Nested union types in F#

Question

Is there any way to crate nested union types in F#? Something like this

type MainType =
    | A of
        | AA of int
        | AB of float
    | B of int   

Answer 1

No, I don't think so. The doesn't seem to be much advantage over creating two separate union types like:

type NestedType =
| AA of int
| AB of float

type MainType =
| A of NestedType
| B of int

let mainValue = A (AA 1)