ObjFW
OFNull.h
1 /*
2  * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im>
3  *
4  * All rights reserved.
5  *
6  * This file is part of ObjFW. It may be distributed under the terms of the
7  * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
8  * the packaging of this file.
9  *
10  * Alternatively, it may be distributed under the terms of the GNU General
11  * Public License, either version 2 or 3, which can be found in the file
12  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
13  * file.
14  */
15 
16 #import "OFObject.h"
17 #import "OFJSONRepresentation.h"
18 #import "OFMessagePackRepresentation.h"
19 
20 OF_ASSUME_NONNULL_BEGIN
21 
27 OF_SUBCLASSING_RESTRICTED
35 + (OFNull *)null;
36 @end
37 
38 OF_ASSUME_NONNULL_END
OFNull * null()
Returns an OFNull singleton.
Definition: OFNull.m:38
The root class for all other classes inside ObjFW.
Definition: OFObject.h:686
A protocol implemented by classes that support encoding to a JSON representation. ...
Definition: OFJSONRepresentation.h:44
A class for representing null values in collections.
Definition: OFNull.h:28
A protocol implemented by classes that support encoding to a MessagePack representation.
Definition: OFMessagePackRepresentation.h:29
A protocol for the creation of copies.
Definition: OFObject.h:1346