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