std::span<T,Extent>::rbegin

< cpp‎ | container‎ | span

constexpr reverse_iterator rbegin() const noexcept;

Returns a reverse iterator to the first element of the reversed span. It corresponds to the last element of the non-reversed span. If the span is empty, the returned iterator is equal to rend().

range-rbegin-rend.svg

Parameters

(none)

Return value

Reverse iterator to the first element.

Complexity

Constant.


Example

#include <algorithm>
#include <iostream>
#include <iterator>
#include <span>
 
int main()
{
    constexpr std::span<const char> code{ "@droNE_T0P_w$s@s#_SECRET_a,p^42!" };
 
    auto hacker = [](const unsigned O) { return O-0141<120; };
 
    std::copy_if(code.rbegin(), code.rend(),
        std::ostream_iterator<const char>(std::cout), hacker);
}

Output:

password

See also

(C++20)
 returns a reverse iterator to the end
(public member function)