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std::chrono...day_last::ok(3) C++ Standard Libarystd::chrono...day_last::ok(3)

NAME
       std::chrono::month_weekday_last::ok	-     std::chrono::month_week-
       day_last::ok

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

	  Checks if the	contained month	and weekday_last objects are valid.

Return value
	  month().ok() && weekday_last().ok()

Example
       // Run this code

	#include <iostream>
	#include <chrono>

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

	    auto	 mwdl	      {std::chrono::March/std::chrono::Wednes-
       day[std::chrono::last]};
	    std::cout << (mwdl.ok()) <<	' ';
	    mwdl	  =	     {std::chrono::month(3)/std::chrono::week-
       day(42)[std::chrono::last]};
	    std::cout << (mwdl.ok()) <<	'\n';
	}

Output:
	true false

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

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