template<class BidirectionalIterator> constexpr bool next_permutation(BidirectionalIterator first, BidirectionalIterator last); template<class BidirectionalIterator, class Compare> constexpr bool next_permutation(BidirectionalIterator first, BidirectionalIterator last, Compare comp); template<bidirectional_iterator I, sentinel_for<I> S, class Comp = ranges::less, class Proj = identity> requires sortable<I, Comp, Proj> constexpr ranges::next_permutation_result<I> ranges::next_permutation(I first, S last, Comp comp = {}, Proj proj = {}); template<bidirectional_range R, class Comp = ranges::less, class Proj = identity> requires sortable<iterator_t<R>, Comp, Proj> constexpr ranges::next_permutation_result<borrowed_iterator_t<R>> ranges::next_permutation(R&& r, Comp comp = {}, Proj proj = {});