std::chrono::operator<<(std::chrono::year_month_day)
From cppreference.com
< cpp | chrono | year month day
| Defined in header <chrono>
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| template< class CharT, class Traits > std::basic_ostream<CharT, Traits>& |
(since C++20) | |
Outputs a textual representation of ymd into the stream os. This first forms a std::basic_string<CharT> s consisting of a textual representation of the date in the format yyyy-mm-dd (same as the one output by formatter with the %F specifier). Then, if !ymd.ok(), appends " is not a valid date" to s. Inserts s into os.
Equivalent to
return os << (ymd.ok() ?
std::format(STATICALLY_WIDEN<CharT>("{:%F}"), ymd) :
std::format(STATICALLY_WIDEN<CharT>("{:%F} is not a valid date"), ymd));
where STATICALLY_WIDEN<CharT>("...") is "..." if CharT is char, and L"..." if CharT is wchar_t.
Return value
os
Example
| This section is incomplete Reason: no example |
See also
| (C++20) |
stores formatted representation of the arguments in a new string (function template) |
formatting support for year_month_day (class template specialization) |