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std::chrono...ay_last::ok(3)  C++ Standard Libary std::chrono...ay_last::ok(3)

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

http://cppreference.com		  2022.07.31	  std::chrono...ay_last::ok(3)

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