In overlapping polymorphism is it mandatory that the method of a parent class that will be superimposed on a subclass is abstract? Is there an exception for some OOP language?
Overlay polymorphism is required?
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asked by anonymous 04.01.2018 / 17:48
1 answer
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It is not obligatory and it is quite common that it is not. The only requirement is that it has the same signature .
Some languages can have a signature that only considers the name of the method, which is very easy.
Each language can do as you wish, but I do not know anything that requires this.
What exists is that in a given construct in some languages, such as the interface, it requires the method to be abstract, but not in a parent class. C ++ has no interfaces.
Of course, every abstract method needs to be superimposed. It might not require it, but there would be no point in having all this mechanism.
04.01.2018 / 17:54