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std::basic_string<CharT,Traits,Allocator>::rend, std::basic_string<CharT,Traits,Allocator>::crend

From cppreference.com
< cpp‎ | string‎ | basic string
 
 
 
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basic_string::rendbasic_string::crend
(C++11)
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(1)
reverse_iterator rend();
(until C++11)
reverse_iterator rend() noexcept;
(since C++11)
(until C++20)
constexpr reverse_iterator rend() noexcept;
(since C++20)
(2)
const_reverse_iterator rend() const;
(until C++11)
const_reverse_iterator rend() const noexcept;
(since C++11)
(until C++20)
constexpr const_reverse_iterator rend() const noexcept;
(since C++20)
(3)
const_reverse_iterator crend() const noexcept;
(since C++11)
(until C++20)
constexpr const_reverse_iterator crend() const noexcept;
(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.

range-rbegin-rend.svg

Contents

[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

#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[

[edit] See also

returns a reverse iterator to the beginning
(public member function) [edit]
returns a reverse iterator to the end
(public member function of std::basic_string_view<CharT,Traits>) [edit]