F谜语:如何调用方法的重载?

下面是F部分的答案:

MyClass.Overload1(1,2)
MyClass.Overload1<_,_>(unbox (box (1,2)) : System.Tuple<int,int>)
MyClass.Overload1 1

嗯,我不清楚是否可以调用f“pam”方法。但剩下的就在这里。

C:

using System;
namespace CSharp
{
    public class MyClass
    {
        public static string Overload1<a, b>(a x, b y) { return "Pim"; }
        public static string Overload1<a, b>(Tuple<a, b> x) { return "Pam"; }
        public static string Overload1<a>(a x) { return "Pum"; }
    }
}

F:

namespace FSharp

type MyClass =
    static member Overload1 (x, y) = "Pim"
    static member Overload1 (x : System.Tuple<_, _>) = "Pam"
    static member Overload1 x = "Pum"

namespace DoIt

module Examples =
    let CallFSharp() =
        printfn "%s" <| FSharp.MyClass.Overload1(1,2)   // Pim
        printfn "%s" <| FSharp.MyClass.Overload1((1,2)) // Pum!
        printfn "%s" <| FSharp.MyClass.Overload1(())    // Pum


    let CallCSharp() =
        printfn "%s" <| CSharp.MyClass.Overload1(1,2)             // Pim
        printfn "%s" <| CSharp.MyClass.Overload1<int,int>((1,2))  // Pam
        printfn "%s" <| CSharp.MyClass.Overload1(())              // Pum

    do
        CallFSharp()        
        CallCSharp()        

当然,在实践中,很难看到IL中的方法 System.Tuple<...> 对象作为参数。