Fix.NUMBERING
A fixed numbering of (a subset of) a type t.
t
type t
The type t of values of interest.
val n : int
n is the number of values of type t that have been encoded. The functions encode and decode represent an isomorphism between this subset of t and the interval [0..n).
n
encode
decode
[0..n)
val encode : t -> int
encode maps a value of type t to an integer code in the interval [0..n).
val decode : int -> t
decode maps an integer code in the interval [0..n) back to a value of type t.