(* Copyright (C) 2002, 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://cs.unibo.it/helm/.
 *)

  (* proof engine status *)
val proof : ProofEngineTypes.proof option ref
val goal : ProofEngineTypes.goal option ref

  (* start a new goal undoing part of the proof *)
val perforate : Cic.context -> Cic.term -> Cic.term -> unit

  (* reduction tactics *)
val whd : Cic.term -> unit
val reduce : Cic.term -> unit
val simpl : Cic.term -> unit
val fold : Cic.term -> unit

  (* scratch area reduction tactics *)
val whd_in_scratch : Cic.term -> Cic.term -> Cic.term
val reduce_in_scratch : Cic.term -> Cic.term -> Cic.term
val simpl_in_scratch : Cic.term -> Cic.term -> Cic.term

  (* "primitive" tactics *)
val apply : Cic.term -> unit
val intros : unit -> unit
val cut : Cic.term -> unit
val letin : Cic.term -> unit
val exact : Cic.term -> unit
val elim_intros_simpl : Cic.term -> unit
val change : goal_input:Cic.term -> input:Cic.term -> unit

  (* structural tactics *)
val clearbody : Cic.hypothesis -> unit
val clear : Cic.hypothesis -> unit

  (* other tactics *)
val elim_type : Cic.term -> unit
val ring : unit -> unit
val fourier : unit -> unit
val rewrite_simpl : Cic.term -> unit