f＃覆盖数组访问运算符。[]

Question

在F＃中，我想创建一种索引数组，因此我可以通过.[i]或.[index_names]以及带有索引..的切片表示法访问该元素是否可以像这样覆盖.[]？感谢。

Answer 1

在您的类型中定义重载的索引器：

type MyIndexedArray<'T>() = 
    member this.Item(i : int) : 'T = Unchecked.defaultof<_>
    member this.Item(name : string) : 'T = Unchecked.defaultof<_>
    member this.GetSlice(a : int option, b : int option) : 'T = Unchecked.defaultof<_>

let arr = new MyIndexedArray<int>()
let a = arr.[1]
let b = arr.["name"]
let c = arr.[1..2]
let d = arr.[1..]
let e = arr.[..3]
let f = arr.[*]