(1) | ||
reverse_iterator rend() noexcept; | (until C++17) | |
constexpr reverse_iterator rend() noexcept; | (since C++17) | |
(2) | ||
const_reverse_iterator rend() const noexcept; | (until C++17) | |
constexpr const_reverse_iterator rend() const noexcept; | (since C++17) | |
(3) | ||
const_reverse_iterator crend() const noexcept; | (until C++17) | |
constexpr const_reverse_iterator crend() const noexcept; | (since C++17) |
Returns a reverse iterator to the element following the last element of the reversed array
. It corresponds to the element preceding the first element of the non-reversed array
. This element acts as a placeholder, attempting to access it results in undefined behavior.
(none).
Reverse iterator to the element following the last element.
Constant.
#include <algorithm> #include <array> #include <iostream> int main() { std::array<int, 11> a {1, 11, 11, 35, 0, 12, 79, 76, 76, 69, 40}; // print elements of array in reverse order using const_reverse_iterator`s std::for_each(a.crbegin(), a.crend(), [](int e){ std::cout << e << ' '; }); // ^^ ^^ std::cout << '\n'; // modify each element of array using non-const reverse_iterator`s std::for_each(a.rbegin(), a.rend(), [](int& e){ e += 32; }); // ^ ^ ^ // print elements as chars in reverse order using const_reverse_iterator`s std::for_each(a.crbegin(), a.crend(), [](char e){ std::cout << e; }); // ^^ ^^ ^^^^ std::cout << '\n'; }
Output:
40 69 76 76 79 12 0 35 11 11 1 Hello, C++!
(C++11) | returns a reverse iterator to the beginning (public member function) |
(C++14) | returns a reverse end iterator for a container or array (function template) |
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