Question

这是here中的有效示例：

type MethodExample() = 

    // standalone method
    member this.AddOne x = 
        x + 1

    // calls another method
    member this.AddTwo x = 
        this.AddOne x |> this.AddOne

这就是我想要做的：

type IMethod =   
    abstract member  AddOne: a:int -> int
    abstract member  AddTwo: a:int -> int

type MethodExample() =     
    interface IMethod with

        member this.AddOne x = 
            x + 1

        // calls another method
        member this.AddTwo x = 
            this.AddOne x |> this.AddOne

AddOne功能不可用，我也尝试将其向下转换为MethodExample，但它很可怕，无法正常工作。

我该怎么办？

Answer 1

在F＃中，所有接口实现都是私有的-意味着接口方法也不会像C＃中那样作为类的公共方法出现。它们只能通过界面访问。

因此，为了访问它们，您需要首先将类强制转换为接口：

member this.AddTwo x = 
    let me = this :> IMethod
    me.AddOne x |> me.AddOne

实现接口时，F＃从另一种类型的函数调用成员函数

1 个答案: