This documentation is archived and is not being maintained.
Informs a garbage_collector that a specified memory location is not reachable.
Type *undeclare_reachable(Type *_Ptr);
A pointer to the memory address to be declared not reachable.
Returns a pointer to the specified memory location.
If _Ptr is not null, the function informs any garbage collector that _Ptr is hereafter not reachable. It returns a safely derived pointer that compares equal to _Ptr.