version 0.7.1

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

diff --git a/helm/ocaml/tactics/eliminationTactics.ml b/helm/ocaml/tactics/eliminationTactics.ml
index 15645951e29a0af9920195a60dca96ff8ce9d2ec..e52fff6e4452f671c2cc6e5634c41b2e03504716 100644 (file)
--- a/helm/ocaml/tactics/eliminationTactics.ml
+++ b/helm/ocaml/tactics/eliminationTactics.ml
@@ -27,11 +27,12 @@
 
   (** perform debugging output? *)
 let debug = false
+let debug_print = fun _ -> ()
 
   (** debugging print *)
 let warn s =
   if debug then
-    prerr_endline ("DECOMPOSE: " ^ s)
+    debug_print ("DECOMPOSE: " ^ s)
 
 
 
@@ -56,18 +57,19 @@ let induction_tac ~term status =
 ;;
 *)
 
-let elim_type_tac ~term =
- let elim_type_tac ~term status =
+let elim_type_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[]) 
+                  ?depth ?using what =
+ let elim_type_tac status =
    let module C = Cic in
    let module P = PrimitiveTactics in
    let module T = Tacticals in
     ProofEngineTypes.apply_tactic 
      (T.thens
-      ~start: (P.cut_tac term)
-      ~continuations:[ P.elim_intros_simpl_tac ~term:(C.Rel 1) ; T.id_tac ])
+      ~start: (P.cut_tac what)
+      ~continuations:[ P.elim_intros_simpl_tac ?depth ?using ~mk_fresh_name_callback (C.Rel 1) ; T.id_tac ])
      status
  in
-  ProofEngineTypes.mk_tactic (elim_type_tac ~term)
+  ProofEngineTypes.mk_tactic elim_type_tac
 ;;
 
 
@@ -106,7 +108,7 @@ let decompose_tac ?(uris_choice_callback=(function l -> l)) term =
          | (C.Appl ((C.MutInd (uri,typeno,exp_named_subst))::applist)) (* when (not (List.mem (uri,typeno,exp_named_subst) urilist)) *) -> 
                (uri,typeno,exp_named_subst)::(List.fold_left search_inductive_types urilist applist)
          | _ -> urilist
-         (* N.B: in un caso tipo (and A !C:Prop.(or B C)) l'or *non* viene selezionato! *)
+         (* N.B: in un caso tipo (and A forall C:Prop.(or B C)) l'or *non* viene selezionato! *)
        in 
        let rec purge_duplicates urilist = 
         let rec aux triple urilist =
@@ -147,7 +149,7 @@ let decompose_tac ?(uris_choice_callback=(function l -> l)) term =
                    warn ("elim " ^ CicPp.ppterm termty);
                   ProofEngineTypes.apply_tactic 
                    (T.then_ 
-                      ~start:(P.elim_intros_simpl_tac ~term:term')
+                      ~start:(P.elim_intros_simpl_tac term')
                       ~continuation:(
                         (* clear the hyp that has just been eliminated *)
                         ProofEngineTypes.mk_tactic (fun status -> 
@@ -157,12 +159,18 @@ let decompose_tac ?(uris_choice_callback=(function l -> l)) term =
                             let new_context_len = List.length context in   
                              warn ("newcon=" ^ (string_of_int new_context_len) ^ " & oldcon=" ^ (string_of_int old_context_len) ^ " & old_nr_of_hyp=" ^ (string_of_int nr_of_hyp_still_to_elim));
                              let new_nr_of_hyp_still_to_elim = nr_of_hyp_still_to_elim + (new_context_len - old_context_len) - 1 in
+                             let hyp_name =
+                              match List.nth context new_nr_of_hyp_still_to_elim with
+                                 None
+                               | Some (Cic.Anonymous,_) -> assert false
+                               | Some (Cic.Name name,_) -> name
+                             in
                             ProofEngineTypes.apply_tactic
                              (T.then_ 
                                 ~start:(
                                   if (term'==term) (* if it's the first application of elim, there's no need to clear the hyp *) 
-                                   then begin prerr_endline ("%%%%%%% no clear"); T.id_tac end
-                                   else begin prerr_endline ("%%%%%%% clear " ^ (string_of_int (new_nr_of_hyp_still_to_elim))); (S.clear ~hyp:(List.nth context (new_nr_of_hyp_still_to_elim))) end)
+                                   then begin debug_print ("%%%%%%% no clear"); T.id_tac end
+                                   else begin debug_print ("%%%%%%% clear " ^ (string_of_int (new_nr_of_hyp_still_to_elim))); (S.clear ~hyp:hyp_name) end)
                                 ~continuation:(ProofEngineTypes.mk_tactic (elim_clear_tac ~term':(C.Rel new_nr_of_hyp_still_to_elim) ~nr_of_hyp_still_to_elim:new_nr_of_hyp_still_to_elim)))
                                 status
                         )))