How to downcast from obj to option?

Question

I have a function that takes a parameter of type object and needs to downcast it to an option.

member s.Bind(x : obj, rest) =
    let         


        

Answer 1

I am not certain why you need to get your input as obj, but if your input is an Option<_>, then it is easy:

member t.Bind (x : 'a option, rest : obj option -> 'b) =
    let x = // val x : obj option
        x
        |> Option.bind (box >> Some)
    rest x