tmp/tmp4kmsma5d/{from.md → to.md}
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| 1 |
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#### Non-member functions <a id="time.clock.system.nonmembers">[[time.clock.system.nonmembers]]</a>
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``` cpp
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template<class charT, class traits, class Duration>
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basic_ostream<charT, traits>&
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operator<<(basic_ostream<charT, traits>& os, const sys_time<Duration>& tp);
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```
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*Constraints:* `treat_as_floating_point_v<typename Duration::rep>` is
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`false`, and `Duration{1} < days{1}` is `true`.
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*Effects:* Equivalent to:
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``` cpp
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auto const dp = floor<days>(tp);
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return os << format(os.getloc(), STATICALLY-WIDEN<charT>("{} {}"),
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year_month_day{dp}, hh_mm_ss{tp-dp});
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```
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[*Example 1*:
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``` cpp
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cout << sys_seconds{0s} << '\n'; // 1970-01-01 00:00:00
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cout << sys_seconds{946'684'800s} << '\n'; // 2000-01-01 00:00:00
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cout << sys_seconds{946'688'523s} << '\n'; // 2000-01-01 01:02:03
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```
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— *end example*]
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``` cpp
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template<class charT, class traits>
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basic_ostream<charT, traits>&
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operator<<(basic_ostream<charT, traits>& os, const sys_days& dp);
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```
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*Effects:* `os << year_month_day{dp}`.
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*Returns:* `os`.
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``` cpp
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template<class charT, class traits, class Duration, class Alloc = allocator<charT>>
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basic_istream<charT, traits>&
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from_stream(basic_istream<charT, traits>& is, const charT* fmt,
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sys_time<Duration>& tp, basic_string<charT, traits, Alloc>* abbrev = nullptr,
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minutes* offset = nullptr);
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```
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*Effects:* Attempts to parse the input stream `is` into the `sys_time`
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`tp` using the format flags given in the NTCTS `fmt` as specified in
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[[time.parse]]. If the parse fails to decode a valid date,
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`is.setstate(ios_base::failbit)` is called and `tp` is not modified. If
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| 52 |
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`%Z` is used and successfully parsed, that value will be assigned to
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| 53 |
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`*abbrev` if `abbrev` is non-null. If `%z` (or a modified variant) is
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| 54 |
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used and successfully parsed, that value will be assigned to `*offset`
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if `offset` is non-null. Additionally, the parsed offset will be
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subtracted from the successfully parsed timestamp prior to assigning
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that difference to `tp`.
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*Returns:* `is`.
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