1/*
2 *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
3 *
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.
9 */
10
11#ifndef WEBRTC_BASE_CONSTRUCTORMAGIC_H_
12#define WEBRTC_BASE_CONSTRUCTORMAGIC_H_
13
14// Undefine macros first, just in case. Some third-party includes have their own
15// version.
16
17#undef DISALLOW_ASSIGN
18#define DISALLOW_ASSIGN(TypeName) \
19  void operator=(const TypeName&)
20
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)
27
28// Alternative, less-accurate legacy name.
29#undef DISALLOW_EVIL_CONSTRUCTORS
30#define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \
31  DISALLOW_COPY_AND_ASSIGN(TypeName)
32
33// A macro to disallow all the implicit constructors, namely the
34// default constructor, copy constructor and operator= functions.
35//
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) \
41  TypeName();                                    \
42  DISALLOW_EVIL_CONSTRUCTORS(TypeName)
43
44
45#endif  // WEBRTC_BASE_CONSTRUCTORMAGIC_H_
46