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std::chrono::operator<<(std::chrono::year_month_day_last)

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_day_last& ymdl );
(since C++20)

Outputs a textual representation of ymdl into os, as if by.

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

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

Return value

os.

Example

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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