X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=components%2Fcic%2FcicUtil.ml;h=6e07a4995d8ed5d436f43138a1374123b6f79f65;hb=59c85666e58d43d1dce56a2456db5f1ec223c1c3;hp=51d84392bfaff40f8932ac8b8b471dd191c9cdf3;hpb=4b0c8ab87297a2bcf9998c098fafbba44e8b641b;p=helm.git

diff --git a/components/cic/cicUtil.ml b/components/cic/cicUtil.ml
index 51d84392b..6e07a4995 100644
--- a/components/cic/cicUtil.ml
+++ b/components/cic/cicUtil.ml
@@ -207,6 +207,17 @@ let attributes_of_obj = function
   | Cic.CurrentProof (_, _, _, _, _, attributes)
   | Cic.InductiveDefinition (_, _, _, attributes) ->
       attributes
+
+let arity_of_composed_coercion obj =
+  let attrs = attributes_of_obj obj in
+  try
+    let tag=List.find (function `Class (`Coercion _) -> true|_->false) attrs in
+    match tag with
+    |  `Class (`Coercion n) -> n
+    | _-> assert false 
+  with Not_found -> 0
+;;
+      
 let rec mk_rels howmany from =
   match howmany with 
   | 0 -> []
@@ -389,3 +400,51 @@ let rec metas_of_term = function
   | _ -> []
 ;;      
 
+module MetaOT = struct
+  type t = int * Cic.term option list
+  let compare = Pervasives.compare
+end
+
+module S = Set.Make(MetaOT)
+
+let rec metas_of_term_set = function
+  | Cic.Meta (i, c) -> S.singleton (i,c)
+  | Cic.Var (_, ens) 
+  | Cic.Const (_, ens) 
+  | Cic.MutInd (_, _, ens) 
+  | Cic.MutConstruct (_, _, _, ens) ->
+      List.fold_left 
+        (fun s (_,t) -> S.union s (metas_of_term_set t)) 
+        S.empty ens
+  | Cic.Cast (s, t)
+  | Cic.Prod (_, s, t)
+  | Cic.Lambda (_, s, t)
+  | Cic.LetIn (_, s, t) -> S.union (metas_of_term_set s) (metas_of_term_set t)
+  | Cic.Appl l -> 
+      List.fold_left 
+        (fun s t -> S.union s (metas_of_term_set t)) 
+        S.empty l
+  | Cic.MutCase (uri, i, s, t, l) ->
+      S.union 
+        (S.union (metas_of_term_set s)  (metas_of_term_set t))
+        (List.fold_left 
+          (fun s t -> S.union s (metas_of_term_set t)) 
+          S.empty l)
+  | Cic.Fix (_, il) ->
+      (List.fold_left 
+        (fun s (_,_,t1,t2) -> 
+          S.union s (S.union (metas_of_term_set t1) (metas_of_term_set t2))))
+        S.empty il
+  | Cic.CoFix (i, il) ->
+      (List.fold_left 
+        (fun s (_,t1,t2) -> 
+          S.union s (S.union (metas_of_term_set t1) (metas_of_term_set t2))))
+        S.empty il
+  | _ -> S.empty
+;;      
+
+let metas_of_term_set t = 
+  let s = metas_of_term_set t in
+  S.elements s
+;;
+