exception Uncertain of string;;
exception AssertFailure of string;;
-let debug_print = prerr_endline
+let debug_print = fun _ -> ()
let fo_unif_subst subst context metasenv t1 t2 ugraph =
try
| (_,_) -> raise (AssertFailure "split: list too short")
;;
-let look_for_coercion src tgt =
- None
- (*
- if (src = (CicUtil.term_of_uri "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1)")) &&
- (tgt = (CicUtil.term_of_uri "cic:/Coq/Reals/Rdefinitions/R.con"))
- then
- begin
- prerr_endline "TROVATA coercion";
- Some (CicUtil.term_of_uri "cic:/Coq/Reals/Raxioms/INR.con")
- end
- else
- begin
- prerr_endline (sprintf "NON TROVATA la coercion %s %s" (CicPp.ppterm src)
- (CicPp.ppterm tgt));
- None
- end
- *)
-;;
-
-
let rec type_of_constant uri ugraph =
let module C = Cic in
let module R = CicReduction in
(try
let subst''',metasenv''',ugraph3 =
fo_unif_subst subst'' context metasenv''
- inferredty ty' ugraph2
+ inferredty ty ugraph2
in
C.Cast (te',ty'),ty',subst''',metasenv''',ugraph3
with
fo_unif_subst subst context metasenv
expected_type' actual_type ugraph2
in
+ let rec instantiate_prod t =
+ function
+ [] -> t
+ | he::tl ->
+ match CicReduction.whd ~subst context t with
+ C.Prod (_,_,t') ->
+ instantiate_prod (CicSubstitution.subst he t') tl
+ | _ -> assert false
+ in
+ let arity_instantiated_with_left_args =
+ instantiate_prod arity left_args in
(* TODO: check if the sort elimination
* is allowed: [(I q1 ... qr)|B] *)
let (pl',_,outtypeinstances,subst,metasenv,ugraph4) =
(match outtype with
| C.Meta (n,l) ->
- (let candidate,ugraph5 =
+ (let candidate,ugraph5,metasenv,subst =
+ let exp_name_subst, metasenv =
+ let o,_ =
+ CicEnvironment.get_obj CicUniv.empty_ugraph uri
+ in
+ let uris = CicUtil.params_of_obj o in
+ List.fold_right (
+ fun uri (acc,metasenv) ->
+ let metasenv',new_meta =
+ CicMkImplicit.mk_implicit metasenv subst context
+ in
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable
+ context
+ in
+ (uri, Cic.Meta(new_meta,irl))::acc, metasenv'
+ ) uris ([],metasenv)
+ in
+ let ty =
+ match left_args,right_args with
+ [],[] -> Cic.MutInd(uri, i, exp_name_subst)
+ | _,_ ->
+ let rec mk_right_args =
+ function
+ 0 -> []
+ | n -> (Cic.Rel n)::(mk_right_args (n - 1))
+ in
+ let right_args_no = List.length right_args in
+ let lifted_left_args =
+ List.map (CicSubstitution.lift right_args_no) left_args
+ in
+ Cic.Appl (Cic.MutInd(uri,i,exp_name_subst)::
+ (lifted_left_args @ mk_right_args right_args_no))
+ in
+ let fresh_name =
+ FreshNamesGenerator.mk_fresh_name ~subst metasenv
+ context Cic.Anonymous ~typ:ty
+ in
match outtypeinstances with
- | [] -> raise (Uncertain "Inference of annotation for empty inductive types not implemented")
+ | [] ->
+ let extended_context =
+ let rec add_right_args =
+ function
+ Cic.Prod (name,ty,t) ->
+ Some (name,Cic.Decl ty)::(add_right_args t)
+ | _ -> []
+ in
+ (Some (fresh_name,Cic.Decl ty))::
+ (List.rev
+ (add_right_args arity_instantiated_with_left_args))@
+ context
+ in
+ let metasenv,new_meta =
+ CicMkImplicit.mk_implicit metasenv subst extended_context
+ in
+ let irl =
+ CicMkImplicit.identity_relocation_list_for_metavariable
+ extended_context
+ in
+ let rec add_lambdas b =
+ function
+ Cic.Prod (name,ty,t) ->
