* http://cs.unibo.it/helm/.
*)
-(** DEBUGGING *)
-
- (** perform debugging output? *)
-let debug = false
-let debug_print = fun _ -> ()
-
- (** debugging print *)
-let warn s =
- if debug then
- debug_print ("DECOMPOSE: " ^ s)
-
-
+module C = Cic
+module P = PrimitiveTactics
+module T = Tacticals
+module S = ProofEngineStructuralRules
+module F = FreshNamesGenerator
+module E = ProofEngineTypes
+module H = ProofEngineHelpers
+module Q = MetadataQuery
(*
let induction_tac ~term status =
;;
*)
-let elim_type_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[])
+(* unexported tactics *******************************************************)
+
+let get_name context index =
+ try match List.nth context (pred index) with
+ | Some (Cic.Name name, _) -> Some name
+ | _ -> None
+ with Invalid_argument "List.nth" -> None
+
+let rec scan_tac ~old_context_length ~index ~tactic =
+ let scan_tac status =
+ let (proof, goal) = status in
+ let _, metasenv, _, _ = proof in
+ let _, context, _ = CicUtil.lookup_meta goal metasenv in
+ let context_length = List.length context in
+ let rec aux index =
+ match get_name context index with
+ | _ when index <= 0 -> (proof, [goal])
+ | None -> aux (pred index)
+ | Some what ->
+ let tac = T.then_ ~start:(tactic ~what)
+ ~continuation:(scan_tac ~old_context_length:context_length ~index ~tactic)
+ in
+ try E.apply_tactic tac status
+ with E.Fail _ -> aux (pred index)
+ in aux (index + context_length - old_context_length - 1)
+ in
+ E.mk_tactic scan_tac
+
+let rec check_inductive_types types = function
+ | C.MutInd (uri, typeno, _) -> List.mem (uri, typeno) types
+ | C.Appl (hd :: tl) -> check_inductive_types types hd
+ | _ -> false
+
+let elim_clear_tac ~mk_fresh_name_callback ~types ~what =
+ let elim_clear_tac status =
+ let (proof, goal) = status in
+ let _, metasenv, _, _ = proof in
+ let _, context, _ = CicUtil.lookup_meta goal metasenv in
+ let index, ty = H.lookup_type metasenv context what in
+ if check_inductive_types types ty then
+ let tac = T.then_ ~start:(P.elim_intros_tac ~mk_fresh_name_callback (C.Rel index))
+ ~continuation:(S.clear what)
+ in
+ E.apply_tactic tac status
+ else raise (E.Fail "unexported elim_clear: not an eliminable type")
+ in
+ E.mk_tactic elim_clear_tac
+
+(* elim type ****************************************************************)
+
+let elim_type_tac ?(mk_fresh_name_callback = F.mk_fresh_name ~subst:[])
?depth ?using what =
- let elim_type_tac status =
- let module C = Cic in
- let module P = PrimitiveTactics in
- let module T = Tacticals in
- ProofEngineTypes.apply_tactic
- (T.thens
- ~start: (P.cut_tac what)
- ~continuations:[ P.elim_intros_simpl_tac ?depth ?using ~mk_fresh_name_callback (C.Rel 1) ; T.id_tac ])
- status
- in
- ProofEngineTypes.mk_tactic elim_type_tac
-;;
+ let elim what = P.elim_intros_simpl_tac ?using ?depth ~mk_fresh_name_callback what in
+ let elim_type_tac status =
+ let tac = T.thens ~start: (P.cut_tac what)
+ ~continuations:[elim (C.Rel 1); T.id_tac]
+ in
+ E.apply_tactic tac status
+ in
+ E.mk_tactic elim_type_tac
+(* decompose ****************************************************************)
-(* Decompose related stuff *)
+(* robaglia --------------------------------------------------------------- *)
-exception InteractiveUserUriChoiceNotRegistered
+ (** perform debugging output? *)
+let debug = false
+let debug_print = fun _ -> ()
-let interactive_user_uri_choice =
- (ref (fun ~selection_mode -> raise InteractiveUserUriChoiceNotRegistered) :
- (selection_mode:[`SINGLE | `EXTENDED] ->
- ?ok:string ->
- ?enable_button_for_non_vars:bool ->
- title:string -> msg:string -> string list -> string list) ref)
