+(* Copyright (C) 2006, 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/.
+ *)
+
let assume id t =
- Tacticals.then_
- ~start:
- (Tactics.intros ~howmany:1
- ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id) ())
- ~continuation:
- (Tactics.change ~pattern:(None,[id,Cic.Implicit (Some `Hole)],None)
- (fun _ metasenv ugraph -> t,metasenv,ugraph))
+ Tacticals.then_
+ ~start:
+ (Tactics.intros ~howmany:1
+ ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id) ())
+ ~continuation:
+ (Tactics.change ~pattern:(None,[id,Cic.Implicit (Some `Hole)],None)
+ (fun _ metasenv ugraph -> t,metasenv,ugraph))
;;
-let suppose t id =
+let suppose t id ty =
+(*BUG: check on t missing *)
+ let ty = match ty with None -> t | Some ty -> ty in
Tacticals.then_
~start:
- (Tactics.intros ~howmany:1
- ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id) ())
+ (Tactics.intros ~howmany:1
+ ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id) ())
~continuation:
- (Tactics.change ~pattern:(None,[id,Cic.Implicit (Some `Hole)],None)
- (fun _ metasenv ugraph -> t,metasenv,ugraph))
+ (Tactics.change ~pattern:(None,[id,Cic.Implicit (Some `Hole)],None)
+ (fun _ metasenv ugraph -> ty,metasenv,ugraph))
;;
-let by_term_we_proved t ty id =
- Tacticals.thens
- ~start:
- (Tactics.cut ty
- ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id))
- ~continuations:
- [ Tacticals.id_tac ; Tactics.apply t ]
+let by_term_we_proved ~dbd t ty id ty' =
+ let just =
+ match t with
+ None -> Tactics.auto ~dbd ~params:[]
+ | Some t -> Tactics.apply t
+ in
+ let continuation =
+ match ty' with
+ None -> Tacticals.id_tac
+ | Some ty' ->
+ Tactics.change ~pattern:(None,[id,Cic.Implicit (Some `Hole)],None)
+ (fun _ metasenv ugraph -> ty',metasenv,ugraph)
+ in
+ Tacticals.thens
+ ~start:
+ (Tactics.cut ty
+ ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id))
+ ~continuations:[ continuation ; just ]
;;
-let bydone t =
- (Tactics.apply ~term:t)
-
+let bydone ~dbd t =
+ let just =
+ match t with
+ None -> Tactics.auto ~dbd ~params:[]
+ | Some t -> Tactics.apply t
+ in
+ just
;;
-let we_need_to_prove t id =
+let we_need_to_prove t id ty =
let aux status =
+ let cont,cutted =
+ match ty with
+ None -> Tacticals.id_tac,t
+ | Some ty ->
+ Tactics.change ~pattern:(None,[id,Cic.Implicit (Some `Hole)],None)
+ (fun _ metasenv ugraph -> t,metasenv,ugraph), ty in
let proof,goals =
ProofEngineTypes.apply_tactic
- (Tactics.cut t
- ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id))
+ (Tacticals.thens
+ ~start:
+ (Tactics.cut cutted
+ ~mk_fresh_name_callback:(fun _ _ _ ~typ -> Cic.Name id))
+ ~continuations:[cont])
status
in
let goals' =
in
ProofEngineTypes.mk_tactic aux
;;
+
+let existselim t id1 t1 id2 t2 =
+(*BUG: t1 and t2 not used *)
+(*PARSING BUG: t2 is parsed in the current context, but it may
+ have occurrences of id1 in it *)
+ Tactics.elim_intros t
+ ~mk_fresh_name_callback:
+ (let i = ref 0 in
+ fun _ _ _ ~typ ->
+ incr i;
+ if !i = 1 then Cic.Name id1 else Cic.Name id2)
+
+let andelim = existselim;;
+
+let rewritingstep ~dbd lhs rhs just conclude =
+ let aux ((proof,goal) as status) =
