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
