(* Copyright (C) 2004, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * HELM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://helm.cs.unibo.it/
 *)

class proofStatus: uri:UriManager.uri -> typ:Cic.term ->
  object
    inherit MatitaTypes.subject

      (** {3 properties} *)

    method proof: ProofEngineTypes.proof
    method setProof: ProofEngineTypes.proof -> unit

    method goal: ProofEngineTypes.goal option
    method setGoal: ProofEngineTypes.goal option -> unit

      (** @raise MatitaTypes.No_proof *)
    method status: ProofEngineTypes.status (* proof, goal *)
    method setStatus: ProofEngineTypes.status -> unit

      (** {3 actions} *)

    (** return a pair of "xml" (as defined in Xml module) representing the *
     * current proof type and body, respectively *)
    method to_xml: Xml.token Stream.t * Xml.token Stream.t
  end

class proof: uri:UriManager.uri -> typ:Cic.term ->
  object
      (** {3 status} *)
    method status: proofStatus
    method setStatus: proofStatus -> unit
  end

(** {2 tactic commands builders} *)

(* TODO Zack: these are just some examples, a lot of other tactics/tacticals
 * must be added here *)

val intros: ?namer:MatitaTypes.namer ->
                  proofStatus -> MatitaTypes.command

val reflexivity:  proofStatus -> MatitaTypes.command
val symmetry:     proofStatus -> MatitaTypes.command
val transitivity: Cic.term -> proofStatus -> MatitaTypes.command

val exists:       proofStatus -> MatitaTypes.command
val split:        proofStatus -> MatitaTypes.command
val left:         proofStatus -> MatitaTypes.command
val right:        proofStatus -> MatitaTypes.command

val assumption:   proofStatus -> MatitaTypes.command