module E = ProofEngineTypes
module H = ProofEngineHelpers
-(*
-let induction_tac ~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 module U = UriManager in
- let (_,metasenv,_,_) = proof in
- let _,context,ty = CicUtil.lookup_meta goal metasenv in
- let termty = CicTypeChecker.type_of_aux' metasenv context term in (* per ora non serve *)
-
- T.then_ ~start:(T.repeat_tactic
- ~tactic:(T.then_ ~start:(VariousTactics.generalize_tac ~term) (* chissa' se cosi' funziona? *)
- ~continuation:(P.intros))
- ~continuation:(P.elim_intros_simpl ~term)
- status
-;;
-*)
-
(* 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 _, context, _ = CicUtil.lookup_meta goal metasenv in
let context_length = List.length context in
let rec aux index =
- match get_name context index with
+ match H.get_name context index with
| _ when index <= 0 -> (proof, [goal])
| None -> aux (pred index)
| Some what ->
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)
+ ~continuation:(S.clear [what])
in
E.apply_tactic tac status
else raise (E.Fail (lazy "unexported elim_clear: not an eliminable type"))
(* roba seria ------------------------------------------------------------- *)
let decompose_tac ?(mk_fresh_name_callback = F.mk_fresh_name ~subst:[])
- ?(user_types=[]) ~dbd what =
+ ?(user_types=[]) ?what ~dbd =
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 (FwdQueries.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)
+ let old_context_length = List.length context in
+ let tac = match what with
+ | Some what ->
+ T.then_ ~start:(tactic ~what)
+ ~continuation:(scan_tac ~old_context_length ~index:1 ~tactic)
+ | None ->
+ scan_tac ~old_context_length ~index:old_context_length ~tactic
in
E.apply_tactic tac status
in
E.mk_tactic decompose_tac
-
-(*
-module R = CicReduction
-
- let rec elim_clear_tac ~term' ~nr_of_hyp_still_to_elim status =
- let (proof, goal) = status in
- warn (lazy ("nr_of_hyp_still_to_elim=" ^ (string_of_int nr_of_hyp_still_to_elim)));
- if nr_of_hyp_still_to_elim <> 0 then
- let _,metasenv,_,_ = proof in
- let _,context,_ = 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
- warn (lazy ("elim_clear termty= " ^ CicPp.ppterm termty));
- match termty with
- C.MutInd (uri,typeno,exp_named_subst)
- | C.Appl((C.MutInd (uri,typeno,exp_named_subst))::_)
- when (List.mem (uri,typeno,exp_named_subst) urilist) ->
- warn (lazy ("elim " ^ CicPp.ppterm termty));
- ProofEngineTypes.apply_tactic
- (T.then_
- ~start:(P.elim_intros_simpl_tac term')
- ~continuation:(
- (* clear the hyp that has just been eliminated *)
- ProofEngineTypes.mk_tactic (fun status ->
- let (proof, goal) = status in
- let _,metasenv,_,_ = proof in
- let _,context,_ = CicUtil.lookup_meta goal metasenv in
- let new_context_len = List.length context in
- warn (lazy ("newcon=" ^ (string_of_int new_context_len) ^ " & oldcon=" ^ (string_of_int old_context_len) ^ " & old_nr_of_hyp=" ^ (string_of_int nr_of_hyp_still_to_elim)));
- let new_nr_of_hyp_still_to_elim = nr_of_hyp_still_to_elim + (new_context_len - old_context_len) - 1 in
- let hyp_name =
- match List.nth context new_nr_of_hyp_still_to_elim with
- None
- | Some (Cic.Anonymous,_) -> assert false
- | Some (Cic.Name name,_) -> name
- in
- ProofEngineTypes.apply_tactic
- (T.then_
- ~start:(
- if (term'==term) (* if it's the first application of elim, there's no need to clear the hyp *)
- then begin debug_print (lazy ("%%%%%%% no clear")); T.id_tac end
- else begin debug_print (lazy ("%%%%%%% clear " ^ (string_of_int (new_nr_of_hyp_still_to_elim)))); (S.clear ~hyp:hyp_name) end)
- ~continuation:(ProofEngineTypes.mk_tactic (elim_clear_tac ~term':(C.Rel new_nr_of_hyp_still_to_elim) ~nr_of_hyp_still_to_elim:new_nr_of_hyp_still_to_elim)))
- status
- )))
- status
- | _ ->
- let new_nr_of_hyp_still_to_elim = nr_of_hyp_still_to_elim - 1 in
- warn (lazy ("fail; hyp=" ^ (string_of_int new_nr_of_hyp_still_to_elim)));
- elim_clear_tac ~term':(C.Rel new_nr_of_hyp_still_to_elim) ~nr_of_hyp_still_to_elim:new_nr_of_hyp_still_to_elim status
- else (* no hyp to elim left in this goal *)
- ProofEngineTypes.apply_tactic T.id_tac status
-
- in
- elim_clear_tac ~term':term ~nr_of_hyp_still_to_elim:1 status
-*)
projects / helm.git / blobdiff