Namespaces
Variants
Actions

std::make_move_iterator

From cppreference.com
< cpp‎ | iterator
 
 
Iterator library
Iterator primitives Algorithm concepts and utilities Indirect callable concepts Common algorithm requirements
(C++20)
(C++20)
(C++20)
Utilities
(C++20)
Iterator adaptors
Defined in header <iterator>
template< class Iter >
std::move_iterator <Iter> make_move_iterator( Iter i );
(since C++11)
(constexpr 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

std::move_iterator <Iter>(std::move(i))

[edit] Example

Run this code
#include <iomanip>
#include <iostream>
#include <iterator>
#include <list>
#include <string>
#include <vector>
 
auto print = [](const auto rem, const auto& seq)
{
 for (std::cout << rem; const auto& 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]
(C++11)
converts the argument to an xvalue
(function template) [edit]

AltStyle によって変換されたページ (->オリジナル) /