template<class RandomAccessIterator>
constexpr void sort(RandomAccessIterator first, RandomAccessIterator last);
template<class ExecutionPolicy, class RandomAccessIterator>
void sort(ExecutionPolicy&& exec,
RandomAccessIterator first, RandomAccessIterator last);
template<class RandomAccessIterator, class Compare>
constexpr void sort(RandomAccessIterator first, RandomAccessIterator last,
Compare comp);
template<class ExecutionPolicy, class RandomAccessIterator, class Compare>
void sort(ExecutionPolicy&& exec,
RandomAccessIterator first, RandomAccessIterator last,
Compare comp);
namespace ranges {
template<RandomAccessIterator I, Sentinel<I> S, class Comp = ranges::less<>,
class Proj = identity>
requires Sortable<I, Comp, Proj>
constexpr I
sort(I first, S last, Comp comp = {}, Proj proj = {});
template<RandomAccessRange R, class Comp = ranges::less<>, class Proj = identity>
requires Sortable<iterator_t<R>, Comp, Proj>
constexpr safe_iterator_t<R>
sort(R&& r, Comp comp = {}, Proj proj = {});
}