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module Inheritance
//The following code example illustrates the declaration of
// a new virtual method function1 in a base class
// and how to override it in a derived class.
type MyClassBase1() =
let mutable z = 0
abstract member function1 : int -> int
default u.function1(a : int) = z <- z + a; z
type MyClassDerived1() =
inherit MyClassBase1()
override u.function1(a: int) = a + 1
//The following code shows a base class and a derived class,
// where the derived class calls the base class constructor in the inherit clause:+
type MyClassBase2(x: int) =
let mutable z = x * x
do for i in 1..z do printf "%d " i
type MyClassDerived2(y: int) =
inherit MyClassBase2(y * 2)
do for i in 1..y do printf "%d " i
//In the case of multiple constructors, the following code can be used.
// The first line of the derived class constructors is the inherit clause,
// and the fields appear as explicit fields that are declared with the val keyword.
// For more information, see Explicit Fields: The val Keyword.
type BaseClass =
val string1 : string
new (str) = { string1 = str }
new () = { string1 = "" }
type DerivedClass =
inherit BaseClass
val string2 : string
new (str1, str2) = { inherit BaseClass(str1); string2 = str2 }
new (str2) = { inherit BaseClass(); string2 = str2 }
let obj1 = DerivedClass("A", "B")
let obj2 = DerivedClass("A")
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