X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FproofEngineHelpers.ml;h=2d576c3d8badf7c3f760041e3aa40d2a808e563b;hb=63b9459d46ea28b3f47116690e7d06cbba7561fe;hp=ccac132ef6b631b46504d9e63b96c1af5ed8804c;hpb=17f33fa8cb65de1f3edcba6ac750bbdb4d061117;p=helm.git

diff --git a/helm/ocaml/tactics/proofEngineHelpers.ml b/helm/ocaml/tactics/proofEngineHelpers.ml
index ccac132ef..2d576c3d8 100644
--- a/helm/ocaml/tactics/proofEngineHelpers.ml
+++ b/helm/ocaml/tactics/proofEngineHelpers.ml
@@ -23,44 +23,6 @@
  * http://cs.unibo.it/helm/.
  *)
 
-(* mk_fresh_name context name typ                      *)
-(* returns an identifier which is fresh in the context *)
-(* and that resembles [name] as much as possible.      *)
-(* [typ] will be the type of the variable              *)
-let mk_fresh_name context name ~typ =
- let module C = Cic in
-  let basename =
-   match name with
-      C.Anonymous ->
-       (*CSC: great space for improvements here *)
-       (try
-         (match CicTypeChecker.type_of_aux' [] context typ with
-             C.Sort C.Prop -> "H"
-	   | C.Sort C.CProp -> "H"
-           | C.Sort C.Set -> "x"
-           | _ -> "H"
-         )
-        with CicTypeChecker.TypeCheckerFailure _ -> "H"
-       )
-    | C.Name name ->
-       Str.global_replace (Str.regexp "[0-9]*$") "" name
-  in
-   let already_used name =
-    List.exists (function Some (C.Name n,_) -> n=name | _ -> false) context
-   in
-    if not (already_used basename) then
-     C.Name basename
-    else
-     let rec try_next n =
-      let name' = basename ^ string_of_int n in
-       if already_used name' then
-        try_next (n+1)
-       else
-        C.Name name'
-     in
-      try_next 1
-;;
-
 let new_meta_of_proof ~proof:(_, metasenv, _, _) =
   CicMkImplicit.new_meta metasenv
 
@@ -86,7 +48,11 @@ let subst_meta_in_proof proof meta term newmetasenv =
       ) metasenv'
     in
      let bo' = subst_in bo in
-      let newproof = uri,metasenv'',bo',ty in
+     (* Metavariables can appear also in the *statement* of the theorem
+      * since the parser does not reject as statements terms with
+      * metavariable therein *)
+     let ty' = subst_in ty in
+      let newproof = uri,metasenv'',bo',ty' in
        (newproof, metasenv'')
 
 (*CSC: commento vecchio *)
@@ -104,6 +70,10 @@ let subst_meta_in_proof proof meta term newmetasenv =
 let subst_meta_and_metasenv_in_proof proof meta subst_in newmetasenv =
  let (uri,_,bo,ty) = proof in
   let bo' = subst_in bo in
+  (* Metavariables can appear also in the *statement* of the theorem
+   * since the parser does not reject as statements terms with
+   * metavariable therein *)
+  let ty' = subst_in ty in
   let metasenv' =
    List.fold_right
     (fun metasenv_entry i ->
@@ -123,6 +93,6 @@ let subst_meta_and_metasenv_in_proof proof meta subst_in newmetasenv =
        | _ -> i
     ) newmetasenv []
   in
-   let newproof = uri,metasenv',bo',ty in
+   let newproof = uri,metasenv',bo',ty' in
     (newproof, metasenv')