X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_kernel%2FnCicTypeChecker.ml;h=6ce59e2631f26d37a6abb8535d0975539a613fdd;hb=345f329e767d0b4a1a87d10e08f92657a95c10ac;hp=5985123733f46b7645bded16f241146f894f1854;hpb=f93b83e4e8af580bc627ea0e8e601f0333c63df2;p=helm.git diff --git a/helm/software/components/ng_kernel/nCicTypeChecker.ml b/helm/software/components/ng_kernel/nCicTypeChecker.ml index 598512373..6ce59e263 100644 --- a/helm/software/components/ng_kernel/nCicTypeChecker.ml +++ b/helm/software/components/ng_kernel/nCicTypeChecker.ml @@ -52,6 +52,7 @@ let get_fixed_args i l = let shift_k e (c,rf,x) = e::c,List.map (fun (k,v) -> k+1,v) rf,x+1;; +(* for debugging only let string_of_recfuns ~subst ~metasenv ~context l = let pp = PP.ppterm ~subst ~metasenv ~context in let safe, rest = List.partition (function (_,Safe) -> true | _ -> false) l in @@ -67,6 +68,7 @@ let string_of_recfuns ~subst ~metasenv ~context l = (function (i,Evil rno)->pp(C.Rel i)^"/"^string_of_int rno | _ -> assert false) dang) ;; +*) let fixed_args bos j n nn = let rec aux k acc = function @@ -87,13 +89,6 @@ let fixed_args bos j n nn = (let rec f = function 0 -> [] | n -> true :: f (n-1) in f j) bos ;; -let rec list_iter_default2 f l1 def l2 = - match l1,l2 with - | [], _ -> () - | a::ta, b::tb -> f a b; list_iter_default2 f ta def tb - | a::ta, [] -> f a def; list_iter_default2 f ta def [] -;; - let rec split_prods ~subst context n te = match (n, R.whd ~subst context te) with | (0, _) -> context,te @@ -102,20 +97,17 @@ let rec split_prods ~subst context n te = | (_, _) -> raise (AssertFailure (lazy "split_prods")) ;; -let debruijn ?(cb=fun _ _ -> ()) uri number_of_types context = +let debruijn uri number_of_types context = let rec aux k t = - let res = - match t with - | C.Meta (i,(s,C.Ctx l)) -> - let l1 = HExtlib.sharing_map (aux (k-s)) l in - if l1 == l then t else C.Meta (i,(s,C.Ctx l1)) - | C.Meta _ -> t - | C.Const (Ref.Ref (_,uri1,(Ref.Fix (no,_) | Ref.CoFix no))) - | C.Const (Ref.Ref (_,uri1,Ref.Ind (_,no))) when NUri.eq uri uri1 -> - C.Rel (k + number_of_types - no) - | t -> U.map (fun _ k -> k+1) k aux t - in - cb t res; res + match t with + | C.Meta (i,(s,C.Ctx l)) -> + let l1 = HExtlib.sharing_map (aux (k-s)) l in + if l1 == l then t else C.Meta (i,(s,C.Ctx l1)) + | C.Meta _ -> t + | C.Const (Ref.Ref (uri1,(Ref.Fix (no,_,_) | Ref.CoFix no))) + | C.Const (Ref.Ref (uri1,Ref.Ind (_,no))) when NUri.eq uri uri1 -> + C.Rel (k + number_of_types - no) + | t -> U.map (fun _ k -> k+1) k aux t in aux (List.length context) ;; @@ -190,8 +182,8 @@ let rec instantiate_parameters params c = let specialize_inductive_type_constrs ~subst context ty_term = match R.whd ~subst context ty_term with - | C.Const (Ref.Ref (_,uri,Ref.Ind (_,i)) as ref) - | C.Appl (C.Const (Ref.Ref (_,uri,Ref.Ind (_,i)) as ref) :: _ ) as ty -> + | C.Const (Ref.Ref (uri,Ref.Ind (_,i)) as ref) + | C.Appl (C.Const (Ref.Ref (uri,Ref.Ind (_,i)) as ref) :: _ ) as ty -> let args = match ty with C.Appl (_::tl) -> tl | _ -> [] in let is_ind, leftno, itl, attrs, i = E.get_checked_indtys ref in let left_args,_ = HExtlib.split_nth leftno args in @@ -242,6 +234,30 @@ let does_not_occur ~subst context n nn t = with DoesOccur -> false ;; +let rec eat_lambdas ~subst ~metasenv context n te = + match (n, R.whd ~subst context te) with + | (0, _) -> (te, context) + | (n, C.Lambda (name,so,ta)) when n > 0 -> + eat_lambdas ~subst ~metasenv ((name,(C.Decl so))::context) (n - 1) ta + | (n, te) -> + raise (AssertFailure (lazy (Printf.sprintf "eat_lambdas (%d, %s)" n + (PP.ppterm ~subst ~metasenv ~context te)))) +;; + +let rec eat_or_subst_lambdas ~subst ~metasenv n te to_be_subst args + (context, recfuns, x as k) += + match n, R.whd ~subst context te, to_be_subst, args with + | (n, C.Lambda (name,so,ta),true::to_be_subst,arg::args) when n > 0 -> + eat_or_subst_lambdas ~subst ~metasenv (n - 1) (S.subst arg ta) + to_be_subst args k + | (n, C.Lambda (name,so,ta),false::to_be_subst,arg::args) when n > 0 -> + eat_or_subst_lambdas ~subst ~metasenv (n - 1) ta to_be_subst args + (shift_k (name,(C.Decl so)) k) + | (_, te, _, _) -> te, k +;; + + (*CSC l'indice x dei tipi induttivi e' t.c. n < x <= nn *) (*CSC questa funzione e' simile alla are_all_occurrences_positive, ma fa *) (*CSC dei controlli leggermente diversi. Viene invocata solamente dalla *) @@ -252,14 +268,14 @@ let rec weakly_positive ~subst context n nn uri te = let dummy = C.Sort (C.Type ~-1) in (*CSC: mettere in cicSubstitution *) let rec subst_inductive_type_with_dummy _ = function - | C.Const (Ref.Ref (_,uri',Ref.Ind (true,0))) when NUri.eq uri' uri -> dummy - | C.Appl ((C.Const (Ref.Ref (_,uri',Ref.Ind (true,0))))::tl) + | C.Const (Ref.Ref (uri',Ref.Ind (true,0))) when NUri.eq uri' uri -> dummy + | C.Appl ((C.Const (Ref.Ref (uri',Ref.Ind (true,0))))::tl) when NUri.eq uri' uri -> dummy | t -> U.map (fun _ x->x) () subst_inductive_type_with_dummy t in match R.whd context te with - | C.Const (Ref.Ref (_,uri',Ref.Ind _)) - | C.Appl ((C.Const (Ref.Ref (_,uri',Ref.Ind _)))::_) + | C.Const (Ref.Ref (uri',Ref.Ind _)) + | C.Appl ((C.Const (Ref.Ref (uri',Ref.Ind _)))::_) when NUri.eq uri' uri -> true | C.Prod (name,source,dest) when does_not_occur ~subst ((name,C.Decl source)::context) 0 1 dest -> @@ -285,7 +301,7 @@ and strictly_positive ~subst context n nn te = strictly_positive ~subst ((name,C.Decl so)::context) (n+1) (nn+1) ta | C.Appl ((C.Rel m)::tl) when m > n && m <= nn -> List.for_all (does_not_occur ~subst context n nn) tl - | C.Appl (C.Const (Ref.Ref (_,uri,Ref.Ind (_,i)) as r)::tl) -> + | C.Appl (C.Const (Ref.Ref (uri,Ref.Ind (_,i)) as r)::tl) -> let _,paramsno,tyl,_,i = E.get_checked_indtys r in let _,name,ity,cl = List.nth tyl i in let ok = List.length tyl = 1 in @@ -419,7 +435,7 @@ let rec typeof ~subst ~metasenv context term = *) eat_prods ~subst ~metasenv context he ty_he args_with_ty | C.Appl _ -> raise (AssertFailure (lazy "Appl of length < 2")) - | C.Match (Ref.Ref (_,_,Ref.Ind (_,tyno)) as r,outtype,term,pl) -> + | C.Match (Ref.Ref (_,Ref.Ind (_,tyno)) as r,outtype,term,pl) -> let outsort = typeof_aux context outtype in let inductive,leftno,itl,_,_ = E.get_checked_indtys r in let constructorsno = @@ -429,8 +445,8 @@ let rec typeof ~subst ~metasenv context term = let ty = R.whd ~subst context (typeof_aux