    std::list<std::string> s{"one", "two", "three"};
 
    std::vector<std::string> v1(s.begin(), s.end()); // copy
 
    std::vector<std::string> v2(std::make_move_iterator(s.begin()),
                                std::make_move_iterator(s.end())); // move
 
    std::cout << "v1 now holds: ";
    for(auto str : v1)
            std::cout << "\"" << str << "\" ";
    std::cout << "\nv2 now holds: ";
    for(auto str : v2)
            std::cout << "\"" << str << "\" ";
    std::cout << "\noriginal list now holds: ";
    for(auto str : s)
            std::cout << "\"" << str << "\" ";
    std::cout << '\n';
}

Output:

v1 now holds: "one" "two" "three"
v2 now holds: "one" "two" "three"
original list now holds: "" "" ""

See also

Template:cpp/iterator/dcl list move iterator
(C++11)
obtains an rvalue reference
(function template) [edit]