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diff --git a/contrib7/interface/Centaur.v b/contrib7/interface/Centaur.v
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+(*
+Declare ML Module "ctast".
+Declare ML Module "paths".
+Declare ML Module "name_to_ast".
+Declare ML Module "xlate".
+Declare ML Module "vtp".
+Declare ML Module "translate".
+Declare ML Module "pbp".
+Declare ML Module "blast".
+Declare ML Module "dad".
+Declare ML Module "showproof_ct".
+Declare ML Module "showproof".
+Declare ML Module "debug_tac".
+Declare ML Module "paths".
+Declare ML Module "history".
+Declare ML Module "centaur".
+(* Require Export Illustrations. *)
+(* Require Export AddDad. *)
+(*
+Grammar vernac vernac : ast :=
+  goal_cmd [ "Goal" "Cmd" numarg($n) "with" tacarg($tac) "." ] ->
+        [(GOAL_CMD $n (TACTIC $tac))]
+| kill_proof_after [ "Kill" "Proof" "after"  numarg($n)"." ] -> [(KILL_NODE $n)]
+| kill_proof_at [ "Kill" "Proof" "at"  numarg($n)"." ] -> [(KILL_NODE $n)]
+| kill_sub_proof [ "Kill" "SubProof" numarg($n) "." ] -> [(KILL_SUB_PROOF $n)]
+
+| print_past_goal [ "Print" "Past" "Goal" numarg($n) "." ] ->
+        [(PRINT_GOAL_AT $n) ]
+
+| check_in_goal [ "CHECK_IN_GOAL" numarg($n) constrarg($c) "." ] ->
+       [(CHECK_IN_GOAL "CHECK" $n $c)]
+| eval_in_goal [ "EVAL_IN_GOAL" numarg($n) constrarg($c) "." ] ->
+       [(CHECK_IN_GOAL "EVAL" $n $c)]
+| compute_in_goal [ "COMPUTE_IN_GOAL" numarg($n) constrarg($c) "." ] ->
+       [(CHECK_IN_GOAL "COMPUTE" $n $c)]
+| centaur_reset [ "Centaur" "Reset" identarg($id) "." ] -> [(Centaur_Reset $id)]
+(*| show_dad_rules [ "Show" "Dad" "Rules" "." ] -> [(Show_dad_rules)]*)
+| start_pcoq [ "Start" "Pcoq" "Mode" "." ] -> [ (START_PCOQ) ]
+| start_pcoq [ "Start" "Pcoq" "Debug" "Mode" "." ] -> [ (START_PCOQ_DEBUG) ].
+Grammar vernac ne_id_list : ast list :=
+   id_one [ identarg($id)] -> [$id]
+ | id_more [identarg($id) ne_id_list($others)] -> [$id ($LIST $others)].
+
+Grammar tactic ne_num_list : ast list :=
+  ne_last [ numarg($n) ] -> [ $n ]
+| ne_num_ste  [ numarg($n) ne_num_list($ns) ] -> [ $n ($LIST $ns)].
+
+Grammar tactic two_numarg_list : ast list :=
+  two_single_and_ne [ numarg($n) "to"  ne_num_list($ns)] ->
+        [$n (TACTIC (to)) ($LIST $ns)]
+| two_rec [ numarg($n) two_numarg_list($ns)] -> [ $n ($LIST $ns)].
+
+Grammar tactic simple_tactic : ast :=
+  pbp0 [ "Pbp" ] -> [(PcoqPbp)]
+| pbp1 [ "Pbp" ne_num_list($ns) ] ->
+         [ (PcoqPbp ($LIST $ns)) ]
+| pbp2 [ "Pbp" identarg($id) ] -> [ (PcoqPbp $id) ]
+| pbp3 [ "Pbp" identarg($id) ne_num_list($ns)] ->
+         [ (PcoqPbp $id ($LIST $ns)) ]
+| blast1 [ "Blast" ne_num_list($ns) ] ->
+         [ (PcoqBlast ($LIST $ns)) ]
+| dad00 [ "Dad" "to" ] -> [(Dad (TACTIC (to)))]
+| dad01 [ "Dad" "to" ne_num_list($ns) ] ->
+        [(Dad (TACTIC (to)) ($LIST $ns))]
+| dadnn [ "Dad" two_numarg_list($ns) ] -> [ (Dad ($LIST $ns)) ]
+| debug_tac [ "DebugTac" tactic($tac) ] ->
+  [(CtDebugTac (TACTIC $tac))]
+| on_then_empty [ "OnThen" tactic($tac1) tactic($tac2) ] ->
+    [(OnThen (TACTIC $tac1) (TACTIC $tac2))]
+| on_then_ne [ "OnThen" tactic($tac1) tactic($tac2) ne_num_list($l) ] ->
+  [(OnThen (TACTIC $tac1) (TACTIC $tac2) ($LIST $l))]
+| debug_tac2 [ "DebugTac2" tactic($tac) ] ->
+  [(CtDebugTac2 (TACTIC $tac))].
+
+
+(* Maybe we should have syntactic rules to make sur that syntax errors are
+   displayed with a readable syntax.  It is not sure, since the error reporting
+   procedure changed from V6.1 and does not reprint the command anymore. *)
+Grammar vernac vernac : ast :=
+  text_proof_flag_on [ "Text" "Mode" "fr" "." ] ->
+       [(TEXT_MODE (AST "fr"))]
+| text_proof_flag_on [ "Text" "Mode" "en" "." ] ->
+       [(TEXT_MODE (AST "en"))]
+| text_proof_flag_on [ "Text" "Mode" "Off" "." ] ->
+       [(TEXT_MODE (AST "off"))].
+
+*)
+*)