context term) in let r',tl = match ty with - C.Const (Ref.Ref (_,_,Ref.Ind _) as r') -> r',[] - | C.Appl (C.Const (Ref.Ref (_,_,Ref.Ind _) as r') :: tl) -> r',tl + C.Const (Ref.Ref (_,Ref.Ind _) as r') -> r',[] + | C.Appl (C.Const (Ref.Ref (_,Ref.Ind _) as r') :: tl) -> r',tl | _ -> raise (TypeCheckerFailure (lazy (Printf.sprintf @@ -496,8 +512,8 @@ let rec typeof ~subst ~metasenv context term = and type_of_branch ~subst context leftno outty cons tycons liftno = match R.whd ~subst context tycons with - | C.Const (Ref.Ref (_,_,Ref.Ind _)) -> C.Appl [S.lift liftno outty ; cons] - | C.Appl (C.Const (Ref.Ref (_,_,Ref.Ind _))::tl) -> + | C.Const (Ref.Ref (_,Ref.Ind _)) -> C.Appl [S.lift liftno outty ; cons] + | C.Appl (C.Const (Ref.Ref (_,Ref.Ind _))::tl) -> let _,arguments = HExtlib.split_nth leftno tl in C.Appl (S.lift liftno outty::arguments@[cons]) | C.Prod (name,so,de) -> @@ -702,27 +718,6 @@ and check_mutual_inductive_defs uri ~metasenv ~subst is_ind leftno tyl = i + 1) tyl 1) -and eat_lambdas ~subst ~metasenv context n te = - match (n, R.whd ~subst context te) with - | (0, _) -> (te, context) - | (n, C.Lambda (name,so,ta)) when n > 0 -> - eat_lambdas ~subst ~metasenv ((name,(C.Decl so))::context) (n - 1) ta - | (n, te) -> - raise (AssertFailure (lazy (Printf.sprintf "eat_lambdas (%d, %s)" n - (PP.ppterm ~subst ~metasenv ~context te)))) - -and eat_or_subst_lambdas ~subst ~metasenv n te to_be_subst args - (context, recfuns, x as k) -= - match n, R.whd ~subst context te, to_be_subst, args with - | (n, C.Lambda (name,so,ta),true::to_be_subst,arg::args) when n > 0 -> - eat_or_subst_lambdas ~subst ~metasenv (n - 1) (S.subst arg ta) - to_be_subst args k - | (n, C.Lambda (name,so,ta),false::to_be_subst,arg::args) when n > 0 -> - eat_or_subst_lambdas ~subst ~metasenv (n - 1) ta to_be_subst args - (shift_k (name,(C.Decl so)) k) - | (_, te, _, _) -> te, k - and guarded_by_destructors r_uri r_len ~subst ~metasenv context recfuns t = let recursor f k t = U.fold shift_k k (fun k () -> f k) () t in let rec aux (context, recfuns, x as k) t = @@ -754,13 +749,14 @@ and guarded_by_destructors r_uri r_len ~subst ~metasenv context recfuns t = List.iter (aux k) tl | C.Appl ((C.Rel m)::tl) when is_unfolded m recfuns -> let fixed_args = get_fixed_args m recfuns in - list_iter_default2 (fun x b -> if not b then aux k x) tl false fixed_args + HExtlib.list_iter_default2 + (fun x b -> if not b then aux k x) tl false fixed_args | C.Rel m -> (match List.nth context (m-1) with | _,C.Decl _ -> () | _,C.Def (bo,_) -> aux k (S.lift m bo)) | C.Meta _ -> () - | C.Appl (C.Const ((Ref.Ref (_,uri,Ref.Fix (i,recno))) as r)::args) -> + | C.Appl (C.Const ((Ref.Ref (uri,Ref.Fix (i,recno,_))) as r)::args) -> if List.exists (fun t -> try aux k t;false with NotGuarded _ -> true) args then let fl,_,_ = E.get_checked_fixes_or_cofixes r in @@ -773,7 +769,8 @@ and guarded_by_destructors r_uri r_len ~subst ~metasenv context recfuns t = let ctx_len = List.length context in (* we may look for fixed params not only up to j ... *) let fa = fixed_args bos j ctx_len (ctx_len + fl_len) in - list_iter_default2 (fun x b -> if not b then aux k x) args