Module Lattices.Quadrivalent

type boolean =
  1. | Bottom
  2. | True
  3. | False
  4. | Top
include Datatype_sig.S with type t = boolean
type t = boolean
val equal : t -> t -> bool
val compare : t -> t -> int
val hash : t -> int
val pretty : Stdlib.Format.formatter -> t -> unit
val join : t -> t -> t
val includes_or_widen : previous:t -> t -> bool * t
val includes : t -> t -> bool
val widen : previous:t -> t -> t
val inter : t -> t -> t
val bottom : t
val is_bottom : t -> bool
val top : t
val singleton : bool -> boolean
val boolean_bottom : boolean
val of_bools : may_be_false:bool -> may_be_true:bool -> boolean
val to_bools : boolean -> bool * bool
val truth_value : boolean -> boolean
val convert_to_quadrivalent : boolean -> boolean