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.
os.
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 |
|
(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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