added homepage URL, now we have one

[helm.git] / helm / ocaml / tactics / proofEngineTypes.ml

diff --git a/helm/ocaml/tactics/proofEngineTypes.ml b/helm/ocaml/tactics/proofEngineTypes.ml
index 334c594da4b9d7d5564d5305825d463b83736e7d..9e92a076c47e46aa6a920d177127a09469df413a 100644 (file)
--- a/helm/ocaml/tactics/proofEngineTypes.ml
+++ b/helm/ocaml/tactics/proofEngineTypes.ml
@@ -26,20 +26,50 @@
   (**
     current proof (proof uri * metas * (in)complete proof * term to be prooved)
   *)
-type proof = UriManager.uri * Cic.metasenv * Cic.term * Cic.term
+type proof = UriManager.uri option * Cic.metasenv * Cic.term * Cic.term
   (** current goal, integer index *)
 type goal = int
 type status = proof * goal
+
+let initial_status ty metasenv =
+  let rec aux max = function
+    | [] -> max + 1
+    | (idx, _, _) :: tl ->
+        if idx > max then
+          aux idx tl
+        else
+          aux max tl
+  in
+  let newmeta_idx = aux 0 metasenv in
+  let proof =
+    None, (newmeta_idx, [], ty) :: metasenv, Cic.Meta (newmeta_idx, []), ty
+  in
+  (proof, newmeta_idx)
+
   (**
     a tactic: make a transition from one status to another one or, usually,
     raise a "Fail" (@see Fail) exception in case of failure
   *)
   (** an unfinished proof with the optional current goal *)
-type tactic = status:status -> proof * goal list
+type tactic = status -> proof * goal list
+
+  (** creates an opaque tactic from a status->proof*goal list function *)
+let mk_tactic t = t
+
+ (** what, hypothesis patterns, conclusion pattern *)
+type pattern = Cic.term option * (string * Cic.term) list * Cic.term
+let conclusion_pattern t = t,[],Cic.Implicit (Some `Hole)
 
   (** tactic failure *)
 exception Fail of string
 
+  (** 
+    calls the opaque tactic on the status, restoring the original 
+    universe graph if the tactic Fails
+  *)
+let apply_tactic t status = 
+  t status
+
   (** constraint: the returned value will always be constructed by Cic.Name **)
 type mk_fresh_name_type =
  Cic.metasenv -> Cic.context -> Cic.name -> typ:Cic.term -> Cic.name