open Printf
-(* (* PROFILING *)
-let apply_subst_counter = ref 0
+(* PROFILING *)
+(*
+let deref_counter = ref 0
let apply_subst_context_counter = ref 0
let apply_subst_metasenv_counter = ref 0
let lift_counter = ref 0
((float !metasenv_length) /. (float !apply_subst_metasenv_counter))
!context_length
((float !context_length) /. (float !apply_subst_context_counter))
- )
-*)
+ )*)
+
+
exception MetaSubstFailure of string
exception Uncertain of string
exception AssertFailure of string
-exception SubstNotFound of int
let debug_print = prerr_endline
type substitution = (int * (Cic.context * Cic.term)) list
-let lookup_subst n subst =
- try
- List.assoc n subst
- with Not_found -> raise (SubstNotFound n)
+(*
+let rec deref subst =
+ let third _,_,a = a in
+ function
+ Cic.Meta(n,l) as t ->
+ (try
+ deref subst
+ (CicSubstitution.lift_meta
+ l (third (CicUtil.lookup_subst n subst)))
+ with
+ CicUtil.Subst_not_found _ -> t)
+ | t -> t
+;;
+*)
+
+let lookup_subst = CicUtil.lookup_subst
+;;
+
(* clean_up_meta take a metasenv and a term and make every local context
of each occurrence of a metavariable consistent with its canonical context,
with respect to the hidden hipothesis *)
+
(*
let clean_up_meta subst metasenv t =
let module C = Cic in
let cc =
(try
let (cc,_) = lookup_subst n subst in cc
- with SubstNotFound _ ->
+ with CicUtil.Subst_not_found _ ->
try
let (_,cc,_) = CicUtil.lookup_meta n metasenv in cc
with CicUtil.Meta_not_found _ -> assert false) in
C.Var (uri, exp_named_subst')
| C.Meta (i, l) ->
(try
- let (context, t) = lookup_subst i subst in
+ let (_, t,_) = lookup_subst i subst in
um_aux (S.lift_meta l t)
- with SubstNotFound _ -> (* unconstrained variable, i.e. free in subst*)
+ with CicUtil.Subst_not_found _ ->
+ (* unconstrained variable, i.e. free in subst*)
let l' =
List.map (function None -> None | Some t -> Some (um_aux t)) l
in
let ppsubst_unfolded subst =
String.concat "\n"
(List.map
- (fun (idx, (c, t)) ->
+ (fun (idx, (c, t,_)) ->
let context,name_context = ppcontext' ~sep:"; " subst c in
sprintf "%s |- ?%d:= %s" context idx
(ppterm_in_context subst t name_context))
let ppsubst subst =
String.concat "\n"
(List.map
- (fun (idx, (c, t)) ->
+ (fun (idx, (c, t, _)) ->
let context,name_context = ppcontext' ~sep:"; " [] c in
sprintf "%s |- ?%d:= %s" context idx
(ppterm_in_context [] t name_context))
(fun (i, _, _) -> not (List.mem_assoc i subst))
metasenv))
-(* From now on we recreate a kernel abstraction where substitutions are part of
- * the calculus *)
-
-let lift subst n term =
-(* incr subst_counter; *)
- let term = apply_subst subst term in
- try
- CicSubstitution.lift n term
- with e ->
- raise (MetaSubstFailure ("Lift failure: " ^ Printexc.to_string e))
-
-let subst subst t1 t2 =
-(* incr subst_counter; *)
- let t1 = apply_subst subst t1 in
- let t2 = apply_subst subst t2 in
- try
- CicSubstitution.subst t1 t2
- with e ->
- raise (MetaSubstFailure ("Subst failure: " ^ Printexc.to_string e))
-
-let whd subst context term =
-(* incr whd_counter; *)
- let term = apply_subst subst term in
- let context = apply_subst_context subst context in
- try
- CicReduction.whd context term
- with e ->
- raise (MetaSubstFailure ("Weak head reduction failure: " ^
- Printexc.to_string e))
-
-let are_convertible subst context t1 t2 =
-(* incr are_convertible_counter; *)
- let context = apply_subst_context subst context in
- let t1 = apply_subst subst t1 in
- let t2 = apply_subst subst t2 in
- CicReduction.are_convertible context t1 t2
-
let tempi_type_of_aux_subst = ref 0.0;;
let tempi_subst = ref 0.0;;
let tempi_type_of_aux = ref 0.0;;
- (* assumption: metasenv is already instantiated wrt subst *)
-let type_of_aux' metasenv subst context term =
- let time1 = Unix.gettimeofday () in
-(* let term = clean_up_meta subst metasenv term in *)
- let term = apply_subst subst term in
- let context = apply_subst_context subst context in
-(* let metasenv = apply_subst_metasenv subst metasenv in *)
- let time2 = Unix.gettimeofday () in
