I am confused as to what the problems could be if a constructor was inherited from a base class. Cpp Primer Plus says,
Constructors are different from other class methods in that they create new objects, whereas other methods are invoked by existing objects. This is one reason constructors aren’t inherited. Inheritance means a derived object can use a base-class method, but, in the case of constructors, the object doesn’t exist until after the constructor has done its work.
I understand the constructor is called before object construction is completed.
How can it lead to problems if a child class inherits (By inheriting I mean the child class is able to override the parent class method etc. Not just accessing the parent class method) the parent constructor?
I understand there is no necessity of explicitly calling a constructor from within a code[not that I am aware of as yet.] except while creating objects. Even then you can do so using some mechanism to invoke the parent constuctor [ In cpp, using
:: or using
member initialiser list, In java using
super]. In Java there is an enforcement to call it in the 1st line, I understand that is to ensure the parent object is created first and then the child object construction proceeds.
It can overrride it. But, I can't come up with situations where this can pose a problem. If the child does inherit the parent constructor what can go wrong?
So is this just to keep away from inheriting unecessary functions. Or is there more to it?