从C#调用F#对象的接口方法

Question

给定F#类型:

type Foo() =
    member this.Prop with get() = ()

    interface IDisposable with
        member this.Dispose() = ()

在C#中,我创建了对象,但我无法调用Dispose():

var x = new Foo();
x.Dispose(); // compile error, x does not contain a definition of Dispose

但是,我可以写:

((IDisposable)x).Dispose(); // works, but I don't like the cast

有没有办法避免C#中的强制转换？这是关系到道路F#并不会自动让你叫.Dispose()的Foo类型从F#中？

Answer 1

默认情况下,F#中的接口实现是显式的.因此,除非从转换为界面的类型(某种形式的铸造)中看到,否则这些方法是不可见的.

要解决此问题,请公开一个与接口版本具有相同签名的实例方法.然后将接口转发到实例函数.例如

type Foo() =
    member this.Prop with get() = ()
    member this.Dispose() = ()

    interface IDisposable with
        member this.Dispose() = this.Dispose()