相关疑难解决方法(0)

假设我有一个带有索引器的类型A,例如类型A是一个库.现在我想扩展它的索引器,例如在这里我想在索引器中添加浮点数.

我制定了以下代码:

type A(a:int array) = 
  member this.Item
    with get(x) = a.[x]
    and  set(x) value = a.[x] <- value

type A with
    member m.Item with
     get(x:float) = m.[x |> int]
     and  set(x:float) v = m.[x |> int] <- v

但它似乎不起作用:

let a = A([| 1;2;3 |])
a.[1]
a.[1] <- 10

a.[1.0]

对于最后一行,我得到:

Script1.fsx(243,4): error FS0001: This expression was expected to have type
    int    
but here has type
    float    

是否可以在F#中扩展索引器？谢谢!