X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FnegationTactics.ml;h=fc21ec4052e1348be930f66520740d6241d34410;hb=b3bfd6b249600b15552c890306a635aee30c2a74;hp=25c29918fc157097b7cd1bf526dd77ff95073889;hpb=bac72fcaa876137ab7a5630e0c1badc2a627dce8;p=helm.git

diff --git a/helm/ocaml/tactics/negationTactics.ml b/helm/ocaml/tactics/negationTactics.ml
index 25c29918f..fc21ec405 100644
--- a/helm/ocaml/tactics/negationTactics.ml
+++ b/helm/ocaml/tactics/negationTactics.ml
@@ -29,10 +29,10 @@ let absurd_tac ~term ~status:((proof,goal) as status) =
   let module U = UriManager in
   let module P = PrimitiveTactics in
    let _,metasenv,_,_ = proof in
-    let _,context,ty = List.find (function (m,_,_) -> m=goal) metasenv in
+    let _,context,ty = CicUtil.lookup_meta goal metasenv in
      if ((CicTypeChecker.type_of_aux' metasenv context term) = (C.Sort C.Prop)) (* ma questo controllo serve?? *)
       then P.apply_tac 
-              ~term:(C.Appl [(C.Const ((U.uri_of_string "cic:/Coq/Init/Logic/absurd.con") , [] )) ; term ; ty]) ~status
+              ~term:(C.Appl [(C.Const (HelmLibraryObjects.Logic.absurd_URI , [] )) ; term ; ty]) ~status
       else raise (ProofEngineTypes.Fail "Absurd: Not a Proposition")
 ;;
 
@@ -50,7 +50,7 @@ let contradiction_tac ~status =
            ~start:
              (EliminationTactics.elim_type_tac 
                 ~term:
-                  (C.MutInd ((U.uri_of_string "cic:/Coq/Init/Logic/False.ind"), 0, [])))
+                  (C.MutInd (HelmLibraryObjects.Logic.false_URI, 0, [])))
            ~continuation: VariousTactics.assumption_tac)
     ~status
    with