How to enumerate an enum/type in F#

Question

I\'ve got an enumeration type defined like so:

type tags = 
    | ART  = 0
    | N    = 1
    | V    = 2 
    | P    = 3
    | NULL = 4

is

Answer 1

To make it an enum you need to explicitly give values to each case, otherwise it's a union type:

type tags = 
    | ART = 0
    | N = 1
    | V = 2
    | P = 3
    | NULL= 4
let allTags = System.Enum.GetValues(typeof)