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28 #ifndef TALK_BASE_CONSTRUCTORMAGIC_H_
29 #define TALK_BASE_CONSTRUCTORMAGIC_H_
31 #define DISALLOW_ASSIGN(TypeName) \
32 void operator=(const TypeName&)
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 // Undefine this, just in case. Some third-party includes have their own
38 #undef DISALLOW_COPY_AND_ASSIGN
39 #define DISALLOW_COPY_AND_ASSIGN(TypeName) \
40 TypeName(const TypeName&); \
41 DISALLOW_ASSIGN(TypeName)
43 // Alternative, less-accurate legacy name.
44 #define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \
45 DISALLOW_COPY_AND_ASSIGN(TypeName)
47 // A macro to disallow all the implicit constructors, namely the
48 // default constructor, copy constructor and operator= functions.
50 // This should be used in the private: declarations for a class
51 // that wants to prevent anyone from instantiating it. This is
52 // especially useful for classes containing only static methods.
53 #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
55 DISALLOW_EVIL_CONSTRUCTORS(TypeName)
58 #endif // TALK_BASE_CONSTRUCTORMAGIC_H_