ObjFW
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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
20OF_ASSUME_NONNULL_BEGIN
21
27OF_SUBCLASSING_RESTRICTED
35+ (OFNull *)null;
36@end
37
38OF_ASSUME_NONNULL_END
A class for representing null values in collections.
Definition OFNull.h:29
OFNull * null()
Returns an OFNull singleton.
Definition OFNull.m:38
The root class for all other classes inside ObjFW.
Definition OFObject.h:688
A protocol for the creation of copies.
Definition OFObject.h:1346
A protocol implemented by classes that support encoding to a JSON representation.
Definition OFJSONRepresentation.h:44
A protocol implemented by classes that support encoding to a MessagePack representation.
Definition OFMessagePackRepresentation.h:29