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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: egrammar.mli 10122 2007-09-15 10:35:59Z letouzey $ i*)

(*i*)
open Util
open Topconstr
open Pcoq
open Extend
open Vernacexpr
open Ppextend
open Rawterm
open Mod_subst
(*i*)

(** Mapping of grammar productions to camlp4 actions
    Used for Coq-level Notation and Tactic Notation, 
    and for ML-level tactic and vernac extensions
 *)

type prod_item =
  | Term of Token.pattern
  | NonTerm of constr_production_entry * 
      (Names.identifier * constr_production_entry) option

type notation_grammar = 
    int * Gramext.g_assoc option * notation * prod_item list

type all_grammar_command =
  | Notation of (precedence * tolerability list) * notation_grammar
  | TacticGrammar of
      (string * int * grammar_production list * 
        (Names.dir_path * Tacexpr.glob_tactic_expr))

val extend_grammar : all_grammar_command -> unit

(* Add grammar rules for tactics *)

type grammar_tactic_production =
  | TacTerm of string
  | TacNonTerm of
      loc * (Compat.token Gramext.g_symbol * Genarg.argument_type) * string option

val extend_tactic_grammar :
  string -> grammar_tactic_production list list -> unit

val extend_vernac_command_grammar :
  string -> grammar_tactic_production list list -> unit
(*
val get_extend_tactic_grammars :
 unit -> (string * grammar_tactic_production list list) list
*)
val get_extend_vernac_grammars :
 unit -> (string * grammar_tactic_production list list) list
(*
val reset_extend_grammars_v8 : unit -> unit
*)
val interp_entry_name : int -> string -> entry_type * Compat.token Gramext.g_symbol

val recover_notation_grammar :
  notation -> (precedence * tolerability list) -> notation_grammar