std::chrono::operator<<(std::chrono::year_month_weekday)

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chrono I/O
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C-style date and time
std::chrono::year_month_weekday
Defined in header <chrono>
template < class CharT, class Traits >

std::basic_ostream <CharT, Traits> &
    operator<< ( std::basic_ostream <CharT, Traits> & os,

const std::chrono::year_month_weekday & ymwd ) ;
(since C++20)

Outputs a textual representation of ymwd into os, as if by

os << std::format (os.getloc ( ), STATICALLY_WIDEN<CharT> ( "{}/{:L}/{:L}" ),
                  ymwd.year ( ), ymwd.month ( ), ymwd.weekday_indexed ( ) ) ;

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

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)
 stores formatted representation of the arguments in a new string
(function template)
(C++20)
 formatting support for year_month_day
(class template specialization)
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