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std::ranges::BidirectionalRange

Defined in header <ranges>
template<class T>
  concept BidirectionalRange =
    ForwardRange<T> && BidirectionalIterator<iterator_t<T>>;

The BidirectionalRange concept is a refinement of Range for which ranges::begin returns a model of BidirectionalIterator.

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http://en.cppreference.com/w/cpp/ranges/BidirectionalRange