# std::chrono::year_month_weekday::year, std::chrono::year_month_weekday::month, std::chrono::year_month_weekday::weekday, std::chrono::year_month_weekday::index, std::chrono::year_month_weekday::weekday_indexed

< cpp‎ | chrono‎ | year month weekday

constexpr std::chrono::year year() const noexcept; | (1) | (C++20 起)
constexpr std::chrono::month month() const noexcept; | (2) | (C++20 起)
constexpr std::chrono::weekday weekday() const noexcept; | (3) | (C++20 起)
constexpr unsigned index() const noexcept; | (4) | (C++20 起)
constexpr std::chrono::weekday_indexed weekday_indexed() const noexcept; | (5) | (C++20 起)

返回存储于此 `year_month_weekday` 对象中的域的值。

### 返回值

1) 返回存储的 std::chrono::year 值。
2) 返回存储的 std::chrono::month 值。
3) 返回存储的 std::chrono::weekday 值。
4) 返回存储的星期之日下标。
5) weekday()[index()] 。