NAME

std::set::rend,std::set::crend - std::set::rend,std::set::crend

Synopsis

reverse_iterator rend(); (until C++11)
reverse_iterator rend() noexcept; (since C++11)
const_reverse_iterator rend() const; (until C++11)
const_reverse_iterator rend() const noexcept; (since C++11)
const_reverse_iterator crend() const noexcept; (since C++11)

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

range-rbegin-rend.svg

Parameters

(none)

Return value

Reverse iterator to the element following the last element.

Complexity

Constant.

Notes

Because both iterator and const_iterator are constant iterators (and may in fact be
the same type), it is not possible to mutate the elements of the container through
an iterator returned by any of these member functions.

Example

// Run this code

#include <iostream>
#include <set>

int main()
{
std::set<unsigned> rep{1, 2, 3, 4, 1, 2, 3, 4};

for (auto it = rep.crbegin(); it != rep.crend(); ++it) {
for (auto n = *it; n > 0; --n)
std::cout << "⏼" << ' ';
std::cout << '\n';
}
}

Output:

⏼ ⏼ ⏼ ⏼
⏼ ⏼ ⏼
⏼ ⏼
⏼

See also

rbegin returns a reverse iterator to the beginning
crbegin (public member function)
(C++11)
rend returns a reverse end iterator for a container or array
crend (function template)
(C++14)