Tobe good citizens almost all classes should implement the followingmethods. If you don't have to define and implement any of the"required" methods they should still be represented in your classdefinition as comments. If you just let the compiler generate themwithout indicating through comments that you know that this is theintended behaviour, people might wonder about the possibility of anommision or oversight.
Ifyour class needs a constructor, make sure to provide one. You need oneif during the operation of the class it creates something or doessomething that needs to be undone when the object dies. This includescreating memory, opening file descriptors, opening transactions etc.
If the default constructor is sufficient add a comment indicating that the compiler-generated version will be used.
Ifyour default constructor has one or more optional arguments, add acomment indicating that it still functions as the default constructor.
Ifyour class is intended to be derived from by other classes then makethe destructor virtual. You should always make a destructor virtual forthe sake of future extensibility. Only make it non virtual if you'vegot a real good reason to do so.
Ifyour class is copyable, either define a copy constructor and assignmentoperator or add a comment indicating that the compiler-generatedversions will be used.
If your classobjects should not be copied, make the copy constructor and assignmentoperator private and don't define bodies for them. If you don't knowwhether the class objects should be copyable, then assume not until thecopy operations are needed.
Ifyour class is assignable, either define a assignment operator or add acomment indicating that the compiler-generated versions will be used.
Ifyour objects should not be assigned, make the assignment operatorprivate and don't define bodies for them. If you don't know whether theclass objects should be assignable, then assume not.
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