NAME¶

iter_move(std::move_iterator) - iter_move(std::move_iterator)

Synopsis¶

friend constexpr std::iter_rvalue_reference_t<Iter>
iter_move( const std::move_iterator& i ) noexcept(/* see below (since C++20)
*/);

Casts the result of dereferencing the underlying iterator to its associated rvalue
reference type.

The function body is equivalent to: return std::ranges::iter_move(i.base());.

This function template is not visible to ordinary unqualified or qualified lookup,
and can only be found by argument-dependent lookup when std::move_iterator<Iter> is
an associated class of the arguments.

Parameters¶

i - a source move iterator

Return value¶

An rvalue reference or a prvalue temporary.

Complexity¶

Constant.

Exceptions¶

noexcept specification:
noexcept(noexcept(ranges::iter_move(i.base())))

Example¶

// Run this code

#include <iomanip>
#include <iostream>
#include <iterator>
#include <string>
#include <vector>

void print(auto const& rem, auto const& v)
{
std::cout << rem << '[' << size(v) << "] { ";
for (char comma[]{0, ' ', 0}; auto const& s : v)
std::cout << comma << std::quoted(s), comma[0] = ',';
std::cout << " }\n";
}

int main()
{
std::vector<std::string> p{"Andromeda", "Cassiopeia", "Phoenix"}, q;

print("p", p), print("q", q);

using MI = std::move_iterator<std::vector<std::string>::iterator>;

for (MI first{p.begin()}, last{p.end()}; first != last; ++first)
q.emplace_back(/* ADL */ iter_move(first));

print("p", p), print("q", q);
}

Possible output:¶

p[3] { "Andromeda", "Cassiopeia", "Phoenix" }
q[0] { }
p[3] { "", "", "" }
q[3] { "Andromeda", "Cassiopeia", "Phoenix" }

See also¶

iter_move casts the result of dereferencing an object to its associated
(C++20) rvalue reference type
(customization point object)
iter_move casts the result of dereferencing the adjusted underlying
(C++20) iterator to its associated rvalue reference type
(function)
move obtains an rvalue reference
(C++11) (function template)
move_if_noexcept obtains an rvalue reference if the move constructor does not
(C++11) throw
(function template)
forward forwards a function argument
(C++11) (function template)
ranges::move moves a range of elements to a new location
(C++20) (niebloid)
ranges::move_backward moves a range of elements to a new location in backwards order
(C++20) (niebloid)

Category:¶

* conditionally noexcept