- we added a parser for lambda-delta textual syntax (file extension .hln)

[helm.git] / helm / software / lambda-delta / complete_rg / crg.ml

diff --git a/helm/software/lambda-delta/complete_rg/crg.ml b/helm/software/lambda-delta/complete_rg/crg.ml
index fa76c6164ab02c1605eae0282d210d8dab9a5f71..0b0853386ebb41c604d919d5f4feb76f3a4328f3 100644 (file)
--- a/helm/software/lambda-delta/complete_rg/crg.ml
+++ b/helm/software/lambda-delta/complete_rg/crg.ml
@@ -46,7 +46,7 @@ let push_bind f lenv a b = f (EBind (lenv, a, b))
 
 let push_proj f lenv a e = f (EProj (lenv, a, e))
 
-let push2 err f lenv attr ?t = match lenv, t with
+let push2 err f lenv attr ?t () = match lenv, t with
    | EBind (e, a, Abst ws), Some t -> f (EBind (e, (attr :: a), Abst (t :: ws)))
    | EBind (e, a, Abbr vs), Some t -> f (EBind (e, (attr :: a), Abbr (t :: vs)))
    | EBind (e, a, Void n), None    -> f (EBind (e, (attr :: a), Void (succ n)))
@@ -55,20 +55,23 @@ let push2 err f lenv attr ?t = match lenv, t with
 (* this id not tail recursive *)
 let resolve_lref err f id lenv =
    let rec aux f i k = function
-     | ESort            -> err ()
-     | EBind (tl, a, _) ->
+     | ESort                  -> err ()
+     | EBind (tl, _, Abst [])
+     | EBind (tl, _, Abbr [])
+     | EBind (tl, _, Void 0)  -> aux f i k tl
+     | EBind (tl, a, _)       ->
         let err kk = aux f (succ i) (k + kk) tl in
        let f j = f i j (k + j) in
        Entity.resolve err f id a
-     | EProj _          -> assert false (* TODO *)
+     | EProj _                -> assert false (* TODO *)
    in
    aux f 0 0 lenv
 
 let rec get_name err f i j = function
    | ESort                      -> err i
-   | EBind (tl, a, Abst [])     -> get_name err f i j tl
-   | EBind (tl, a, Abbr [])     -> get_name err f i j tl
-   | EBind (tl, a, Void 0)      -> get_name err f i j tl
+   | EBind (tl, _, Abst [])
+   | EBind (tl, _, Abbr [])
+   | EBind (tl, _, Void 0)      -> get_name err f i j tl
    | EBind (_, a, _) when i = 0 -> 
       let err () = err i in
       Entity.get_name err f j a
@@ -77,3 +80,17 @@ let rec get_name err f i j = function
    | EProj (tl, _, e)           ->
       let err i = get_name err f i j tl in 
       get_name err f i j e
+
+let get_index err f i j lenv =
+   let rec aux f i k = function
+      | ESort                      -> err i
+      | EBind (tl, _, Abst [])
+      | EBind (tl, _, Abbr [])
+      | EBind (tl, _, Void 0)      -> aux f i k tl
+      | EBind (_, a, _) when i = 0 ->
+        if Entity.count_names a > j then f (k + j) else err i
+      | EBind (tl, a, _)           -> 
+         aux f (pred i) (k + Entity.count_names a) tl
+      | EProj _                    -> assert false (* TODO *)
+   in
+   aux f i 0 lenv