29 Time library [time]

29.11 Time zones [time.zone]

29.11.3 Exception classes [time.zone.exception]

29.11.3.1 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_­time without 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 char equivalent 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]