X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FeliminationTactics.ml;h=27cb1cc33cacf6663db8ec41a6f6edb12c76a858;hb=4167cea65ca58897d1a3dbb81ff95de5074700cc;hp=96dc5d15a17c05194b24d88b3ba0f9a82a077e6e;hpb=cb473667ca89549ed0ca6dd2bfb03a5fe9eeaa82;p=helm.git

diff --git a/helm/ocaml/tactics/eliminationTactics.ml b/helm/ocaml/tactics/eliminationTactics.ml
index 96dc5d15a..27cb1cc33 100644
--- a/helm/ocaml/tactics/eliminationTactics.ml
+++ b/helm/ocaml/tactics/eliminationTactics.ml
@@ -97,22 +97,25 @@ let elim_clear_tac ~mk_fresh_name_callback ~types ~what =
 	                   ~continuation:(S.clear what)
 	 in
 	 E.apply_tactic tac status
-      else raise (E.Fail "unexported elim_clear: not an eliminable type") 
+      else raise (E.Fail (lazy "unexported elim_clear: not an eliminable type"))
    in
    E.mk_tactic elim_clear_tac
 
 (* elim type ****************************************************************)
 
-let elim_type_tac ?(mk_fresh_name_callback = F.mk_fresh_name ~subst:[]) 
-                  ?depth ?using what =
-   let elim what = P.elim_intros_simpl_tac ?using ?depth ~mk_fresh_name_callback what in
-   let elim_type_tac status =
-      let tac = T.thens ~start: (P.cut_tac what)
-                        ~continuations:[elim (C.Rel 1); T.id_tac]
-      in
-      E.apply_tactic tac status
-   in
-   E.mk_tactic elim_type_tac
+let elim_type_tac ?(mk_fresh_name_callback = F.mk_fresh_name ~subst:[]) ?depth
+  ?using what
+=
+  let elim what =
+    P.elim_intros_simpl_tac ?using ?depth ~mk_fresh_name_callback what
+  in
+  let elim_type_tac status =
+    let tac =
+      T.thens ~start: (P.cut_tac what) ~continuations:[elim (C.Rel 1); T.id_tac]
+    in
+    E.apply_tactic tac status
+  in
+  E.mk_tactic elim_type_tac
 
 (* decompose ****************************************************************)
 
@@ -123,9 +126,7 @@ let debug = false
 let debug_print = fun _ -> ()
 
   (** debugging print *)
-let warn s =
-  if debug then
-    debug_print ("DECOMPOSE: " ^ s)
+let warn s = debug_print (lazy ("DECOMPOSE: " ^ (Lazy.force s)))
 
 (* search in term the Inductive Types and return a list of uris as triples like this: (uri,typeno,exp_named_subst) *)
 let search_inductive_types ty =
@@ -161,7 +162,7 @@ module R = CicReduction
 
 	let rec elim_clear_tac ~term' ~nr_of_hyp_still_to_elim status =
          let (proof, goal) = status in
-         warn ("nr_of_hyp_still_to_elim=" ^ (string_of_int nr_of_hyp_still_to_elim));
+         warn (lazy ("nr_of_hyp_still_to_elim=" ^ (string_of_int nr_of_hyp_still_to_elim)));
          if nr_of_hyp_still_to_elim <> 0 then
           let _,metasenv,_,_ = proof in
            let _,context,_ = CicUtil.lookup_meta goal metasenv in
@@ -169,12 +170,12 @@ module R = CicReduction
             let termty,_ = 
 	      CicTypeChecker.type_of_aux' metasenv context term' 
 		CicUniv.empty_ugraph in
-             warn ("elim_clear termty= " ^ CicPp.ppterm termty);
+             warn (lazy ("elim_clear termty= " ^ CicPp.ppterm termty));
              match termty with
                 C.MutInd (uri,typeno,exp_named_subst)
               | C.Appl((C.MutInd (uri,typeno,exp_named_subst))::_) 
                  when (List.mem (uri,typeno,exp_named_subst) urilist) ->
-                   warn ("elim " ^ CicPp.ppterm termty);
+                   warn (lazy ("elim " ^ CicPp.ppterm termty));
 		   ProofEngineTypes.apply_tactic 
                    (T.then_ 
                       ~start:(P.elim_intros_simpl_tac term')
@@ -185,7 +186,7 @@ module R = CicReduction
                           let _,metasenv,_,_ = proof in
                            let _,context,_ = CicUtil.lookup_meta goal metasenv in
                             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));
+                             warn (lazy ("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
@@ -197,15 +198,15 @@ module R = CicReduction
                              (T.then_ 
                                 ~start:(
                                   if (term'==term) (* if it's the first application of elim, there's no need to clear the hyp *) 
-                                   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)
+                                   then begin debug_print (lazy ("%%%%%%% no clear")); T.id_tac end
+                                   else begin debug_print (lazy ("%%%%%%% 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
                         )))
                       status
               | _ ->
                    let new_nr_of_hyp_still_to_elim = nr_of_hyp_still_to_elim - 1 in 
-                    warn ("fail; hyp=" ^ (string_of_int new_nr_of_hyp_still_to_elim));
+                    warn (lazy ("fail; hyp=" ^ (string_of_int new_nr_of_hyp_still_to_elim)));
                     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
          else (* no hyp to elim left in this goal *)
           ProofEngineTypes.apply_tactic T.id_tac status