-
-exception NotConvertible
+(* 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 ref
-val goal : ProofEngineTypes.goal ref
+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
val reduce : Cic.term -> unit
val simpl : Cic.term -> unit
val fold : Cic.term -> unit
-val change : goal_input:Cic.term -> input:Cic.term -> unit
(* scratch area reduction tactics *)
val whd_in_scratch : Cic.term -> Cic.term -> Cic.term
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
(* other tactics *)
val elim_type : Cic.term -> unit
val ring : unit -> unit
-
+val fourier : unit -> unit
+val rewrite_simpl : Cic.term -> unit