std::chrono::year_month_day
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year_month_day
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std::chrono::year_month_day
Member functions
Nonmember functions
Helper classes
Defined in header
<chrono>
class year_month_day;
(since C++20)
The class year_month_day represents a specific year, month, and day. It is a field-based time point, with a resolution of std::chrono::days. std::chrono::years- and std::chrono::months-oriented arithmetic are supported directly. An implicit conversion to and from std::chrono::sys_days allows std::chrono::days-oriented arithmetic to be performed efficiently.
year_month_day is a TriviallyCopyable StandardLayoutType.
[edit] Member functions
[edit] Nonmember functions
(C++20)
year_month_day from a stream according to the provided format (function template) [edit]
[edit] Helper classes
hash support for std::chrono::year_month_day
(class template specialization)
(class template specialization)
[edit] Example
Run this code
#include <chrono> #include <iostream> int main() { const std::chrono::time_point now{std::chrono::system_clock::now ()}; const std::chrono::year_month_day ymd{std::chrono::floor <std::chrono::days >(now)}; std::cout << "Current Year: " << static_cast<int>(ymd.year()) << ", " "Month: " << static_cast<unsigned>(ymd.month()) << ", " "Day: " << static_cast<unsigned>(ymd.day()) << "\n" "ymd: " << ymd << '\n'; }
Possible output:
Current Year: 2023, Month: 9, Day: 4 ymd: 2023年09月04日