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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(*i $Id: tactic_debug.mli,v 1.12.2.1 2004/07/16 19:30:50 herbelin Exp $ i*)
+
+open Environ
+open Pattern
+open Proof_type
+open Names
+open Tacexpr
+open Term
+
+(* This module intends to be a beginning of debugger for tactic expressions.
+   Currently, it is quite simple and we can hope to have, in the future, a more
+   complete panel of commands dedicated to a proof assistant framework *)
+
+(* Debug information *)
+type debug_info =
+  | DebugOn of int
+  | DebugOff
+
+(* Prints the state and waits *)
+val debug_prompt :
+  int -> goal sigma -> glob_tactic_expr -> (debug_info -> 'a) -> 'a
+
+(* Prints a constr *)
+val db_constr : debug_info -> env -> constr -> unit
+
+(* Prints the pattern rule *)
+val db_pattern_rule :
+  debug_info -> int -> (constr_pattern,glob_tactic_expr) match_rule -> unit
+
+(* Prints a matched hypothesis *)
+val db_matched_hyp :
+  debug_info -> env -> identifier * constr -> name -> unit
+
+(* Prints the matched conclusion *)
+val db_matched_concl : debug_info -> env -> constr -> unit
+
+(* Prints a success message when the goal has been matched *)
+val db_mc_pattern_success : debug_info -> unit
+
+(* Prints a failure message for an hypothesis pattern *)
+val db_hyp_pattern_failure :
+  debug_info -> env -> name * constr_pattern match_pattern -> unit
+
+(* Prints a matching failure message for a rule *)
+val db_matching_failure : debug_info -> unit
+
+(* Prints an evaluation failure message for a rule *)
+val db_eval_failure : debug_info -> string -> unit
+
+(* An exception handler *)
+val explain_logic_error: (exn -> Pp.std_ppcmds) ref
+
+(* Prints a logic failure message for a rule *)
+val db_logic_failure : debug_info -> exn -> unit