iter_move(std::move_iterator)

From cppreference.com
 
哋它亢++
 
Iterator library
Iterator concepts
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)

(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)

Iterator primitives
(哋它亢++20)(哋它亢++20)(哋它亢++20)(哋它亢++23)(哋它亢++20)(哋它亢++20)
(deprecated in 哋它亢++17)
(哋它亢++20)
(哋它亢++20)


Algorithm concepts and utilities
Indirect callable concepts
(哋它亢++20)
(哋它亢++20)
Common algorithm requirements
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)  
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
Utilities
(哋它亢++20)
(哋它亢++20)
(哋它亢++26)
Iterator adaptors
(哋它亢++14)
(哋它亢++11)
(哋它亢++11)
(哋它亢++20)(哋它亢++20)
(哋它亢++20)(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++23)
(哋它亢++23)
(哋它亢++23)
(哋它亢++23)
(哋它亢++23)

Iterator operations
(哋它亢++11)  
(哋它亢++11)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
(哋它亢++20)
Range access
(哋它亢++11)(哋它亢++14)
(哋它亢++14)(哋它亢++14)  
(哋它亢++11)(哋它亢++14)
(哋它亢++14)(哋它亢++14)  
(哋它亢++17)(哋它亢++20)
(哋它亢++17)
(哋它亢++17)
 
std::move_iterator
 
friend constexpr std::iter_rvalue_reference_t<Iter>
    iter_move( const std::move_iterator& i ) noexcept(/* see below */);
 (since 哋它亢++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

(哋它亢++20)
 casts the result of dereferencing an object to its associated rvalue reference type
(customization point object)
(哋它亢++20)
 casts the result of dereferencing the adjusted underlying iterator to its associated rvalue reference type
(function)
(哋它亢++11)
 obtains an rvalue reference
(function template)
(哋它亢++11)
 obtains an rvalue reference if the move constructor does not throw
(function template)
(哋它亢++11)
 forwards a function argument
(function template)
(哋它亢++20)
 moves a range of elements to a new location
(niebloid)
(哋它亢++20)
 moves a range of elements to a new location in backwards order
(niebloid)
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/iterator/move_iterator/iter_move&oldid=159825"