X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=ocaml%2Futil.ml;h=05b952651f4691fd47336241c2f5555b1a1b360f;hb=18e8638888e5e47d755a6c7c4bff37a1a6ec026b;hp=a4af2dd2b01d4532657e5c2249c571a7f989be23;hpb=e4aa4a66dd0a4946607245a0f43eab803f2770c4;p=fireball-separation.git

diff --git a/ocaml/util.ml b/ocaml/util.ml
index a4af2dd..05b9526 100644
--- a/ocaml/util.ml
+++ b/ocaml/util.ml
@@ -14,6 +14,11 @@ let option_map f = function
  | Some x -> Some (f x)
 ;;
 
+let option_get = function
+ | Some x -> x
+ | None -> failwith "option_get: None"
+;;
+
 let rec find_opt f =
  function
     [] -> None
@@ -108,6 +113,7 @@ let var_of_string s =
 let print_name l n =
  if n = -1
   then "*"
+  else if n < 0 then "c" ^ string_of_int n
   else if n >= List.length l then "x" ^ string_of_int (List.length l - n - 1) else List.nth l n
 
 end