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Factory Pattern

Factory pattern in F#

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type IA = 
  abstract Action : unit -> unit

type Type = 
  | TypeA 
  | TypeB

let factory = function
  | TypeA -> { new IA with 
                   member this.Action() = printfn "type A" }
  | TypeB -> { new IA with 
                  member this.Action() = printfn "type B" }
abstract member IA.Action : unit -> unit

Full name: Script.IA.Action
type unit = Unit

Full name: Microsoft.FSharp.Core.unit
type Type =
  | TypeA
  | TypeB

Full name: Script.Type
union case Type.TypeA: Type
union case Type.TypeB: Type
val factory : _arg1:Type -> IA

Full name: Script.factory
type IA =
  interface
    abstract member Action : unit -> unit
  end

Full name: Script.IA
val this : IA
abstract member IA.Action : unit -> unit
val printfn : format:Printf.TextWriterFormat<'T> -> 'T

Full name: Microsoft.FSharp.Core.ExtraTopLevelOperators.printfn
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More information

Link:http://fssnip.net/7q
Posted:5 years ago
Author:Tao Liu
Tags: design patterns