You can search for identifiers within the package.
in-package search v0.2.0
type re = string
type t =
| Char of int
| Line of int
| ForwardRE of re
| BackwardRE of re
| Zero
| Dollar
| Dot
| Plus of t * t
| Minus of t * t
| Comma of t * t
| Semicolon of t * t
| Null
val p : t -> string