X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;ds=inline;f=helm%2Focaml%2Ftactics%2FproofEngineTypes.ml;h=2e25e4a057389f7149bfa64334bcbefdca615d84;hb=04ade947888ac1115dfe104714bed61c32e1c9c3;hp=b4992aca3496420c9f1277a50b9065aed36985c5;hpb=2e9230cc95280f928b15c624ee4564fffea56373;p=helm.git

diff --git a/helm/ocaml/tactics/proofEngineTypes.ml b/helm/ocaml/tactics/proofEngineTypes.ml
index b4992aca3..2e25e4a05 100644
--- a/helm/ocaml/tactics/proofEngineTypes.ml
+++ b/helm/ocaml/tactics/proofEngineTypes.ml
@@ -56,6 +56,32 @@ type tactic = status -> proof * goal list
   (** creates an opaque tactic from a status->proof*goal list function *)
 let mk_tactic t = t
 
+type reduction = Cic.context -> Cic.term -> Cic.term
+
+type lazy_term =
+  Cic.context -> Cic.metasenv -> CicUniv.universe_graph ->
+    Cic.term * Cic.metasenv * CicUniv.universe_graph
+
+let const_lazy_term t =
+  (fun _ metasenv ugraph -> t, metasenv, ugraph)
+
+type lazy_reduction =
+  Cic.context -> Cic.metasenv -> CicUniv.universe_graph ->
+    reduction * Cic.metasenv * CicUniv.universe_graph
+
+let const_lazy_reduction red =
+  (fun _ metasenv ugraph -> red, metasenv, ugraph)
+
+type pattern = lazy_term option * (string * Cic.term) list * Cic.term
+
+let conclusion_pattern t =
+  let t' = 
+    match t with
+    | None -> None
+    | Some t -> Some (fun _ m u -> t, m, u)
+  in
+  t',[],Cic.Implicit (Some `Hole)
+
   (** tactic failure *)
 exception Fail of string
 
@@ -64,12 +90,7 @@ exception Fail of string
     universe graph if the tactic Fails
   *)
 let apply_tactic t status = 
-  let saved_univ = CicUniv.get_working() in
-  try 
-    t status
-  with Fail s ->
-    CicUniv.set_working saved_univ;
-    raise (Fail s)
+  t status
 
   (** constraint: the returned value will always be constructed by Cic.Name **)
 type mk_fresh_name_type =