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

 

C++

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as_bytesas_writable_bytes

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dynamic_extent

Deduction guides

 

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().

Parameters

(none)

Return value

Reverse iterator to the first element.

Complexity

Constant.

Example

Run this code

#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

rend (C++20)	returns a reverse iterator to the end (public member function)
rbegincrbegin (C++14)	returns a reverse iterator to the beginning of a container or array (function template)