std::make_move_iterator (3) - Linux Manuals

std::make_move_iterator: std::make_move_iterator

NAME

std::make_move_iterator - std::make_move_iterator

Synopsis

Defined in header <iterator>
template< class Iter > (since C++11)
std::move_iterator<Iter> make_move_iterator( const Iter& i ); (until C++14)
template< class Iter > (since C++14)
std::move_iterator<Iter> make_move_iterator( Iter i ); (until C++17)
template< class Iter > (since C++17)
constexpr std::move_iterator<Iter> make_move_iterator( Iter i );

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.

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 Iter >
  constexpr std::move_iterator<Iter> make_move_iterator( Iter i )
  {
      return std::move_iterator<Iter>(i);
  }

Example

// Run this code

  #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';
  }

Possible output:

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