* http://cs.unibo.it/helm/.
*)
-exception ReferenceToVariable;;
-exception RferenceToCurrentProof;;
-exception ReferenceToInductiveDefinition;;
+exception ReferenceToNonVariable;;
+
+let prerr_endline _ = ();;
(*
let rec fix_lambdas_wrt_type ty te =
let rec aux n ty tl res =
if n = 0 then
(match tl with
- [] -> C.Appl res
+ [] ->
+ (match res with
+ [] -> assert false
+ | [res] -> res
+ | _ -> C.Appl res)
| _ ->
match res with
[] -> assert false
aux expected_arity ty tl [hd]
;;
-let eta_fix metasenv t =
- let rec eta_fix' t =
-(* prerr_endline ("entering aux with: term=" ^ CicPp.ppterm t);
+let eta_fix metasenv context t =
+ let rec eta_fix' context t =
+ (* prerr_endline ("entering aux with: term=" ^ CicPp.ppterm t);
flush stderr ; *)
let module C = Cic in
+ let module S = CicSubstitution in
match t with
C.Rel n -> C.Rel n
| C.Var (uri,exp_named_subst) ->
- let exp_named_subst' =
- List.map
- (function i,t -> i, (eta_fix' t)) exp_named_subst
- in
- C.Var (uri,exp_named_subst')
+ let exp_named_subst' = fix_exp_named_subst context exp_named_subst in
+ C.Var (uri,exp_named_subst')
| C.Meta (n,l) ->
- let (_,canonical_context,_) =
- List.find (function (m,_,_) -> n = m) metasenv
- in
- let l' =
+ let (_,canonical_context,_) = CicUtil.lookup_meta n metasenv in
+ let l' =
List.map2
(fun ct t ->
match (ct, t) with
None, _ -> None
- | _, Some t -> Some (eta_fix' t)
+ | _, Some t -> Some (eta_fix' context t)
| Some _, None -> assert false (* due to typing rules *))
canonical_context l
in
C.Meta (n,l')
| C.Sort s -> C.Sort s
- | C.Implicit -> C.Implicit
- | C.Cast (v,t) -> C.Cast (eta_fix' v, eta_fix' t)
- | C.Prod (n,s,t) -> C.Prod (n, eta_fix' s, eta_fix' t)
- | C.Lambda (n,s,t) -> C.Lambda (n, eta_fix' s, eta_fix' t)
- | C.LetIn (n,s,t) -> C.LetIn (n, eta_fix' s, eta_fix' t)
+ | C.Implicit _ as t -> t
+ | C.Cast (v,t) -> C.Cast (eta_fix' context v, eta_fix' context t)
+ | C.Prod (n,s,t) ->
+ C.Prod
+ (n, eta_fix' context s, eta_fix' ((Some (n,(C.Decl s)))::context) t)
+ | C.Lambda (n,s,t) ->
+ C.Lambda
+ (n, eta_fix' context s, eta_fix' ((Some (n,(C.Decl s)))::context) t)
+ | C.LetIn (n,s,t) ->
+ C.LetIn
+ (n,eta_fix' context s,eta_fix' ((Some (n,(C.Def (s,None))))::context) t)
| C.Appl l as appl ->
- let l' = List.map eta_fix' l
+ let l' = List.map (eta_fix' context) l
in
(match l' with
+ [] -> assert false
+ | he::tl ->
+ let ty,_ =
+ CicTypeChecker.type_of_aux' metasenv context he
+ CicUniv.empty_ugraph
+ in
+ fix_according_to_type ty he tl
+(*
C.Const(uri,exp_named_subst)::l'' ->
let constant_type =
(match CicEnvironment.get_obj uri with
C.Constant (_,_,ty,_) -> ty
| C.Variable _ -> raise ReferenceToVariable
- | C.CurrentProof (_,_,_,_,params) -> raise RferenceToCurrentProof
+ | C.CurrentProof (_,_,_,_,params) -> raise ReferenceToCurrentProof
| C.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
- )
- in
- let result = fix_according_to_type constant_type (C.Const(uri,exp_named_subst)) l'' in
- if not (CicReduction.are_convertible [] appl result) then
- (prerr_endline ("prima :" ^(CicPp.ppterm appl));
- prerr_endline ("dopo :" ^(CicPp.ppterm result)));
- result
- | _ -> C.Appl l' )
+ ) in
+ fix_according_to_type
+ constant_type (C.Const(uri,exp_named_subst)) l''
+ | _ -> C.Appl l' *))
| C.Const (uri,exp_named_subst) ->
