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Showing content from https://en.cppreference.com/w/cpp/language/../keyword/../ranges/bidirectional_range.html below:

std::ranges::bidirectional_range - cppreference.com

The bidirectional_range concept is a refinement of range for which ranges::begin returns a model of bidirectional_iterator.

#include <forward_list>
#include <list>
#include <ranges>
#include <set>
#include <unordered_set>
 
int main()
{
    static_assert(
            std::ranges::bidirectional_range<std::set<int>> and
        not std::ranges::bidirectional_range<std::unordered_set<int>> and
            std::ranges::bidirectional_range<std::list<int>> and
        not std::ranges::bidirectional_range<std::forward_list<int>>
    );
}

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