+ let (curi,metasenv,proofbo,proofty) = proof in
+ let _,context,_ = CicUtil.lookup_meta goal metasenv in
+ let eq,trans =
+ match LibraryObjects.eq_URI () with
+ None -> raise (ProofEngineTypes.Fail (lazy "You need to register the default equality first. Please use the \"default\" command"))
+ | Some uri ->
+ Cic.MutInd (uri,0,[]), Cic.Const (LibraryObjects.trans_eq_URI ~eq:uri,[])
+ in
+ let ty,_ =
+ CicTypeChecker.type_of_aux' metasenv context rhs CicUniv.empty_ugraph in
+ let just =
+ match just with
+ None ->
+ Tactics.auto ~dbd
+ ~params:["paramodulation","on"; "timeout","3"]
+ | Some just -> Tactics.apply just
+ in
+ match lhs with
+ None ->
+ let plhs,prhs =
+ match
+ fst
+ (CicTypeChecker.type_of_aux' metasenv context (Cic.Rel 1)
+ CicUniv.empty_ugraph)
+ with
+ Cic.Appl [_;_;plhs;prhs] -> plhs,prhs
+ | _ -> assert false in
+ let last_hyp_name =
+ match context with
+ (Some (Cic.Name id,_))::_ -> id
+ | _ -> assert false
+ in
+ (match conclude with
+ None ->
+ ProofEngineTypes.apply_tactic
+ (Tacticals.thens
+ ~start:(Tactics.apply ~term:trans)
+ ~continuations:
+ [ Tactics.apply prhs ;
+ Tactics.apply (Cic.Rel 1) ;
+ just]) status
+ | Some name ->
+ let mk_fresh_name_callback =
+ fun metasenv context _ ~typ ->
+ FreshNamesGenerator.mk_fresh_name ~subst:[]
+ metasenv context name ~typ
+ in
+ ProofEngineTypes.apply_tactic
+ (Tacticals.thens
+ ~start:(Tactics.cut ~mk_fresh_name_callback
+ (Cic.Appl [eq ; ty ; plhs ; rhs]))
+ ~continuations:
+ [ Tactics.clear ~hyps:[last_hyp_name] ;
+ Tacticals.thens
+ ~start:(Tactics.apply ~term:trans)
+ ~continuations:
+ [ Tactics.apply prhs ;
+ Tactics.apply (Cic.Rel 1) ;
+ just]
+ ]) status)
+ | Some lhs ->
+ match conclude with
+ None -> ProofEngineTypes.apply_tactic just status
+ | Some name ->
+ let mk_fresh_name_callback =
+ fun metasenv context _ ~typ ->
+ FreshNamesGenerator.mk_fresh_name ~subst:[]
+ metasenv context name ~typ
+ in
+ ProofEngineTypes.apply_tactic
+ (Tacticals.thens
+ ~start:
+ (Tactics.cut ~mk_fresh_name_callback
+ (Cic.Appl [eq ; ty ; lhs ; rhs]))
+ ~continuations:[ Tacticals.id_tac ; just ]) status
+ in
+ ProofEngineTypes.mk_tactic aux
+;;
+
+let we_proceed_by_induction_on t pat =
+ (*BUG here: pat unused *)
+ Tactics.elim_intros ~depth:0 t
+;;
+
+let case id ~params =
+ (*BUG here: id unused*)
+ (*BUG here: it does not verify that the previous branch is closed *)
+ (*BUG here: the params should be parsed telescopically*)
+ (*BUG here: the tactic_terms should be terms*)
+ let rec aux ~params ((proof,goal) as status) =
+ match params with
+ [] -> proof,[goal]
+ | (id,t)::tl ->
+ match ProofEngineTypes.apply_tactic (assume id t) status with
+ proof,[goal] -> aux tl (proof,goal)
+ | _ -> assert false
+ in
+ ProofEngineTypes.mk_tactic (aux ~params)
+;;
+
+let thesisbecomes t =
+let ty = None in
+ (*BUG here: missing check on t *)
+ match ty with
+ None -> Tacticals.id_tac
+ | Some ty ->
+ Tactics.change ~pattern:(None,[],Some (Cic.Implicit (Some `Hole)))
+ (fun _ metasenv ugraph -> ty,metasenv,ugraph)
+;;
+
+let byinduction t id = suppose t id None;;
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