c# - 如何在 F# 代码中使用 Microsoft Coyote - 父类型中 protected 嵌套属性类型

Question

F# 和 C# 之间的语言差异是否阻止了从 F# 代码中使用 Microsoft Coyote？

因为 OnEventDoActionAttribute 是在继承类型 Microsoft.Coyote.Actors.Actor 中定义的，带有 protected 访问修饰符，看起来它仍然可以在继承的 Actor 类型中访问在 C# 中，但在 F# 中则不然。

Hello world 示例转换为 F#:

type SetupEvent(serverId : ActorId) =
    inherit Event()
    member this.ServerId = serverId

type PingEvent(callerId : ActorId) = 
    inherit Event()
    member this.Caller = callerId

type PongEvent() =
    inherit Event()

// both attribute spec fail
//[<Microsoft.Coyote.Actors.Actor.OnEventDoAction(typeof<PingEvent>, "HandlePing")>] // Error: The type 'OnEventDoActionAttribute' is not accessible from this code location
[<OnEventDoAction(typeof<PingEvent>, "HandlePing")>] // Error: The type 'OnEventDoAction' is not defined
type Server() =
    inherit Actor()

    member this.HandlePing(e : Event) =
        let ping = e :?> PingEvent
        printfn "Server handling ping"
        printfn "Server sending pong back to caller"
        this.SendEvent(ping.Caller, new PongEvent());

// both attribute spec fail
//[<Microsoft.Coyote.Actors.Actor.OnEventDoAction(typeof<PongEvent>, "HandlePong")>] // Error: The type 'OnEventDoActionAttribute' is not accessible from this code location
[<OnEventDoAction(typeof<PongEvent>, "HandlePong")>] // Error: The type 'OnEventDoAction' is not defined
type Client() =

    inherit Actor()

    let mutable serverId : ActorId = null

    override this.OnInitializeAsync(initialEvent : Event) : System.Threading.Tasks.Task =
        printfn "%A initializing" this.Id
        serverId <- (initialEvent :?> SetupEvent).ServerId
        printfn "%A sending ping event to server" this.Id
        this.SendEvent(serverId, new PingEvent(this.Id))
        base.OnInitializeAsync(initialEvent)

    member this.HandlePong() =
        printfn "%A received pong event" this.Id

[<Test>]
let Execute (runtime : IActorRuntime) =
    let serverId = runtime.CreateActor(typeof<Server>)
    runtime.CreateActor(typeof<Client>, new SetupEvent(serverId)) |> ignore
    runtime.CreateActor(typeof<Client>, new SetupEvent(serverId)) |> ignore
    runtime.CreateActor(typeof<Client>, new SetupEvent(serverId)) |> ignore

let runtime = RuntimeFactory.Create()
Execute(runtime) |> ignore
Console.ReadLine() |> ignore

不确定如何解决此问题。

直接试用代码的LINQPad文档URI:http://share.linqpad.net/a9rif7.linq

Answer 1

是的，它是为了减少作用域污染，并确保只有当您在 Visual Studio 中的有效位置使用这些类型时，您才能获得这些类型的智能感知。不过构建 F# 示例的想法很酷...