NAME¶

std::chrono::year_month_weekday_last::ok - std::chrono::year_month_weekday_last::ok

Synopsis¶

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

Checks if this object represents a valid date. Since a year_month_weekday_last
represents the last weekday of a particular month, it is valid as long as the year,
month and weekday are valid.

Return value¶

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

Example¶

// Run this code

#include <iostream>
#include <chrono>
using namespace std::chrono;

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

auto ymwdl {Tuesday[last]/11/2020};
std::cout << (ymwdl.ok()) << ' ';
ymwdl = Tuesday[last]/-2/2021;
std::cout << (ymwdl.ok()) << ' ';
ymwdl += months(0); // Normalize month
std::cout << (ymwdl.ok()) << '\n';
}

Output:¶

true false true