X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FequalityTactics.ml;h=5a091b7ad895cb196243c9d96c0394e8330fe1f3;hb=db57b08d789de234c152c3f2a665000311b7335d;hp=94cb0624bacd7911e184631750ef5fb97b7bc3a4;hpb=d1126c6b78a3333bbf415daf027004496b77c2f4;p=helm.git

diff --git a/helm/ocaml/tactics/equalityTactics.ml b/helm/ocaml/tactics/equalityTactics.ml
index 94cb0624b..5a091b7ad 100644
--- a/helm/ocaml/tactics/equalityTactics.ml
+++ b/helm/ocaml/tactics/equalityTactics.ml
@@ -47,7 +47,7 @@ let rewrite_tac ~direction ~pattern equality =
       CicUniv.empty_ugraph in 
   let (ty_eq,metasenv',arguments,fresh_meta) =
    ProofEngineHelpers.saturate_term
-    (ProofEngineHelpers.new_meta_of_proof proof) metasenv context ty_eq in
+    (ProofEngineHelpers.new_meta_of_proof proof) metasenv context ty_eq 0 in
   let equality =
    if List.length arguments = 0 then
     equality
@@ -62,7 +62,7 @@ let rewrite_tac ~direction ~pattern equality =
         in
         let eq_ind = C.Const (ind_uri uri,[]) in
          if_right_to_left (eq_ind, ty, t2, t1) (eq_ind, ty, t1, t2)
-    | _ -> raise (PET.Fail "Rewrite: argument is not a proof of an equality") in
+    | _ -> raise (PET.Fail (lazy "Rewrite: argument is not a proof of an equality")) in
   (* now we always do as if direction was `LeftToRight *)
   let fresh_name = 
     FreshNamesGenerator.mk_fresh_name 
@@ -152,7 +152,7 @@ let replace_tac ~pattern ~with_what =
     metasenv context with_what CicUniv.empty_ugraph in
   let whats =
    match selected_terms_with_context with
-      [] -> raise (ProofEngineTypes.Fail "Replace: no term selected")
+      [] -> raise (ProofEngineTypes.Fail (lazy "Replace: no term selected"))
     | l ->
       List.map
        (fun (context_of_t,t) ->
@@ -173,7 +173,7 @@ let replace_tac ~pattern ~with_what =
             (*CSC: we could implement something stronger by completely changing
               the semantics of the tactic *)
             raise (ProofEngineTypes.Fail
-             "Replace: one of the selected terms is not closed") in
+             (lazy "Replace: one of the selected terms is not closed")) in
          let ty_of_t_in_context,u = (* TASSI: FIXME *)
           CicTypeChecker.type_of_aux' metasenv context t_in_context
            CicUniv.empty_ugraph in
@@ -186,7 +186,7 @@ let replace_tac ~pattern ~with_what =
          else
           raise
            (ProofEngineTypes.Fail
-             "Replace: one of the selected terms and the term to be replaced with have not convertible types")
+             (lazy "Replace: one of the selected terms and the term to be replaced with have not convertible types"))
        ) l in
   let rec aux n whats status =
    match whats with
@@ -255,7 +255,7 @@ let symmetry_tac =
 	    ~term: (C.Const (LibraryObjects.sym_eq_URI uri, []))) 
 	   (proof,goal)
 
-      | _ -> raise (ProofEngineTypes.Fail "Symmetry failed")
+      | _ -> raise (ProofEngineTypes.Fail (lazy "Symmetry failed"))
  in
   ProofEngineTypes.mk_tactic symmetry_tac
 ;;
@@ -280,7 +280,7 @@ let transitivity_tac ~term =
             [PrimitiveTactics.exact_tac ~term ; T.id_tac ; T.id_tac])
           status
 
-      | _ -> raise (ProofEngineTypes.Fail "Transitivity failed")
+      | _ -> raise (ProofEngineTypes.Fail (lazy "Transitivity failed"))
  in
   ProofEngineTypes.mk_tactic (transitivity_tac ~term)
 ;;