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 program is free software: you can redistribute it and/or modify it
7 * under the terms of the GNU Lesser General Public License version 3.0 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
13 * version 3.0 for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * version 3.0 along with this program. If not, see
17 * <https://www.gnu.org/licenses/>.
18 */
19
20#import "OFObject.h"
21#import "OFJSONRepresentation.h"
22#import "OFMessagePackRepresentation.h"
23
24OF_ASSUME_NONNULL_BEGIN
25
31OF_SUBCLASSING_RESTRICTED
39+ (OFNull *)null;
40@end
41
42OF_ASSUME_NONNULL_END
A class for representing null values in collections.
Definition OFNull.h:33
OFNull * null()
Returns an OFNull singleton.
Definition OFNull.m:42
The root class for all other classes inside ObjFW.
Definition OFObject.h:692
A protocol for the creation of copies.
Definition OFObject.h:1350
A protocol implemented by classes that support encoding to a JSON representation.
Definition OFJSONRepresentation.h:49
A protocol implemented by classes that support encoding to a MessagePack representation.
Definition OFMessagePackRepresentation.h:33