F# Abstract Classes

by Online Tutorials Library July 14, 2022

F# Abstract Classes

Abstract classes are those which don’t provide full implementation of class members. It may contain non abstract methods. A class that inherits abstract class must provide implementation of all abstract methods of abstract class. Abstract classes are used to achieve abstraction.

Syntax:

 // Abstract class syntax. [<AbstractClass>] type [ accessibility-modifier ] abstract-class-name = [ inherit base-class-or-interface-name ] [ abstract-member-declarations-and-member-definitions ]  // Abstract member syntax. abstract member member-name : type-signature 

F# Abstract Class Example

 [] type AbstractClass() =   class   abstract member ShowClassName : unit -> unit  end  type DerivedClass()  =   class   inherit AbstractClass()   override this.ShowClassName() = printf “This is derived class.”  end  let a = new DerivedClass() a.ShowClassName() 

Output:

This is derived class.

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F# Abstract Classes

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