std::chrono::choose(3)

NAME
std::chrono::choose - std::chrono::choose

Synopsis
   Defined in header <chrono>
   enum class choose {
   earliest, (since C++20)
   latest
   };
   The scoped enumeration choose can be passed to certain member functions of
   std::chrono::time_zone and std::chrono::zoned_time to control how ambiguous or
   nonexistent local times should be resolved. Passing choose::earliest causes the
   earlier time point to be returned, while passing choose::latest causes the later
   time point to be returned. (For nonexistent local times, these two time points are
   identical.)
   If a choose is not passed and an ambiguous or nonexistent local time is encountered,
   a std::chrono::ambiguous_local_time or std::chrono::nonexistent_local_time exception
   (as applicable) will be thrown.

See also
                 constructs a zoned_time
   constructor (public member function of
                 std::chrono::zoned_time<Duration,TimeZonePtr>)
   to_sys converts a local_time in this time zone to a sys_time
                 (public member function of std::chrono::time_zone)