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std::chrono...dexed::index(3) C++ Standard Libarystd::chrono...dexed::index(3)

NAME
       std::chrono::weekday_indexed::index - std::chrono::weekday_indexed::in-
       dex

Synopsis
	  constexpr unsigned index() const noexcept;  (since C++20)

	  Accesses the index stored in *this.

Return value
	  The index stored in *this.

Example
       // Run this code

	#include <iostream>
	#include <chrono>

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

	    std::chrono::weekday_indexed wdi {std::chrono::Tuesday[2]};	// 2nd
       Tuesday of a month
	    std::cout << (std::chrono::year_month_day{wdi/10/2019} ==
			  std::chrono::year_month_day{std::chrono::Octo-
       ber/8/2019}) << ' ';

	    wdi	 =  {wdi.weekday()[wdi.index()	+  2]};	 // 2nd	Tuesday	=> 4th
       Tuesday
	    std::cout << (std::chrono::year_month_day{wdi/10/2019} ==
			  std::chrono::year_month_day{std::chrono::Octo-
       ber/22/2019}) <<	'\n';
	}

Output:
	true true

http://cppreference.com		  2022.07.31	 std::chrono...dexed::index(3)

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