ObjFW
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 
24 OF_ASSUME_NONNULL_BEGIN
25 
31 OF_SUBCLASSING_RESTRICTED
39 + (OFNull *)null;
40 @end
41 
42 OF_ASSUME_NONNULL_END
OFNull * null()
Returns an OFNull singleton.
Definition: OFNull.m:42
The root class for all other classes inside ObjFW.
Definition: OFObject.h:690
A protocol implemented by classes that support encoding to a JSON representation. ...
Definition: OFJSONRepresentation.h:49
A class for representing null values in collections.
Definition: OFNull.h:32
A protocol implemented by classes that support encoding to a MessagePack representation.
Definition: OFMessagePackRepresentation.h:33
A protocol for the creation of copies.
Definition: OFObject.h:1350