*)
exception Meta_not_found of int
+exception Subst_not_found of int
+
let lookup_meta index metasenv =
try
List.find (fun (index', _, _) -> index = index') metasenv
with Not_found -> raise (Meta_not_found index)
+let lookup_subst n subst =
+ try
+ List.assoc n subst
+ with Not_found -> raise (Subst_not_found n)
+
let exists_meta index = List.exists (fun (index', _, _) -> (index = index'))
+(* clean_up_meta take a substitution, a metasenv a meta_inex and a local
+context l and clean up l with respect to the hidden hipothesis in the
+canonical context *)
+
+let clean_up_local_context subst metasenv n l =
+ let cc =
+ (try
+ let (cc,_) = lookup_subst n subst in cc
+ with Subst_not_found _ ->
+ try
+ let (_,cc,_) = lookup_meta n metasenv in cc
+ with Meta_not_found _ -> assert false) in
+ (try
+ List.map2
+ (fun t1 t2 ->
+ match t1,t2 with
+ None , _ -> None
+ | _ , t -> t) cc l
+ with
+ Invalid_argument _ -> assert false)
+
let is_closed =
let module C = Cic in
let rec is_closed k =