iter_move(std::counted_iterator)

Since C++20

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

# Declarations

friend constexpr decltype(auto) iter_move( const std::counted_iterator& i )
noexcept(noexcept(ranges::iter_move(i.base())))
requires std::input_iterator<I>;

(since C++20)

# Parameters

i: a source iterator adaptor

# Return value

An rvalue reference or a prvalue temporary.

# Example

#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 = ',';
    std::cout << "}\n";
}
 
int main()
{
    std::vector<std::string> p{"Alpha", "Bravo", "Charlie"}, q;
    print("p", p);
    print("q", q);
 
    using RI = std::counted_iterator<std::vector<std::string>::iterator>;
 
    for (RI iter{p.begin(), 2}; iter != std::default_sentinel; ++iter)
        q.emplace_back(/* ADL */ iter_move(iter));
 
    print("p", p);
    print("q", q);
}

# Defect reports

DR	Applied to	Behavior as published	Correct behavior
LWG 3953	C++20	the return type was std::iter_rvalue_reference_t	changed to decltype(auto)

iter_move(std::counted_iterator)

# Declarations

# Parameters

# Return value

# Example

# Defect reports

# See also