NAME¶

std::chrono::year_month_weekday::ok - std::chrono::year_month_weekday::ok

Synopsis¶

constexpr bool ok() const noexcept; (since C++20)

Checks if this year_month_weekday object represents a valid date.

Return value¶

true if this year_month_weekday object represents a valid date, that is, year().ok()
&& month().ok() && weekday_indexed().ok() is true and there are at least index()
weekday()s in the specified year and month. Otherwise false.

Example¶

// Run this code

#include <iostream>
#include <chrono>

int main()
{
std::cout << std::boolalpha;

auto ymwdi {std::chrono::Wednesday[1]/1/2021};
std::cout << (ymwdi.ok()) << ' ';
ymwdi = std::chrono::year(2021)/std::chrono::month(1)/
std::chrono::Wednesday[42];
std::cout << (ymwdi.ok()) << '\n';
}

Output:¶

true false