2 * Copyright 2004 The WebRTC Project Authors. All rights reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
11 #ifndef WEBRTC_BASE_CONSTRUCTORMAGIC_H_
12 #define WEBRTC_BASE_CONSTRUCTORMAGIC_H_
14 // Undefine macros first, just in case. Some third-party includes have their own
17 #undef DISALLOW_ASSIGN
18 #define DISALLOW_ASSIGN(TypeName) \
19 void operator=(const TypeName&)
21 // A macro to disallow the evil copy constructor and operator= functions
22 // This should be used in the private: declarations for a class.
23 #undef DISALLOW_COPY_AND_ASSIGN
24 #define DISALLOW_COPY_AND_ASSIGN(TypeName) \
25 TypeName(const TypeName&); \
26 DISALLOW_ASSIGN(TypeName)
28 // Alternative, less-accurate legacy name.
29 #undef DISALLOW_EVIL_CONSTRUCTORS
30 #define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \
31 DISALLOW_COPY_AND_ASSIGN(TypeName)
33 // A macro to disallow all the implicit constructors, namely the
34 // default constructor, copy constructor and operator= functions.
36 // This should be used in the private: declarations for a class
37 // that wants to prevent anyone from instantiating it. This is
38 // especially useful for classes containing only static methods.
39 #undef DISALLOW_IMPLICIT_CONSTRUCTORS
40 #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
42 DISALLOW_EVIL_CONSTRUCTORS(TypeName)
45 #endif // WEBRTC_BASE_CONSTRUCTORMAGIC_H_