< cpp‎ | iterator
Iterator library
Iterator concepts
Iterator primitives
Algorithm concepts and utilities
Indirect callable concepts
Common algorithm requirements
Iterator adaptors
Range access
Defined in header <iterator>
template< class Iter >
std::move_iterator<Iter> make_move_iterator( Iter i );
(since C++11)
(until C++17)
template< class Iter >
constexpr std::move_iterator<Iter> make_move_iterator( Iter i );
(since C++17)

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.


[edit] Parameters

i - input iterator to be converted to move iterator

[edit] Return value

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

[edit] Possible implementation

template<class Iter>
constexpr std::move_iterator<Iter> make_move_iterator(Iter i)
    return std::move_iterator<Iter>(std::move(i));

[edit] Example

#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <string>
#include <vector>
auto print = [](auto const rem, auto const& seq)
    for (std::cout << rem; auto const& str : seq)
        std::cout << std::quoted(str) << ' ';
    std::cout << '\n';
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
    print("v1 now holds: ", v1);
    print("v2 now holds: ", v2);
    print("original list now holds: ", s);

Possible output:

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

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 2061 C++11 make_move_iterator did not convert array arguments to pointers made to convert

[edit] See also

iterator adaptor which dereferences to an rvalue
(class template) [edit]
obtains an rvalue reference
(function template) [edit]