std::chrono::weekday_indexed - cppreference.com (original) (raw)

std::chrono::weekday_indexed

| | | | | ----------------------- | | ------------- | | class weekday_indexed; | | (since C++20) |

The class weekday_indexed combines a weekday, representing a day of the week in the proleptic Gregorian calendar, with a small index _n_ in the range [1, 5]. It represents the first, second, third, fourth, or fifth weekday of some month.

weekday_indexed is a TriviallyCopyable StandardLayoutType.

[edit] Member functions

[edit] Nonmember functions

[edit] Helper classes

[edit] Example

#include #include   int main() { using namespace std::chrono;   constexpr weekday_indexed wi = Friday[2];   // Indexed weekday can be used at any place where chrono::day can be used: constexpr year_month_weekday ymwd = 2021y / August / wi; static_assert(ymwd == August / wi / 2021y && ymwd == wi / August / 2021y); std::cout << ymwd << '\n';   constexpr year_month_day ymd{ymwd}; // a conversion static_assert(ymd == 2021y / 8 / 13); std::cout << ymd << '\n'; }

Possible output:

2021/Aug/Fri[2] 2021-08-13