tmp/tmpr0e938ll/{from.md → to.md}
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#### Non-member functions <a id="time.clock.file.nonmembers">[[time.clock.file.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 file_time<Duration>& t);
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```
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*Effects:* Equivalent to:
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``` cpp
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return os << format(STATICALLY-WIDEN<charT>("{:%F %T}"), t);
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```
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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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file_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 `file_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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`%Z` is used and successfully parsed, that value will be assigned to
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`*abbrev` if `abbrev` is non-null. If `%z` (or a modified variant) is
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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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