std:: undeclare_reachable

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C++
Utilities library
General utilities
Relational operators (deprecated in C++20)
Dynamic memory management
Uninitialized memory algorithms
Constrained uninitialized memory algorithms
Allocators
Garbage collection support
(C++11) (until C++23)
undeclare_reachable
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)
(C++11) (until C++23)



Defined in header <memory>
template < class T >
T * undeclare_reachable ( T * p ) ;
(since C++11)
(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 destructed since then

Return value

A safely-derived copy of p .

Exceptions

Throws nothing.

See also

(C++11) (removed in C++23)
declares that an object can not be recycled
(function)
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