cppdraft_translate/cppdraft/time/zone/exception/nonexist.md

[time.zone.exception.nonexist]

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 nonexistent_local_time(const local_time& tp, const local_info& i); };}

1

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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);

2

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

3

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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";

4

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[Example 1: #include #include 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]