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

diff --git a/helm/ocaml/tactics/proofEngineHelpers.ml b/helm/ocaml/tactics/proofEngineHelpers.ml
index a0fef6037982b57a0847d3d2ca98b8ac0636f149..22b6c8487a8348d74a80f896c501a26f3263aba1 100644 (file)
--- a/helm/ocaml/tactics/proofEngineHelpers.ml
+++ b/helm/ocaml/tactics/proofEngineHelpers.ml
@@ -554,12 +554,17 @@ exception Fail of string
    in
     subst,metasenv,ugraph,context_terms, ty_terms
 
-let locate_in_term what ~where =
+(** locate_in_term equality what where context
+* [what] must match a subterm of [where] according to [equality]
+* It returns the matched terms together with their contexts in [where]
+* [equality] defaults to physical equality
+* [context] must be the context of [where]
+*)
+let locate_in_term ?(equality=(==))what ~where context =
   let add_ctx context name entry =
-      (Some (name, entry)) :: context
-  in
+      (Some (name, entry)) :: context in
   let rec aux context where =
-   if what == where then context
+   if equality what where then [context,where]
    else
     match where with
     | Cic.Implicit _
@@ -600,8 +605,36 @@ let locate_in_term what ~where =
   and auxs context tl =  (* as aux for list of terms *)
     List.concat (List.map (fun t -> aux context t) tl)
   in
-   aux [] where
+   aux context where
 
+(** locate_in_term equality what where context
+* [what] must match a subterm of [where] according to [equality]
+* It returns the matched terms together with their contexts in [where]
+* [equality] defaults to physical equality
+* [context] must be the context of [where]
+*)
+let locate_in_conjecture ?(equality=(==)) what (_,context,ty) =
+ let context,res =
+  List.fold_right
+   (fun entry (context,res) ->
+     match entry with
+        None -> entry::context, res
+      | Some (_, Cic.Decl ty) ->
+         let res = res @ locate_in_term what ~where:ty context in
+         let context' = entry::context in
+          context',res
+      | Some (_, Cic.Def (bo,ty)) ->
+         let res = res @ locate_in_term what ~where:bo context in
+         let res =
+          match ty with
+             None -> res
+           | Some ty ->
+              res @ locate_in_term what ~where:ty context in
+         let context' = entry::context in
+          context',res
+   ) context ([],[])
+ in
+  res @ locate_in_term what ~where:ty context
 
 (* saturate_term newmeta metasenv context ty                                  *)
 (* Given a type [ty] (a backbone), it returns its head and a new metasenv in  *)