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Polymorphism

PreviousModularityNextAbstraction Qualities (cohesion, coupling, etc)

Last updated 5 years ago

Polymorphism is the provision of a single interface to entities of different types or the use of a single symbol to represent multiple different types.

The most commonly recognized major classes of polymorphism are:

  1. : defines a common interface for an arbitrary set of individually specified types (function overloading or operator overloading).

  2. : when one or more types are not specified by name but by abstract symbols that can represent any type (templates in C++ and D, generics in C# and Java).

  3. (also called subtype polymorphism or inclusion polymorphism): when a name denotes instances of many different classes related by some common superclass. (you can pass an object to a method that takes more generic type – )

Ad hoc polymorphism
Parametric polymorphism
Subtyping
Liskov substitution principle