+ Cic.Lambda (name,ty,(add_lambdas b t))
+ | _ -> Cic.Lambda (fresh_name, ty, b)
+ in
+ let candidate =
+ add_lambdas (Cic.Meta (new_meta,irl))
+ arity_instantiated_with_left_args
+ in
+ (Some candidate),ugraph4,metasenv,subst
| (constructor_args_no,_,instance,_)::tl ->
try
let instance' =
- CicSubstitution.delift constructor_args_no
+ CicMetaSubst.delift_rels constructor_args_no
(CicMetaSubst.apply_subst subst instance)
in
+ let candidate,ugraph,metasenv,subst =
List.fold_left (
- fun (candidate_oty,ugraph)
+ fun (candidate_oty,ugraph,metasenv,subst)
(constructor_args_no,_,instance,_) ->
match candidate_oty with
- | None -> None,ugraph
+ | None -> None,ugraph,metasenv,subst
| Some ty ->
try
let instance' =
- CicSubstitution.delift
+ CicMetaSubst.delift_rels
constructor_args_no
(CicMetaSubst.apply_subst subst instance)
in
- let b,ugraph1 =
- CicReduction.are_convertible context
- instance' ty ugraph
+ let subst,metasenv,ugraph =
+ fo_unif_subst subst context metasenv
+ instance' ty ugraph
in
- if b then
- candidate_oty,ugraph1
- else
- None,ugraph
- with Failure s -> None,ugraph
- ) (Some instance',ugraph4) tl
- with Failure s ->
- None,ugraph4
+ candidate_oty,ugraph,metasenv,subst
+ with
+ CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable
+ | CicUnification.UnificationFailure _
+ | CicUnification.Uncertain _ ->
+ None,ugraph,metasenv,subst
+ ) (Some instance',ugraph4,metasenv,subst) tl
+ in
+ match candidate with
+ | None -> None, ugraph,metasenv,subst
+ | Some t ->
+ let rec add_lambdas n b =
+ function
+ Cic.Prod (name,ty,t) ->
+ Cic.Lambda (name,ty,(add_lambdas (n + 1) b t))
+ | _ ->
+ Cic.Lambda (fresh_name, ty,
+ CicSubstitution.lift (n + 1) t)
+ in
+ Some
+ (add_lambdas 0 t arity_instantiated_with_left_args),
+ ugraph,metasenv,subst
+ with CicMetaSubst.DeliftingARelWouldCaptureAFreeVariable ->
+ None,ugraph4,metasenv,subst
in
match candidate with
| None -> raise (Uncertain "can't solve an higher order unification problem")
| Some candidate ->
- let s,m,u =
+ let subst,metasenv,ugraph =
fo_unif_subst subst context metasenv
candidate outtype ugraph5
in
- C.MutCase (uri, i, outtype, term', pl'),candidate,s,m,u)
+ C.MutCase (uri, i, outtype, term', pl'),
+ (Cic.Appl (outtype::right_args@[term'])),
+ subst,metasenv,ugraph)
| _ -> (* easy case *)
let _,_, subst, metasenv,ugraph5 =
type_of_aux subst metasenv context
try
fo_unif_subst subst context metasenv hetype hetype' ugraph
with exn ->
- prerr_endline (Printf.sprintf "hetype=%s\nhetype'=%s\nmetasenv=%s\nsubst=%s"
+ debug_print (Printf.sprintf "hetype=%s\nhetype'=%s\nmetasenv=%s\nsubst=%s"
(CicPp.ppterm hetype)
(CicPp.ppterm hetype')
(CicMetaSubst.ppmetasenv metasenv [])
hete,subst,metasenv,ugraph1
with exn ->
(* we search a coercion from hety to s *)
- let coer = look_for_coercion
+ let coer = CoercGraph.look_for_coercion
(CicMetaSubst.apply_subst subst hety)
(CicMetaSubst.apply_subst subst s)
in
(cleaned_t,cleaned_ty,cleaned_metasenv,ugraph1)
;;
+let type_of_aux' metasenv context term ugraph =
+ try
+ type_of_aux' metasenv context term ugraph
+ with
+ CicUniv.UniverseInconsistency msg -> raise (RefineFailure msg)
+
+
(* DEBUGGING ONLY
let type_of_aux' metasenv context term =
try
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