File: Animals.fs

package info (click to toggle)
mono 6.12.0.199%2Bds-4
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 1,273,192 kB
  • sloc: cs: 11,181,844; xml: 2,850,076; ansic: 689,413; cpp: 123,344; perl: 59,361; javascript: 30,841; asm: 21,845; makefile: 19,951; sh: 15,030; python: 4,771; pascal: 925; sql: 859; sed: 16; php: 1
file content (17 lines) | stat: -rw-r--r-- 403 bytes parent folder | download | duplicates (7) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
module Animals

// Call a base class from a derived one.
type Animal() =
    member __.Rest() = ()

type Dog() =
    inherit Animal()
    member __.Run() =
        base.Rest()

// Upcasting is denoted by :> operator.
let dog = Dog() 
let animal = dog :> Animal

//Dynamic downcasting (:?>) might throw an InvalidCastException if the cast doesn't succeed at runtime.
let shouldBeADog = animal :?> Dog