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std::chrono::weekday(3)	      C++ Standard Libary      std::chrono::weekday(3)

NAME
       std::chrono::weekday - std::chrono::weekday

Synopsis
	  Defined in header <chrono>
	  class	weekday;				       (since C++20)
	  inline constexpr std::chrono::weekday	Sunday{0};     (since C++20)
	  inline constexpr std::chrono::weekday	Monday{1};     (since C++20)
	  inline constexpr std::chrono::weekday	Tuesday{2};    (since C++20)
	  inline constexpr std::chrono::weekday	Wednesday{3};  (since C++20)
	  inline constexpr std::chrono::weekday	Thursday{4};   (since C++20)
	  inline constexpr std::chrono::weekday	Friday{5};     (since C++20)
	  inline constexpr std::chrono::weekday	Saturday{6};   (since C++20)

	  The  class weekday represent a day of	the week in the	Gregorian cal-
       endar. Its normal
	  range	is [0, 6], for Sunday through Saturday,	but it	can  hold  any
       value in	the range
	  [0,  255].  Seven  named constants are predefined in the std::chrono
       namespace for the
	  seven	days of	the week.

	  weekday is a TriviallyCopyable StandardLayoutType.

Member functions
	  constructor	  constructs a weekday
			  (public member function)
	  operator++
	  operator++(int) increments or	decrements the weekday
	  operator--	  (public member function)
	  operator--(int)
	  operator+=	  adds or subtracts a number of	days
	  operator-=	  (public member function)
	  c_encoding	  retrieves the	stored weekday value
	  iso_encoding	  retrieves ISO	8601 weekday value
			  (public member function)
	  ok		  checks if the	stored weekday value is	valid
			  (public member function)
			  convenience syntax for  constructing	a  weekday_in-
       dexed or
	  operator[]	  weekday_last from this weekday
			  (public member function)

	 Nonmember functions

	  operator==  compares two weekday values
	  (C++20)     (function)
	  operator+   performs arithmetic on weekdays
	  operator-   (function)
	  (C++20)
	  operator<<  outputs a	weekday	into a stream
	  (C++20)     (function	template)
	  from_stream parses a weekday from a stream according to the provided
       format
	  (C++20)     (function	template)

Helper classes
	  std::formatter<std::chrono::weekday>	specialization of std::format-
       ter that	formats	a
	  (C++20)			       weekday according to  the  pro-
       vided format
					       (class template specialization)

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

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<https://man.freebsd.org/cgi/man.cgi?query=std::chrono::weekday&sektion=3&manpath=FreeBSD+Ports+15.0>

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