std::chrono::operator<<(std::chrono::sys_time)

 

C++

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duration (C++11) time_point (C++11) time_of_day (C++20)	clock_time_conversion (C++20) clock_cast (C++20)
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C-style date and time

 

std::chrono::system_clock

Member functions

system_clock::now

system_clock::to_time_t

system_clock::from_time_t

Time point I/O

operator<<

formatter<std::chrono::sys_time>

from_stream

 

template <class CharT, class Traits, class Duration> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,            const std::chrono::sys_time<Duration>& tp);	(1)	(since C++20)
template <class CharT, class Traits, class Duration> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,            const std::chrono::sys_days& tp);	(2)	(since C++20)

Outputs tp into the stream os.

1) Equivalent to:

auto const dp = std::chrono::floor<std::chrono::days>(tp);
os << std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{} {}"),
                  std::chrono::year_month_day(dp), std::chrono::time_of_day(tp - dp));

where STATICALLY_WIDEN<CharT>("{} {}") is "{} {}" if CharT is char, and L"{} {}" if CharT is wchar_t.

This overload only participates in overload resolution if std::chrono::treat_as_floating_point_v<typename Duration::rep> is false and Duration(1) < std::chrono::days(1).

2) Equivalent to os << std::chrono::year_month_day(tp);

Return value

os.

See also

std::formatter<std::chrono::sys_time> (C++20)	specialization of std::formatter that formats a sys_time according to the provided format (class template specialization)
format (C++20)	stores formatted representation of the arguments in a new string (function template)
operator<<	outputs a year_month_day into a stream (function template)