2.5 KiB
[time.clock.local]
30 Time library [time]
30.7 Clocks [time.clock]
30.7.9 Local time [time.clock.local]
The family of time points denoted by local_time are based on the pseudo clock local_t.
local_t has no member now() and thus does not meet the clock requirements.
Nevertheless local_time serves the vital role of representing local time with respect to a not-yet-specified time zone.
Aside from being able to get the current time, the complete time_point algebra is available for local_time (just as for sys_time).
template<class charT, class traits, class Duration> basic_ostream<charT, traits>& operator<<(basic_ostream<charT, traits>& os, const local_time<Duration>& lt);
Effects: os << sys_time{lt.time_since_epoch()};
Returns: os.
template<class charT, class traits, class Duration, class Alloc = allocator<charT>> basic_istream<charT, traits>& from_stream(basic_istream<charT, traits>& is, const charT* fmt, local_time<Duration>& tp, basic_string<charT, traits, Alloc>* abbrev = nullptr, minutes* offset = nullptr);
Effects: Attempts to parse the input stream is into the local_time tp using the format flags given in the NTCTS fmt as specified in [time.parse].
If the parse fails to decode a valid date,is.setstate(ios_base::failbit) is called andtp is not modified.
If %Z is used and successfully parsed, that value will be assigned to *abbrev if abbrev is non-null.
If %z (or a modified variant) is used and successfully parsed, that value will be assigned to *offset if offset is non-null.
Returns: is.