NAME¶

std::chrono::year_month_weekday::operatorsys_days, - std::chrono::year_month_weekday::operatorsys_days,

Synopsis¶

constexpr operator std::chrono::sys_days() const noexcept; (1) (since C++20)
constexpr explicit operator std::chrono::local_days() const (2) (since C++20)
noexcept;

Converts *this to a std::chrono::time_point representing the same date as this
year_month_weekday.

1) If year().ok() && month().ok() && weekday().ok():

* If index() == 0, returns a sys_days that represents the date 7 days prior to the
first weekday() of the year and month.
* Else, returns a sys_days that represents the date (index() - 1) * 7 days after
the first weekday() of the year and month.
Otherwise, the returned value is unspecified.
2) Same as (1), but returns local_days instead of sys_days. Equivalent to
local_days(sys_days(*this).time_since_epoch()).

Example¶

// Run this code

#include <chrono>
#include <iostream>
using namespace std::chrono;

int main()
{
constexpr auto ymwd{Tuesday[2]/11/2021};
std::cout << ymwd << '\n';
// convert from field-based to serial-based to add hours
constexpr auto sd = sys_days{ymwd} + 24h;
std::cout << sd << '\n';
constexpr auto ymd = floor<days>(sd);
static_assert(ymd == November/10/2021);
}

Output:¶

2021/Nov/Tue[2]
2021-11-10 00:00:00