std::chrono::operator<<(std::chrono::sys_time)
Defined in header <chrono> | ||
|---|---|---|
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:
return os << std::format(os.getloc(), STATICALLY-WIDEN<CharT>("{:L%F %T}"), tp);
where STATICALLY_WIDEN<CharT>("{:L%F %T}") is "{:L%F %T}" if CharT is char, and L"{:L%F %T}" if CharT is wchar_t.
This overload participates in overload resolution only 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
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| P2372R3 | C++20 | the given locale was used by default |
L is needed to use the given locale |
See also
|
(C++20) | formatting support for sys_time (class template specialization) |
|
(C++20) | stores formatted representation of the arguments in a new string (function template) |
|
(C++20) | outputs a year_month_day into a stream (function template) |
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