--- /dev/null
+(* 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/.
+ *)
+
+(* $Id$ *)
+
+ (**
+ current proof (proof uri * metas * (in)complete proof * term to be prooved)
+ *)
+type proof = UriManager.uri option * Cic.metasenv * Cic.substitution * Cic.term * Cic.term * Cic.attribute list
+ (** current goal, integer index *)
+type goal = int
+type status = proof * goal
+
+let initial_status ty metasenv attrs =
+ let rec aux max = function
+ | [] -> max + 1
+ | (idx, _, _) :: tl ->
+ if idx > max then
+ aux idx tl
+ else
+ aux max tl
+ in
+ let newmeta_idx = aux 0 metasenv in
+ let _subst = [] in
+ let proof =
+ None, (newmeta_idx, [], ty) :: metasenv, _subst, Cic.Meta (newmeta_idx, []), ty, attrs
+ in
+ (proof, newmeta_idx)
+
+ (**
+ a tactic: make a transition from one status to another one or, usually,
+ raise a "Fail" (@see Fail) exception in case of failure
+ *)
+ (** an unfinished proof with the optional current goal *)
+type tactic = status -> proof * goal list
+
+ (** creates an opaque tactic from a status->proof*goal list function *)
+let mk_tactic t = t
+
+type reduction = Cic.context -> Cic.term -> Cic.term
+
+let const_lazy_term t =
+ (fun _ metasenv ugraph -> t, metasenv, ugraph)
+
+type lazy_reduction =
+ Cic.context -> Cic.metasenv -> CicUniv.universe_graph ->
+ reduction * Cic.metasenv * CicUniv.universe_graph
+
+let const_lazy_reduction red =
+ (fun _ metasenv ugraph -> red, metasenv, ugraph)
+
+type ('term, 'lazy_term) pattern =
+ 'lazy_term option * (string * 'term) list * 'term option
+
+type lazy_pattern = (Cic.term, Cic.lazy_term) pattern
+
+let hole = Cic.Implicit (Some `Hole)
+
+let conclusion_pattern t =
+ let t' =
+ match t with
+ | None -> None
+ | Some t -> Some (const_lazy_term t)
+ in
+ t',[], Some hole
+
+ (** tactic failure *)
+exception Fail of string Lazy.t
+
+ (**
+ calls the opaque tactic on the status
+ *)
+let apply_tactic t status =
+ let (uri,metasenv,subst,bo,ty, attrs), gl = t status in
+ match
+ CicRefine.pack_coercion_obj
+ (Cic.CurrentProof ("",metasenv,Cic.Rel ~-1,ty,[],attrs))
+ with
+ | Cic.CurrentProof (_,metasenv,_,ty,_, attrs) ->
+ (uri,metasenv,subst,bo,ty, attrs), gl
+ | _ -> assert false
+;;
+
+ (** constraint: the returned value will always be constructed by Cic.Name **)
+type mk_fresh_name_type =
+ Cic.metasenv -> Cic.context -> Cic.name -> typ:Cic.term -> Cic.name
+
+let goals_of_proof (_,metasenv,_subst,_,_,_) = List.map (fun (g,_,_) -> g) metasenv
+