F# Discriminated Unions Enum-style unions
Example
Type information does not need to be included in the cases of a discriminated union. By omitting type information you can create a union that simply represents a set of choices, similar to an enum.
// This union can represent any one day of the week but none of
// them are tied to a specific underlying F# type
type DayOfWeek = Monday | Tuesday | Wednesday | Thursday | Friday | Saturday | Sunday
