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

NAME
       std::chrono::year_month_weekday::ok   -	 std::chrono::year_month_week-
       day::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 <cassert>
	#include <chrono>

	int main()
	{
	    auto ymwdi{std::chrono::Wednesday[1]/1/2021};
	    assert(ymwdi.ok());
	    ymwdi							     =
       std::chrono::year(2021)/std::chrono::month(1)/std::chrono::Wednes-
       day[42];
	    assert(!ymwdi.ok());
	}

http://cppreference.com		  2024.06.10	 std::chrono..._weekday::ok(3)

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