new instantiate, only known bug is w.r.t. in/out scope and file matita/contribs/ng_as...

[helm.git] / helm / software / components / ng_kernel / nCicUntrusted.ml

diff --git a/helm/software/components/ng_kernel/nCicUntrusted.ml b/helm/software/components/ng_kernel/nCicUntrusted.ml
index b48db58ecbafcd15fcb3af9cff1d740b2daeb6f7..771f3070bda456a9ae31c91000bf96b553fc4492 100644 (file)
--- a/helm/software/components/ng_kernel/nCicUntrusted.ml
+++ b/helm/software/components/ng_kernel/nCicUntrusted.ml
@@ -244,3 +244,34 @@ let rec apply_subst_metasenv subst = function
 (* hide optional arg *)
 let apply_subst s c t = apply_subst s c t;;
 
+
+type meta_kind = [ `IsSort | `IsType | `IsTerm ]
+
+let is_kind x = x = `IsSort || x = `IsType || x = `IsTerm ;;
+
+let kind_of_meta l =
+  try 
+    (match List.find is_kind l with
+    | `IsSort | `IsType | `IsTerm as x -> x
+    | _ -> assert false)
+  with 
+   Not_found -> assert false
+;;
+
+let rec replace_in_metasenv i f = function
+  | [] -> assert false
+  | (j,e)::tl when j=i -> (i,f e) :: tl
+  | x::tl -> x :: replace_in_metasenv i f tl
+;;
+          
+let set_kind newkind attrs = 
+  newkind :: List.filter (fun x -> not (is_kind x)) attrs 
+;;
+
+let max_kind k1 k2 = 
+  match k1, k2 with
+  | `IsSort, _ | _, `IsSort -> `IsSort
+  | `IsType, _ | _, `IsType -> `IsType
+  | _ -> `IsTerm
+;;
+