std::basic_string::rend, std::basic_string::crend

From cppreference.com
< cpplrm; | stringlrm; | basic string
std::basic_string
reverse_iterator rend();
const_reverse_iterator rend() const;
const_reverse_iterator crend() const;
(since C++11)

Returns a reverse iterator to the character following the last character of the reversed string. It corresponds to the character preceding the first character of the non-reversed string. This character acts as a placeholder, attempting to access it results in undefined behavior.

range-rbegin-rend.svg

Parameters

(none)

Return value

reverse iterator to the character following the last character

Exceptions

(none) (until C++11)
noexcept specification:
noexcept
(since C++11)

Complexity

Constant

Example

#include <algorithm>
#include <iostream>
#include <iterator>
#include <string>

int main()
{
  std::string s("A man, a plan, a canal: Panama");
  {
    std::string c;
    std::copy(s.rbegin(), s.rend(), std::back_inserter(c));
    std::cout << c <<'\n'; // "amanaP:lanac a ,nalp a ,nam A"
  }

  {
    std::string c;
    std::copy(s.crbegin(), s.crend(), std::back_inserter(c));
    std::cout << c <<'\n'; // "amanaP:lanac a ,nalp a ,nam A"
  }
}

Output:

amanaP:lanac a ,nalp a ,nam A
amanaP:lanac a ,nalp a ,nam A

See also

returns a reverse iterator to the beginning
(public member function)