- let exp_named_subst' =
- List.map
- (function i,t -> i, (eta_fix' t)) exp_named_subst
- in
- C.Const (uri,exp_named_subst')
+ let exp_named_subst' = fix_exp_named_subst context exp_named_subst in
+ C.Const (uri,exp_named_subst')
| C.MutInd (uri,tyno,exp_named_subst) ->
- let exp_named_subst' =
- List.map
- (function i,t -> i, (eta_fix' t)) exp_named_subst
- in
+ let exp_named_subst' = fix_exp_named_subst context exp_named_subst in
C.MutInd (uri, tyno, exp_named_subst')
| C.MutConstruct (uri,tyno,consno,exp_named_subst) ->
- let exp_named_subst' =
- List.map
- (function i,t -> i, (eta_fix' t)) exp_named_subst
- in
+ let exp_named_subst' = fix_exp_named_subst context exp_named_subst in
C.MutConstruct (uri, tyno, consno, exp_named_subst')
- | C.MutCase (uri, tyno, outty, term, patterns) ->
- C.MutCase (uri, tyno, eta_fix' outty,
- eta_fix' term, List.map eta_fix' patterns)
+ | C.MutCase (uri, tyno, outty, term, patterns) as prima ->
+ let outty' = eta_fix' context outty in
+ let term' = eta_fix' context term in
+ let patterns' = List.map (eta_fix' context) patterns in
+ let inductive_types,noparams =
+ let o,_ = CicEnvironment.get_obj CicUniv.empty_ugraph uri in
+ (match o with
+ Cic.Constant _ -> assert false
+ | Cic.Variable _ -> assert false
+ | Cic.CurrentProof _ -> assert false
+ | Cic.InductiveDefinition (l,_,n,_) -> l,n
+ ) in
+ let (_,_,_,constructors) = List.nth inductive_types tyno in
+ let constructor_types =
+ let rec clean_up t =
+ function
+ [] -> t
+ | a::tl ->
+ (match t with
+ Cic.Prod (_,_,t') -> clean_up (S.subst a t') tl
+ | _ -> assert false) in
+ if noparams = 0 then
+ List.map (fun (_,t) -> t) constructors
+ else
+ let term_type,_ =
+ CicTypeChecker.type_of_aux' metasenv context term
+ CicUniv.empty_ugraph
+ in
+ (match term_type with
+ C.Appl (hd::params) ->
+ let rec first_n n l =
+ if n = 0 then []
+ else
+ (match l with
+ a::tl -> a::(first_n (n-1) tl)
+ | _ -> assert false) in
+ List.map
+ (fun (_,t) ->
+ clean_up t (first_n noparams params)) constructors
+ | _ -> prerr_endline ("QUA"); assert false) in
+ let patterns2 =
+ List.map2 fix_lambdas_wrt_type
+ constructor_types patterns in
+ C.MutCase (uri, tyno, outty',term',patterns2)
| C.Fix (funno, funs) ->
+ let fun_types =
+ List.map (fun (n,_,ty,_) -> Some (C.Name n,(Cic.Decl ty))) funs in
C.Fix (funno,
List.map
(fun (name, no, ty, bo) ->
- (name, no, eta_fix' ty, eta_fix' bo)) funs)
+ (name, no, eta_fix' context ty, eta_fix' (fun_types@context) bo))
+ funs)
| C.CoFix (funno, funs) ->
+ let fun_types =
+ List.map (fun (n,ty,_) -> Some (C.Name n,(Cic.Decl ty))) funs in
C.CoFix (funno,
List.map
(fun (name, ty, bo) ->
- (name, eta_fix' ty, eta_fix' bo)) funs)
- in
- eta_fix' t
+ (name, eta_fix' context ty, eta_fix' (fun_types@context) bo)) funs)
+ and fix_exp_named_subst context exp_named_subst =
+ List.rev
+ (List.fold_left
+ (fun newsubst (uri,t) ->
+ let t' = eta_fix' context t in
+ let ty =
+ let o,_ = CicEnvironment.get_obj CicUniv.empty_ugraph uri in
+ match o with
+ Cic.Variable (_,_,ty,_,_) ->
+ CicSubstitution.subst_vars newsubst ty
+ | _ -> raise ReferenceToNonVariable
+ in
+ let t'' = fix_according_to_type ty t' [] in
+ (uri,t'')::newsubst
+ ) [] exp_named_subst)
+ in
+ eta_fix' context t
;;
-
-
-
projects / helm.git / blobdiff