std::chrono::weekday_indexed
From cppreference.com
Defined in header <chrono>
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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.
Contents |
[edit] Member functions
constructs a weekday_indexed (public member function) | |
access the stored weekday (public member function) | |
access the stored index (public member function) | |
checks if the weekday and index are both valid (public member function) |
[edit] Nonmember functions
(C++20) |
compares two weekday_indexed values (function) |
(C++20) |
outputs a weekday_indexed into a stream (function template) |
[edit] Helper classes
formatting support for weekday_indexed (class template specialization) | |
hash support for std::chrono::weekday_indexed (class template specialization) |
[edit] Example
Run this code
#include <chrono> #include <iostream> 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