std::chrono::month_day::ok

Since C++20

Determines whether this month_day stores a valid month-day combination.

# Declarations

constexpr bool ok() const noexcept;

(since C++20)

# Return value

true if the month and day combination is valid, otherwise false.

# Example

#include <chrono>
#include <iostream>
 
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';
}