std::basic_string<CharT,Traits,Allocator>::rend, std::basic_string<CharT,Traits,Allocator>::crend
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basic_string::rendbasic_string::crend
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reverse_iterator rend();
(1)
(noexcept since C++11) (constexpr since C++20)
const_reverse_iterator rend() const;
(2)
(noexcept since C++11) (constexpr since C++20)
const_reverse_iterator crend() const noexcept;
(3)
(since C++11) (constexpr since C++20)
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.
[edit] Parameters
(none)
[edit] Return value
Reverse iterator to the character following the last character.
[edit] Complexity
Constant.
[edit] Notes
libc++ backports crend() to C++98 mode.
[edit] Example
Run this code
#include <algorithm> #include <iostream> #include <iterator> #include <string> int main() { std::string p("[A man, a plan, a canal: Panama]"); std::string q; std::copy (p.crbegin(), p.crend(), std::back_inserter (q)); std::cout << "q = " << q << '\n'; std::copy (q.crbegin(), q.crend(), p.rbegin()); std::cout << "p = " << p << '\n'; }
Output:
q = ]amanaP :lanac a ,nalp a ,nam A[ p = ]amanaP :lanac a ,nalp a ,nam A[