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std::list<T,Allocator>::rend, std::list<T,Allocator>::crend

From cppreference.com
< cpp‎ | container‎ | list
 
 
 
std::list
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
 
reverse_iterator rend();
(1) (noexcept since C++11)
(constexpr since C++26)
const_reverse_iterator rend() const;
(2) (noexcept since C++11)
(constexpr since C++26)
const_reverse_iterator crend() const noexcept;
(3) (since C++11)
(constexpr since C++26)

Returns a reverse iterator past the last element of the reversed *this. It corresponds to the element preceding the first element of the non-reversed *this.

This returned iterator only acts as a sentinel. It is not guaranteed to be dereferenceable.

[edit] Return value

Reverse iterator to the element following the last element.

[edit] Complexity

Constant.

Notes

libc++ backports crend() to C++98 mode.

[edit] Example

Run this code
#include <algorithm>
#include <iostream>
#include <numeric>
#include <string>
#include <list>
 
int main()
{
 std::list <int> nums{1, 2, 4, 8, 16};
 std::list <std::string > fruits{"orange", "apple", "raspberry"};
 std::list <char> empty;
 
 // Print list.
 std::for_each (nums.rbegin(), nums.rend(), [](const int n) { std::cout << n << ' '; });
 std::cout << '\n';
 
 // Sums all integers in the list nums (if any), printing only the result.
 std::cout << "Sum of nums: "
 << std::accumulate (nums.rbegin(), nums.rend(), 0) << '\n';
 
 // Prints the first fruit in the list fruits, checking if there is any.
 if (!fruits.empty())
 std::cout << "First fruit: " << *fruits.rbegin() << '\n';
 
 if (empty.rbegin() == empty.rend())
 std::cout << "list 'empty' is indeed empty.\n";
}

Output:

16 8 4 2 1
Sum of nums: 31
First fruit: raspberry
list 'empty' is indeed empty.

[edit] See also

returns a reverse iterator to the beginning
(public member function) [edit]
(C++14)
returns a reverse end iterator for a container or array
(function template) [edit]
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