-;;
+ (** debugging print *)
+let warn s =
+ if debug then
+ debug_print ("DECOMPOSE: " ^ s)
-let decompose_tac ?(uris_choice_callback=(function l -> l)) term =
- let decompose_tac uris_choice_callback term status =
- let (proof, goal) = status in
- let module C = Cic in
- let module R = CicReduction in
- let module P = PrimitiveTactics in
- let module T = Tacticals in
- let module S = ProofEngineStructuralRules in
- let _,metasenv,_,_ = proof in
- let _,context,ty = CicUtil.lookup_meta goal metasenv in
- let old_context_len = List.length context in
- let termty,_ =
- CicTypeChecker.type_of_aux' metasenv context term CicUniv.empty_ugraph in
- let rec make_list termty =
- (* N.B.: altamente inefficente? *)
- let rec search_inductive_types urilist termty =
- (* search in term the Inductive Types and return a list of uris as triples like this: (uri,typeno,exp_named_subst) *)
- match termty with
- (C.MutInd (uri,typeno,exp_named_subst)) (* when (not (List.mem (uri,typeno,exp_named_subst) urilist)) *) ->
- (uri,typeno,exp_named_subst)::urilist
- | (C.Appl ((C.MutInd (uri,typeno,exp_named_subst))::applist)) (* when (not (List.mem (uri,typeno,exp_named_subst) urilist)) *) ->
- (uri,typeno,exp_named_subst)::(List.fold_left search_inductive_types urilist applist)
- | _ -> urilist
- (* N.B: in un caso tipo (and A forall C:Prop.(or B C)) l'or *non* viene selezionato! *)
- in
- let rec purge_duplicates urilist =
- let rec aux triple urilist =
- match urilist with
- [] -> []
- | hd::tl ->
- if (hd = triple)
- then aux triple tl
- else hd::(aux triple tl)
- in
- match urilist with
- [] -> []
- | hd::tl -> hd::(purge_duplicates (aux hd tl))
- in
- purge_duplicates (search_inductive_types [] termty)
+(* search in term the Inductive Types and return a list of uris as triples like this: (uri,typeno,exp_named_subst) *)
+let search_inductive_types ty =
+ let rec aux types = function
+ | C.MutInd (uri, typeno, _) when (not (List.mem (uri, typeno) types)) ->
+ (uri, typeno) :: types
+ | C.Appl applist -> List.fold_left aux types applist
+ | _ -> types
+ in
+ aux [] ty
+(* N.B: in un caso tipo (and A forall C:Prop.(or B C)) l'or *non* viene selezionato! *)
+
+(* roba seria ------------------------------------------------------------- *)
+
+let decompose_tac ?(mk_fresh_name_callback = F.mk_fresh_name ~subst:[])
+ ?(user_types=[]) ~dbd what =
+ let decompose_tac status =
+ let (proof, goal) = status in
+ let _, metasenv,_,_ = proof in
+ let _, context, _ = CicUtil.lookup_meta goal metasenv in
+ let types = List.rev_append user_types (Q.decomposables dbd) in
+ let tactic = elim_clear_tac ~mk_fresh_name_callback ~types in
+ let old_context_length = List.length context in
+ let tac = T.then_ ~start:(tactic ~what)
+ ~continuation:(scan_tac ~old_context_length ~index:1 ~tactic)
in
+ E.apply_tactic tac status
+ in
+ E.mk_tactic decompose_tac
+
+(*
+module R = CicReduction
- let urilist =
- (* list of triples (uri,typeno,exp_named_subst) of Inductive Types found in term and chosen by the user *)
- (* N.B.: due to a bug in uris_choice_callback exp_named_subst are not significant (they all are []) *)
- uris_choice_callback (make_list termty) in
-
- let rec elim_clear_tac ~term' ~nr_of_hyp_still_to_elim status =
+ let rec elim_clear_tac ~term' ~nr_of_hyp_still_to_elim status =
let (proof, goal) = status in
warn ("nr_of_hyp_still_to_elim=" ^ (string_of_int nr_of_hyp_still_to_elim));
if nr_of_hyp_still_to_elim <> 0 then
in
elim_clear_tac ~term':term ~nr_of_hyp_still_to_elim:1 status
- in
- ProofEngineTypes.mk_tactic (decompose_tac uris_choice_callback term)
-;;
-
-
+*)
projects / helm.git / blobdiff