false fa; + HExtlib.list_iter_default2 + (fun x b -> if not b then aux k x) args false fa; let context = context@ctx_tys in let ctx_len = List.length context in let extra_recfuns = @@ -808,7 +805,7 @@ and guarded_by_destructors r_uri r_len ~subst ~metasenv context recfuns t = ) bos in List.iter (fun (bo,k) -> aux k bo) bos_and_ks - | C.Match (Ref.Ref (_,uri,Ref.Ind (true,_)),outtype,term,pl) as t -> + | C.Match (Ref.Ref (uri,Ref.Ind (true,_)),outtype,term,pl) as t -> (match R.whd ~subst context term with | C.Rel m | C.Appl (C.Rel m :: _ ) as t when is_safe m recfuns || m = x -> let ty = typeof ~subst ~metasenv context term in @@ -842,15 +839,15 @@ and guarded_by_constructors ~subst ~metasenv context t indURI indlen nn = | C.Sort _ | C.Implicit _ | C.Prod _ - | C.Const (Ref.Ref (_,_,Ref.Ind _)) + | C.Const (Ref.Ref (_,Ref.Ind _)) | C.LetIn _ -> raise (AssertFailure (lazy "17")) | C.Lambda (name,so,de) -> does_not_occur ~subst context n nn so && aux ((name,C.Decl so)::context) (n + 1) (nn + 1) h de | C.Appl ((C.Rel m)::tl) when m > n && m <= nn -> h && List.for_all (does_not_occur ~subst context n nn) tl - | C.Const (Ref.Ref (_,_,Ref.Con _)) -> true - | C.Appl (C.Const (Ref.Ref (_,uri, Ref.Con (_,j)) as ref) :: tl) as t -> + | C.Const (Ref.Ref (_,Ref.Con _)) -> true + | C.Appl (C.Const (Ref.Ref (uri, Ref.Con (_,j)) as ref) :: tl) as t -> let _, paramsno, _, _, _ = E.get_checked_indtys ref in let ty_t = typeof ~subst ~metasenv context t in let dc_ctx, dcl, start, stop = @@ -880,8 +877,8 @@ and guarded_by_constructors ~subst ~metasenv context t indURI indlen nn = does_not_occur ~subst context n nn out && does_not_occur ~subst context n nn te && List.for_all (aux context n nn h) pl - | C.Const (Ref.Ref (_,u,(Ref.Fix _| Ref.CoFix _)) as ref) - | C.Appl(C.Const (Ref.Ref(_,u,(Ref.Fix _| Ref.CoFix _)) as ref) :: _) as t -> + | C.Const (Ref.Ref (u,(Ref.Fix _| Ref.CoFix _)) as ref) + | C.Appl(C.Const (Ref.Ref(u,(Ref.Fix _| Ref.CoFix _)) as ref) :: _) as t -> let tl = match t with C.Appl (_::tl) -> tl | _ -> [] in let fl,_,_ = E.get_checked_fixes_or_cofixes ref in let len = List.length fl in @@ -926,11 +923,11 @@ and is_really_smaller | C.Appl (he::_) -> is_really_smaller r_uri r_len ~subst ~metasenv k he | C.Rel _ - | C.Const (Ref.Ref (_,_,Ref.Con _)) -> false + | C.Const (Ref.Ref (_,Ref.Con _)) -> false | C.Appl [] - | C.Const (Ref.Ref (_,_,Ref.Fix _)) -> assert false + | C.Const (Ref.Ref (_,Ref.Fix _)) -> assert false | C.Meta _ -> true - | C.Match (Ref.Ref (_,uri,_) as ref,outtype,term,pl) -> + | C.Match (Ref.Ref (uri,_) as ref,outtype,term,pl) -> (match term with | C.Rel m | C.Appl (C.Rel m :: _ ) when is_safe m recfuns || m = x -> (* TODO: add CoInd to references so that this call is useless *) @@ -952,26 +949,26 @@ and is_really_smaller and returns_a_coinductive ~subst context ty = match R.whd ~subst context ty with - | C.Const (Ref.Ref (_,uri,Ref.Ind (false,_)) as ref) - | C.Appl (C.Const (Ref.Ref (_,uri,Ref.Ind (false,_)) as ref)::_) -> + | C.Const (Ref.Ref (uri,Ref.Ind (false,_)) as ref) + | C.Appl (C.Const (Ref.Ref (uri,Ref.Ind (false,_)) as ref)::_) -> let _, _, itl, _, _ = E.get_checked_indtys