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std::undeclare_reachable(3)   C++ Standard Libary  std::undeclare_reachable(3)

NAME
       std::undeclare_reachable	- std::undeclare_reachable

Synopsis
	  Defined in header <memory>
	  template< class T >		   (since C++11)
	  T* undeclare_reachable( T* p );  (removed in C++23)

	  Removes  the	reachable  status  of  the  object,  referenced	by the
       pointer p, if it	was
	  previously set by std::declare_reachable. If the object was declared
       reachable
	  multiple times, equal	number of calls	to  undeclare_reachable	 would
       be needed to
	  remove  this	status.	 Once the object is not	declared reachable and
       has no pointers
	  referencing it, it may be reclaimed by garbage collector or reported
       as a leak by a
	  leak detector.

Parameters
	  p - a	pointer	to an object previously	declared reachable and not de-
       structed	since
	      then

Return value
	  A safely-derived copy	of p.

Exceptions
	  Throws nothing.

Example
	   This	section	is incomplete
	   Reason: no example

See also
	  declare_reachable	    declares that an object can	not  be	 recy-
       cled
	  (C++11)(removed in C++23) (function)

http://cppreference.com		  2022.07.31	   std::undeclare_reachable(3)

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