let module R = CicReduction in
let module S = CicSubstitution in
let module PT = PrimitiveTactics in
- let _,metasenv,_,_, _ = proof in
+ let _,metasenv,_,_,_, _ = proof in
let _,context,ty = CicUtil.lookup_meta goal metasenv in
let rec find n = function
hd::tl ->
(match hd with
(Some (_, C.Decl t)) when
fst (R.are_convertible context (S.lift n t) ty
- CicUniv.empty_ugraph) -> n
- | (Some (_, C.Def (_,Some ty'))) when
+ CicUniv.oblivion_ugraph) -> n
+ | (Some (_, C.Def (_,ty'))) when
fst (R.are_convertible context (S.lift n ty') ty
- CicUniv.empty_ugraph) -> n
- | (Some (_, C.Def (t,None))) ->
- let ty_t, u = (* TASSI: FIXME *)
- CicTypeChecker.type_of_aux' metasenv context (S.lift n t)
- CicUniv.empty_ugraph in
- let b,_ = R.are_convertible context ty_t ty u in
- if b then n else find (n+1) tl
+ CicUniv.oblivion_ugraph) -> n
| _ -> find (n+1) tl
)
| [] -> raise (PET.Fail (lazy "Assumption: No such assumption"))
in
PET.mk_tactic assumption_tac
;;
-
-(* ANCORA DA DEBUGGARE *)
-
-exception UnableToDetectTheTermThatMustBeGeneralizedYouMustGiveItExplicitly;;
-exception TheSelectedTermsMustLiveInTheGoalContext
-exception AllSelectedTermsMustBeConvertible;;
-exception GeneralizationInHypothesesNotImplementedYet;;
-
-let generalize_tac
- ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[])
- pattern
- =
- let module PET = ProofEngineTypes in
- let generalize_tac mk_fresh_name_callback
- ~pattern:(term,hyps_pat,concl_pat) status
- =
- if hyps_pat <> [] then raise GeneralizationInHypothesesNotImplementedYet;
- let (proof, goal) = status in
- let module C = Cic in
- let module P = PrimitiveTactics in
- let module T = Tacticals in
- let uri,metasenv,pbo,pty, attrs = proof in
- let (_,context,ty) as conjecture = CicUtil.lookup_meta goal metasenv in
- let subst,metasenv,u,selected_hyps,terms_with_context =
- ProofEngineHelpers.select ~metasenv ~ugraph:CicUniv.empty_ugraph
- ~conjecture ~pattern in
- let context = CicMetaSubst.apply_subst_context subst context in
- let metasenv = CicMetaSubst.apply_subst_metasenv subst metasenv in
- let pbo = CicMetaSubst.apply_subst subst pbo in
- let pty = CicMetaSubst.apply_subst subst pty in
- let term =
- match term with
- None -> None
- | Some term ->
- Some (fun context metasenv ugraph ->
- let term, metasenv, ugraph = term context metasenv ugraph in
- CicMetaSubst.apply_subst subst term,
- CicMetaSubst.apply_subst_metasenv subst metasenv,
- ugraph)
- in
- let u,typ,term, metasenv' =
- let context_of_t, (t, metasenv, u) =
- match terms_with_context, term with
- [], None ->
- raise
- UnableToDetectTheTermThatMustBeGeneralizedYouMustGiveItExplicitly
- | [], Some t -> context, t context metasenv u
- | (context_of_t, _)::_, Some t ->
- context_of_t, t context_of_t metasenv u
- | (context_of_t, t)::_, None -> context_of_t, (t, metasenv, u)
- in
- let t,subst,metasenv' =
- try
- CicMetaSubst.delift_rels [] metasenv
- (List.length context_of_t - List.length context) t
- with
- CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
- raise TheSelectedTermsMustLiveInTheGoalContext
- in
- (*CSC: I am not sure about the following two assertions;
- maybe I need to propagate the new subst and metasenv *)
- assert (subst = []);
- assert (metasenv' = metasenv);
- let typ,u = CicTypeChecker.type_of_aux' ~subst metasenv context t u in
- u,typ,t,metasenv
- in
- (* We need to check:
- 1. whether they live in the context of the goal;
- if they do they are also well-typed since they are closed subterms
- of a well-typed term in the well-typed context of the well-typed
- term
- 2. whether they are convertible
- *)
- ignore (
- List.fold_left
- (fun u (context_of_t,t) ->
- (* 1 *)
- let t,subst,metasenv'' =
- try
- CicMetaSubst.delift_rels [] metasenv'
- (List.length context_of_t - List.length context) t
- with
- CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
- raise TheSelectedTermsMustLiveInTheGoalContext in
- (*CSC: I am not sure about the following two assertions;
- maybe I need to propagate the new subst and metasenv *)
- assert (subst = []);
- assert (metasenv'' = metasenv');
- (* 2 *)
- let b,u1 = CicReduction.are_convertible ~subst context term t u in
- if not b then
- raise AllSelectedTermsMustBeConvertible
- else
- u1
- ) u terms_with_context) ;
- let status = (uri,metasenv',pbo,pty, attrs),goal in
- let proof,goals =
- PET.apply_tactic
- (T.thens
- ~start:
- (P.cut_tac
- (C.Prod(
- (mk_fresh_name_callback metasenv context C.Anonymous ~typ:typ),
- typ,
- (ProofEngineReduction.replace_lifting_csc 1
- ~equality:(==)
- ~what:(List.map snd terms_with_context)
- ~with_what:(List.map (function _ -> C.Rel 1) terms_with_context)
- ~where:ty)
- )))
- ~continuations:
- [(P.apply_tac ~term:(C.Appl [C.Rel 1; CicSubstitution.lift 1 term])) ;
- T.id_tac])
- status
- in
- let _,metasenv'',_,_, _ = proof in
- (* CSC: the following is just a bad approximation since a meta
- can be closed and then re-opened! *)
- (proof,
- goals @
- (List.filter
- (fun j -> List.exists (fun (i,_,_) -> i = j) metasenv'')
- (ProofEngineHelpers.compare_metasenvs ~oldmetasenv:metasenv
- ~newmetasenv:metasenv')))
- in
- PET.mk_tactic (generalize_tac mk_fresh_name_callback ~pattern)
-;;
projects / helm.git / blobdiff