ref in Some (uri,List.length itl) | C.Prod (n,so,de) -> returns_a_coinductive ~subst ((n,C.Decl so)::context) de | _ -> None -and type_of_constant ((Ref.Ref (_,uri,_)) as ref) = +and type_of_constant ((Ref.Ref (uri,_)) as ref) = match E.get_checked_obj uri, ref with - | (_,_,_,_,C.Inductive (_,_,tl,_)), Ref.Ref (_,_,Ref.Ind (_,i)) -> + | (_,_,_,_,C.Inductive (_,_,tl,_)), Ref.Ref (_,Ref.Ind (_,i)) -> let _,_,arity,_ = List.nth tl i in arity - | (_,_,_,_,C.Inductive (_,_,tl,_)), Ref.Ref (_,_,Ref.Con (i,j)) -> + | (_,_,_,_,C.Inductive (_,_,tl,_)), Ref.Ref (_,Ref.Con (i,j)) -> let _,_,_,cl = List.nth tl i in let _,_,arity = List.nth cl (j-1) in arity - | (_,_,_,_,C.Fixpoint (_,fl,_)), Ref.Ref (_,_,(Ref.Fix (i,_)|Ref.CoFix i)) -> + | (_,_,_,_,C.Fixpoint (_,fl,_)), Ref.Ref (_,(Ref.Fix (i,_,_)|Ref.CoFix i)) -> let _,_,_,arity,_ = List.nth fl i in arity - | (_,_,_,_,C.Constant (_,_,_,ty,_)), Ref.Ref (_,_,(Ref.Def |Ref.Decl)) -> ty + | (_,_,_,_,C.Constant (_,_,_,ty,_)), Ref.Ref (_,(Ref.Def _|Ref.Decl)) -> ty | _ -> raise (AssertFailure (lazy "type_of_constant: environment/reference")) ;; @@ -980,11 +977,19 @@ let typecheck_context ~metasenv ~subst context = (List.fold_right (fun d context -> begin - match snd d with - C.Decl t -> ignore (typeof ~metasenv ~subst:[] context t) - | C.Def (te,ty) -> - ignore (typeof ~metasenv ~subst:[] context te); + match d with + _,C.Decl t -> ignore (typeof ~metasenv ~subst:[] context t) + | name,C.Def (te,ty) -> ignore (typeof ~metasenv ~subst:[] context ty); + let ty' = typeof ~metasenv ~subst:[] context te in + if not (R.are_convertible ~subst context ty' ty) then + raise (AssertFailure (lazy (Printf.sprintf ( + "the type of the definiens for %s in the context is not "^^ + "convertible with the declared one.\n"^^ + "inferred type:\n%s\nexpected type:\n%s") + name + (PP.ppterm ~subst ~metasenv ~context ty') + (PP.ppterm ~subst ~metasenv ~context ty)))) end; d::context ) context []) @@ -1016,14 +1021,14 @@ let typecheck_subst ~metasenv subst = typecheck_context ~metasenv ~subst context; ignore (typeof ~metasenv ~subst context ty); let ty' = typeof ~metasenv ~subst context bo in - if not (R.are_convertible ~subst [] ty' ty) then + if not (R.are_convertible ~subst context ty' ty) then raise (AssertFailure (lazy (Printf.sprintf ( "the type of the definiens for %d in the substitution is not "^^ "convertible with the declared one.\n"^^ "inferred type:\n%s\nexpected type:\n%s") i - (PP.ppterm ~subst ~metasenv ~context:[] ty') - (PP.ppterm ~subst ~metasenv ~context:[] ty)))); + (PP.ppterm ~subst ~metasenv ~context ty') + (PP.ppterm ~subst ~metasenv ~context ty)))); subst @ [conj] ) [] subst) ;; @@ -1072,8 +1077,8 @@ let typecheck_obj (uri,height,metasenv,subst,kind) = match List.hd context with _,C.Decl t -> t | _ -> assert false in match R.whd ~subst (List.tl context) he with - | C.Const (Ref.Ref (_,uri,Ref.Ind _) as ref) - | C.Appl (C.Const (Ref.Ref (_,uri,Ref.Ind _) as ref) :: _) -> + | C.Const (Ref.Ref (uri,Ref.Ind _) as ref) + | C.Appl (C.Const (Ref.Ref (uri,Ref.Ind _) as ref) :: _) -> let _,_,itl,_,_ = E.get_checked_indtys ref in uri, List.length itl | _ -> assert false