std::flat_set<Key,Compare,KeyContainer>::rbegin, std::flat_set<Key,Compare,KeyContainer>::

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< cpp‎ | container‎ | flat set

reverse_iterator rbegin() noexcept;
(1) (since C++23)
const_reverse_iterator rbegin() const noexcept;
(2) (since C++23)
const_reverse_iterator crbegin() const noexcept;
(3) (since C++23)

Returns a reverse iterator to the first element of the reversed flat_set. It corresponds to the last element of the non-reversed flat_set. If the flat_set is empty, the returned iterator is equal to rend()

range-rbegin-rend.svg

Parameters

(none)

Return value

Reverse iterator to the first element.

Complexity

Constant.

Notes

Because both iterator and const_iterator

The underlying iterator of the returned reverse iterator is the end iterator

Example

#include <iostream>
#include <flat_set>
 
int main()
{
    std::flat_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

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