std::chrono::year_month_weekday::ok

constexpr bool ok() const noexcept;

Checks if this year_month_weekday object represents a valid date.

Return value

true if this year_month_weekday object represents a valid date, that is, year().ok() && month().ok() && weekday_indexed().ok() is true and there are at least index() weekday()s in the specified year and month. Otherwise false.