std::ranges...ional_range(3) C++ Standard Libary std::ranges...ional_range(3) NAME std::ranges::bidirectional_range - std::ranges::bidirectional_range Synopsis Defined in header <ranges> template< class T > concept bidirectional_range = (since C++20) ranges::forward_range<T> && std::bidirectional_iterator<ranges::iterator_t<T>>; The bidirectional_range concept is a refinement of range for which ranges::begin returns a model of bidirectional_iterator. Example // Run this code #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>> ); } See also ranges::forward_range specifies a range whose iterator type satis- fies (C++20) forward_iterator (concept) ranges::random_access_range specifies a range whose iterator type satis- fies (C++20) random_access_iterator (concept) http://cppreference.com 2024.06.10 std::ranges...ional_range(3)
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