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 #define DISALLOW_ASSIGN(TypeName) \ 15 void operator=(const TypeName&) 16 17 // A macro to disallow the evil copy constructor and operator= functions 18 // This should be used in the private: declarations for a class. 19 // Undefine this, just in case. Some third-party includes have their own 20 // version. 21 #undef DISALLOW_COPY_AND_ASSIGN 22 #define DISALLOW_COPY_AND_ASSIGN(TypeName) \ 23 TypeName(const TypeName&); \ 24 DISALLOW_ASSIGN(TypeName) 25 26 // Alternative, less-accurate legacy name. 27 #define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \ 28 DISALLOW_COPY_AND_ASSIGN(TypeName) 29 30 // A macro to disallow all the implicit constructors, namely the 31 // default constructor, copy constructor and operator= functions. 32 // 33 // This should be used in the private: declarations for a class 34 // that wants to prevent anyone from instantiating it. This is 35 // especially useful for classes containing only static methods. 36 #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \ 37 TypeName(); \ 38 DISALLOW_EVIL_CONSTRUCTORS(TypeName) 39 40 41 #endif // WEBRTC_BASE_CONSTRUCTORMAGIC_H_ 42
