std::chrono::month_day::ok - cppreference.com (original) (raw)
| Member functions |
|---|
| month_day::month_day |
| month_day::monthmonth_day::day |
| month_day::ok |
| Nonmember functions |
| operator==operator<=> |
| operator<< |
| from_stream |
| Helper classes |
| formatterstd::chrono::month\_day |
| hashstd::chrono::month\_day(C++26) |
| constexpr bool ok() const noexcept; | | (since C++20) | | ----------------------------------- | | ------------- |
Determines whether this month_day stores a valid month-day combination.
The combination is valid if month() represents a valid month (month().ok() == true), unsigned{day()} >= 1, and unsigned{day()} <= D, where D is the number of days in the month represented by month(). The number of days in February is considered to be 29.
[edit] Return value
true if the month and day combination is valid, otherwise false.
[edit] Example
Run this code
#include #include int main() { std::cout << std::boolalpha; constexpr auto md1{std::chrono::July/15}; std::cout << (md1.ok()) << ' '; constexpr std::chrono::month_day md2{std::chrono::month(14), std::chrono::day(42)}; std::cout << (md2.ok()) << ' '; constexpr auto md3{std::chrono::February/29}; std::cout << (md3.ok()) << '\n'; }
Output:
true false true