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std::chrono...k::from_sys(3)  C++ Standard Libary std::chrono...k::from_sys(3)

NAME
       std::chrono::utc_clock::from_sys	- std::chrono::utc_clock::from_sys

Synopsis
	  template< class Duration >

	  static	    std::chrono::utc_time<std::common_type_t<Duration,
       (since C++20)
	  std::chrono::seconds>>

	  from_sys( const std::chrono::sys_time<Duration>& t );

	  Converts a sys_time t	to a utc_time u	that represents	the same point
       in time.

	  u.time_since_epoch() - t.time_since_epoch() is equal to  the	number
       of leap seconds
	  that	was  inserted  between t and 1 January 1970. If	t is the exact
       date of a leap
	  second insertion, that leap second is	counted	as inserted.

Return value
	  A utc_time representing the same point in time as t.

See also
	  to_sys     converts utc_time to sys_time
	  [static]   (public static member function)
	  clock_cast convert time points of one	clock to another
	  (C++20)    (function template)

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

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