NAME¶

std::chrono::year_month_day_last::ok - std::chrono::year_month_day_last::ok

Synopsis¶

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

Checks if *this represents a valid date. Because a year_month_day_last represents
the last day of a particular month, it represents a valid date as long as the year
and month are valid.

Return value¶

year().ok() && month().ok()

Example¶

// Run this code

#include <iostream>
#include <chrono>

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

auto ymdl {std::chrono::last/11/2020};
std::cout << (ymdl.ok()) << ' ';
ymdl = std::chrono::year(2020)/std::chrono::month(13)/std::chrono::last;
std::cout << (ymdl.ok()) << '\n';
}

Output:¶

true false