1/*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef TALK_BASE_CONSTRUCTORMAGIC_H_
29#define TALK_BASE_CONSTRUCTORMAGIC_H_
30
31#define DISALLOW_ASSIGN(TypeName) \
32  void operator=(const TypeName&)
33
34// A macro to disallow the evil copy constructor and operator= functions
35// This should be used in the private: declarations for a class
36#define DISALLOW_COPY_AND_ASSIGN(TypeName)    \
37  TypeName(const TypeName&);                    \
38  DISALLOW_ASSIGN(TypeName)
39
40// Alternative, less-accurate legacy name.
41#define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \
42  DISALLOW_COPY_AND_ASSIGN(TypeName)
43
44// A macro to disallow all the implicit constructors, namely the
45// default constructor, copy constructor and operator= functions.
46//
47// This should be used in the private: declarations for a class
48// that wants to prevent anyone from instantiating it. This is
49// especially useful for classes containing only static methods.
50#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
51  TypeName();                                    \
52  DISALLOW_EVIL_CONSTRUCTORS(TypeName)
53
54
55#endif  // TALK_BASE_CONSTRUCTORMAGIC_H_
56