exception ListTooShort;;
exception RelToHiddenHypothesis;;
+(*CSC: must alfa-conversion be considered or not? *)
+
let xxx_type_of_aux' m c t =
try
Some (fst (CicTypeChecker.type_of_aux' m c t CicUniv.empty_ugraph))
C.CoFix (i,fl')
;;
-(* syntactic_equality up to the *)
-(* distinction between fake dependent products *)
-(* and non-dependent products, alfa-conversion *)
-(*CSC: must alfa-conversion be considered or not? *)
-let syntactic_equality t t' =
- let module C = Cic in
- let rec syntactic_equality t t' =
- if t = t' then true
- else
- match t, t' with
- C.Var (uri,exp_named_subst), C.Var (uri',exp_named_subst') ->
- UriManager.eq uri uri' &&
- syntactic_equality_exp_named_subst exp_named_subst exp_named_subst'
- | C.Cast (te,ty), C.Cast (te',ty') ->
- syntactic_equality te te' &&
- syntactic_equality ty ty'
- | C.Prod (_,s,t), C.Prod (_,s',t') ->
- syntactic_equality s s' &&
- syntactic_equality t t'
- | C.Lambda (_,s,t), C.Lambda (_,s',t') ->
- syntactic_equality s s' &&
- syntactic_equality t t'
- | C.LetIn (_,s,t), C.LetIn(_,s',t') ->
- syntactic_equality s s' &&
- syntactic_equality t t'
- | C.Appl l, C.Appl l' ->
- List.fold_left2 (fun b t1 t2 -> b && syntactic_equality t1 t2) true l l'
- | C.Const (uri,exp_named_subst), C.Const (uri',exp_named_subst') ->
- UriManager.eq uri uri' &&
- syntactic_equality_exp_named_subst exp_named_subst exp_named_subst'
- | C.MutInd (uri,i,exp_named_subst), C.MutInd (uri',i',exp_named_subst') ->
- UriManager.eq uri uri' && i = i' &&
- syntactic_equality_exp_named_subst exp_named_subst exp_named_subst'
- | C.MutConstruct (uri,i,j,exp_named_subst),
- C.MutConstruct (uri',i',j',exp_named_subst') ->
- UriManager.eq uri uri' && i = i' && j = j' &&
- syntactic_equality_exp_named_subst exp_named_subst exp_named_subst'
- | C.MutCase (sp,i,outt,t,pl), C.MutCase (sp',i',outt',t',pl') ->
- UriManager.eq sp sp' && i = i' &&
- syntactic_equality outt outt' &&
- syntactic_equality t t' &&
- List.fold_left2
- (fun b t1 t2 -> b && syntactic_equality t1 t2) true pl pl'
- | C.Fix (i,fl), C.Fix (i',fl') ->
- i = i' &&
- List.fold_left2
- (fun b (_,i,ty,bo) (_,i',ty',bo') ->
- b && i = i' &&
- syntactic_equality ty ty' &&
- syntactic_equality bo bo') true fl fl'
- | C.CoFix (i,fl), C.CoFix (i',fl') ->
- i = i' &&
- List.fold_left2
- (fun b (_,ty,bo) (_,ty',bo') ->
- b &&
- syntactic_equality ty ty' &&
- syntactic_equality bo bo') true fl fl'
- | _, _ -> false (* we already know that t != t' *)
- and syntactic_equality_exp_named_subst exp_named_subst1 exp_named_subst2 =
- List.fold_left2
- (fun b (_,t1) (_,t2) -> b && syntactic_equality t1 t2) true
- exp_named_subst1 exp_named_subst2
- in
- try
- syntactic_equality t t'
- with
- _ -> false
-;;
-
let rec split l n =
match (l,n) with
(l,0) -> ([], l)
None ->
(* No expected type *)
{synthesized = synthesized' ; expected = None}, synthesized
- | Some ty when syntactic_equality synthesized' ty ->
+ | Some ty when CicUtil.alpha_equivalence synthesized' ty ->
(* The expected type is synthactically equal to *)
(* the synthesized type. Let's forget it. *)
{synthesized = synthesized' ; expected = None}, synthesized