System.SysUtils.FreeAndNil
Delphi
procedure FreeAndNil(var Obj);
C++
extern DELPHI_PACKAGE void __fastcall FreeAndNil(void *Obj);
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
procedure function |
public | System.SysUtils.pas System.SysUtils.hpp |
System.SysUtils | System.SysUtils |
Description
Frees an object reference and replaces the reference with nil (Delphi) or NULL (C++).
Use FreeAndNil to ensure that a variable is nil (Delphi) or NULL (C++) after you free the object it references. Pass any variable that represents an object as the Obj parameter.
Warning: Obj must be an instance of a TObject descendant.
For C++, a reference to the object must be passed to FreeAndNil. For example:
TObject *obj = new TObject(); FreeAndNil(&obj);
See Also
Code Examples