[time.zone.exception.nonexist] (original) (raw)

30 Time library [time]

30.11 Time zones [time.zone]

30.11.3 Exception classes [time.zone.exception]

30.11.3.1 Class nonexistent_local_time [time.zone.exception.nonexist]

namespace std::chrono { class nonexistent_local_time : public runtime_error { public: template<class Duration> nonexistent_local_time(const local_time<Duration>& tp, const local_info& i);};}

nonexistent_local_time is thrown when an attempt is made to convert a non-existent local_time to a sys_timewithout specifying choose​::​earliest or choose​::​latest.

template<class Duration> nonexistent_local_time(const local_time<Duration>& tp, const local_info& i);

Preconditions: i.result == local_info​::​nonexistent is true.

Effects: Initializes the base class with a sequence of charequivalent to that produced by os.str()initialized as shown below:ostringstream os; os << tp << " is in a gap between\n" << local_seconds{i.first.end.time_since_epoch()} + i.first.offset << ' ' << i.first.abbrev << " and\n" << local_seconds{i.second.begin.time_since_epoch()} + i.second.offset << ' ' << i.second.abbrev<< " which are both equivalent to\n" << i.first.end << " UTC";

[Example 1: #include <chrono> #include <iostream> int main() { using namespace std::chrono;try { auto zt = zoned_time{"America/New_York", local_days{Sunday[2]/March/2016} + 2h + 30min};} catch (const nonexistent_local_time& e) { std::cout << e.what() << '\n';} }

Produces the output:

2016-03-13 02:30:00 is in a gap between 2016-03-13 02:00:00 EST and 2016-03-13 03:00:00 EDT which are both equivalent to 2016-03-13 07:00:00 UTC

— _end example_]