zoned_traits provides a means for customizing
the behavior of
zoned_time<Duration, TimeZonePtr>
for the
zoned_time default constructor,
and constructors taking
string_view. A specialization for const time_zone* is provided by the implementation:
namespace std::chrono {
template<> struct zoned_traits<const time_zone*> {
static const time_zone* default_zone();
static const time_zone* locate_zone(string_view name);
};
}