X-Git-Url: http://git.nguyen.vg/gitweb/?p=tatoo.git;a=blobdiff_plain;f=src%2Fformula.mli;fp=src%2Fformula.mli;h=52e38b7a731ec8a34c76e9d47a22af10562a0e97;hp=0000000000000000000000000000000000000000;hb=b00bff88c7902e828804c06b7f9dc55222fdc84e;hpb=03b6a364e7240ca827585e7baff225a0aaa33bc6

diff --git a/src/formula.mli b/src/formula.mli
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+(***********************************************************************)
+(*                                                                     *)
+(*                               TAToo                                 *)
+(*                                                                     *)
+(*                     Kim Nguyen, LRI UMR8623                         *)
+(*                   Université Paris-Sud & CNRS                       *)
+(*                                                                     *)
+(*  Copyright 2010-2012 Université Paris-Sud and Centre National de la *)
+(*  Recherche Scientifique. All rights reserved.  This file is         *)
+(*  distributed under the terms of the GNU Lesser General Public       *)
+(*  License, with the special exception on linking described in file   *)
+(*  ../LICENSE.                                                        *)
+(*                                                                     *)
+(***********************************************************************)
+
+(*
+  Time-stamp: <Last modified on 2013-04-04 18:41:24 CEST by Kim Nguyen>
+*)
+
+module type ATOM =
+sig
+  type t
+  val neg : t -> t
+  include Hcons.Abstract with type t := t
+  include Common_sig.Printable with type t := t
+end
+
+type ('formula,'atom) expr =
+  | False
+  | True
+  | Or of 'formula * 'formula
+  | And of 'formula * 'formula
+  | Atom of 'atom
+
+(** View of the internal representation of a formula,
+    used for pattern matching *)
+
+module Make(P : ATOM) :
+sig
+  type t
+
+  (** Abstract type representing hashconsed formulae *)
+
+  val hash : t -> int
+  (** Hash function for formulae *)
+
+  val uid : t -> Uid.t
+  (** Returns a unique ID for formulae *)
+
+  val equal : t -> t -> bool
+  (** Equality over formulae *)
+
+  val expr : t -> (t,P.t) expr
+  (** Return a view of the formulae *)
+
+  val compare : t -> t -> int
+  (** Comparison of formulae *)
+
+  val print : Format.formatter -> t -> unit
+  (** Pretty printer *)
+
+  val is_true : t -> bool
+  (** [is_true f] tests whether the formula is the atom True *)
+
+  val is_false : t -> bool
+  (** [is_false f] tests whether the formula is the atom False *)
+
+  val true_ : t
+  (** Atom True *)
+
+  val false_ : t
+  (** Atom False *)
+
+  val atom_ : P.t -> t
+  (** [atom_ dir b q] creates a down_left or down_right atom for state
+      [q]. The atom is positive if [b == true].
+  *)
+
+  val not_ : t -> t
+  val or_ : t -> t -> t
+  val and_ : t -> t -> t
+  (** Boolean connective *)
+
+  val of_bool : bool -> t
+  (** Convert an ocaml Boolean value to a formula *)
+
+  val fold : (t -> 'a -> 'a) -> t -> 'a -> 'a
+  (** [fold f phi acc] folds [f] over the formula structure *)
+
+end