- let res =
- try
- CicTypeChecker.type_of_aux' metasenv context term
- with CicTypeChecker.TypeCheckerFailure msg ->
- raise (MetaSubstFailure ("Type checker failure: " ^ msg))
- in
- let time3 = Unix.gettimeofday () in
- tempi_type_of_aux_subst := !tempi_type_of_aux_subst +. time3 -. time1 ;
- tempi_subst := !tempi_subst +. time2 -. time1 ;
- tempi_type_of_aux := !tempi_type_of_aux +. time3 -. time2 ;
- res
-
(**** DELIFT ****)
(* the delift function takes in input a metavariable index, an ordered list of
* optional terms [t1,...,tn] and a term t, and substitutes every tk = Some
| [] -> [], to_be_restricted, []
| hd::tl ->
let more_to_be_restricted,restricted,tl' =
- erase (i+1) to_be_restricted n tl
+ erase (i+1) to_be_restricted n tl
in
let restrict_me = List.mem i restricted in
if restrict_me then
- more_to_be_restricted, restricted, None:: tl'
+ more_to_be_restricted, restricted, None:: tl'
else
(try
let more_to_be_restricted', hd' =
raise (MetaSubstFailure (sprintf
"Cannot restrict the context of the metavariable ?%d over the hypotheses %s since metavariable's type depends on at least one of them"
n (names_of_context_indexes context to_be_restricted))))
- metasenv ([], [])
+ metasenv ([], [])
in
let (more_to_be_restricted', subst) = (* restrict subst *)
List.fold_right
- (fun (n, (context, term)) (more, subst') ->
+ (* TODO: cambiare dopo l'aggiunta del ty *)
+ (fun (n, (context, term,ty)) (more, subst') ->
let to_be_restricted =
List.map snd (List.filter (fun (m, _) -> m = n) to_be_restricted)
in
let more_to_be_restricted', term' =
force_does_not_occur subst restricted term
in
- let subst' = (n, (context', term')) :: subst' in
- let more = more @ more_to_be_restricted @ more_to_be_restricted' in
+ let more_to_be_restricted'', ty' =
+ force_does_not_occur subst restricted ty in
+ let subst' = (n, (context', term',ty')) :: subst' in
+ let more =
+ more @ more_to_be_restricted
+ @ more_to_be_restricted'@more_to_be_restricted'' in
(more, subst')
with Occur ->
let error_msg = sprintf
"Cannot restrict the context of the metavariable ?%d over the hypotheses %s since ?%d is already instantiated with %s and at least one of the hypotheses occurs in the substituted term"
n (names_of_context_indexes context to_be_restricted) n
(ppterm subst term)
- in
+ in
(* DEBUG
prerr_endline error_msg;
prerr_endline ("metasenv = \n" ^ (ppmetasenv metasenv subst));
prerr_endline ("subst = \n" ^ (ppsubst subst));
prerr_endline ("context = \n" ^ (ppcontext subst context)); *)
raise (MetaSubstFailure error_msg)))
- subst ([], [])
+ subst ([], [])
in
match more_to_be_restricted @ more_to_be_restricted' with
| [] -> (metasenv, subst)
let delift n subst context metasenv l t =
(* INVARIANT: we suppose that t is not another occurrence of Meta(n,_),
otherwise the occur check does not make sense *)
+
(*
prerr_endline ("sto deliftando il termine " ^ (CicPp.ppterm t) ^ " rispetto
al contesto locale " ^ (CicPp.ppterm (Cic.Meta(0,l))));
"Cannot unify the metavariable ?%d with a term that has as subterm %s in which the same metavariable occurs (occur check)"
i (ppterm subst t)))
else
- begin
+ begin
(* I do not consider the term associated to ?i in subst since *)
(* in this way I can restrict if something goes wrong. *)
- let rec deliftl j =
- function
- [] -> []
- | None::tl -> None::(deliftl (j+1) tl)
- | (Some t)::tl ->
- let l1' = (deliftl (j+1) tl) in
- try
- Some (deliftaux k t)::l1'
- with
- NotInTheList
- | MetaSubstFailure _ ->
- to_be_restricted := (i,j)::!to_be_restricted ; None::l1'
- in
+ let rec deliftl j =
+ function
+ [] -> []
+ | None::tl -> None::(deliftl (j+1) tl)
+ | (Some t)::tl ->
+ let l1' = (deliftl (j+1) tl) in
+ try
+ Some (deliftaux k t)::l1'
+ with
+ NotInTheList
+ | MetaSubstFailure _ ->
+ to_be_restricted :=
+ (i,j)::!to_be_restricted ; None::l1'
+ in
let l' = deliftl 1 l1 in
C.Meta(i,l')
- end
+ end
| C.Sort _ as t -> t
| C.Implicit _ as t -> t
| C.Cast (te,ty) -> C.Cast (deliftaux k te, deliftaux k ty)
projects / helm.git / blobdiff