std::chrono::operator<<(std::chrono::year_month_day)
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< cpp | chrono | year month day
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std::chrono::year_month_day
Member functions
Nonmember functions
operator<<
Helper classes
Defined in header
<chrono>
template< class CharT, class Traits >
(since C++20)
std::basic_ostream <CharT, Traits>&
operator<<( std::basic_ostream <CharT, Traits>& os,
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.
[edit] Return value
os
[edit] Example
This section is incomplete
Reason: no example
Reason: no example