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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        *)
+(************************************************************************)
+
+(* $Id: symbols.mli,v 1.22.2.1 2004/07/16 19:30:23 herbelin Exp $ *)
+
+(*i*)
+open Util
+open Pp
+open Bignat
+open Names
+open Nametab
+open Libnames
+open Rawterm
+open Topconstr
+open Ppextend
+
+(*i*)
+
+(**********************************************************************)
+(* Scopes *)
+
+(*s A scope is a set of interpreters for symbols + optional
+   interpreter and printers for integers + optional delimiters *)
+
+type level = precedence * tolerability list
+type delimiters = string
+type scope
+type scopes (* = scope_name list*)
+
+val type_scope : scope_name
+val declare_scope : scope_name -> unit
+
+(* Open scope *)
+
+val current_scopes : unit -> scopes
+val open_close_scope : 
+  (* locality *) bool * (* open *) bool * scope_name -> unit
+
+(* Extend a list of scopes *)
+val empty_scope_stack : scopes
+val push_scope : scope_name -> scopes -> scopes
+
+(* Declare delimiters for printing *)
+
+val declare_delimiters : scope_name -> delimiters -> unit
+val find_delimiters_scope : loc -> delimiters -> scope_name
+
+(*s Declare and uses back and forth a numeral interpretation *)
+
+(* A numeral interpreter is the pair of an interpreter for _integer_
+   numbers in terms and an optional interpreter in pattern, if
+   negative numbers are not supported, the interpreter must fail with
+   an appropriate error message *)
+
+type num_interpreter =
+    (loc -> bigint -> rawconstr)
+    * (loc -> bigint -> name -> cases_pattern) option
+
+type num_uninterpreter =
+    rawconstr list * (rawconstr -> bigint option)
+    * (cases_pattern -> bigint option) option
+
+type required_module = global_reference * string list 
+val declare_numeral_interpreter : scope_name -> required_module ->
+  num_interpreter -> num_uninterpreter -> unit
+
+(* Returns the term/cases_pattern bound to a numeral in a given scope context*)
+val interp_numeral : loc -> bigint -> scope_name list -> rawconstr
+val interp_numeral_as_pattern : loc -> bigint -> name -> scope_name list ->
+  cases_pattern
+
+(* Returns the numeral bound to a term/cases_pattern; raises No_match if no *)
+(* such numeral *)
+val uninterp_numeral : rawconstr -> scope_name * bigint
+val uninterp_cases_numeral : cases_pattern -> scope_name * bigint
+
+val availability_of_numeral : scope_name -> scopes -> delimiters option option
+
+(*s Declare and interpret back and forth a notation *)
+
+(* Binds a notation in a given scope to an interpretation *)
+type interp_rule =
+  | NotationRule of scope_name option * notation
+  | SynDefRule of kernel_name
+val declare_notation_interpretation : notation -> scope_name option ->
+      interpretation -> dir_path * string -> bool -> unit
+
+val declare_uninterpretation : interp_rule -> interpretation -> unit
+
+(* Returns the interpretation bound to a notation *)
+val interp_notation : loc -> notation -> scope_name list -> 
+      interpretation * ((dir_path * string) * scope_name option)
+
+(* Returns the possible notations for a given term *)
+val uninterp_notations : rawconstr ->
+      (interp_rule * interpretation * int option) list
+val uninterp_cases_pattern_notations : cases_pattern ->
+      (interp_rule * interpretation * int option) list
+
+(* Test if a notation is available in the scopes *)
+(* context [scopes] if available, the result is not None; the first *)
+(* argument is itself not None if a delimiters is needed; the second *)
+(* argument is a numeral printer if the *)
+val availability_of_notation : scope_name option * notation -> scopes -> 
+  (scope_name option * delimiters option) option
+
+(*s Declare and test the level of a (possibly uninterpreted) notation *)
+
+val declare_notation_level : notation -> level option * level -> unit
+val level_of_notation : notation -> level option * level 
+      (* raise [Not_found] if no level *)
+
+(*s** Miscellaneous *)
+
+(* Checks for already existing notations *)
+val exists_notation_in_scope : scope_name option -> notation ->
+      interpretation -> bool * bool
+
+(* Declares and looks for scopes associated to arguments of a global ref *)
+val declare_arguments_scope: global_reference -> scope_name option list -> unit
+val find_arguments_scope : global_reference -> scope_name option list
+
+val declare_class_scope : scope_name -> Classops.cl_typ -> unit
+val declare_ref_arguments_scope : global_reference -> unit
+
+val compute_arguments_scope : Term.types -> scope_name option list
+
+(* Building notation key *)
+
+type symbol =
+  | Terminal of string
+  | NonTerminal of identifier
+  | SProdList of identifier * symbol list
+  | Break of int
+
+val make_notation_key : symbol list -> notation
+val decompose_notation_key : notation -> symbol list
+
+(* Prints scopes (expect a pure aconstr printer *)
+val pr_scope : (rawconstr -> std_ppcmds) -> scope_name -> std_ppcmds
+val pr_scopes : (rawconstr -> std_ppcmds) -> std_ppcmds
+val locate_notation : (rawconstr -> std_ppcmds) -> notation -> std_ppcmds
+
+val pr_visibility: (rawconstr -> std_ppcmds) -> scope_name option -> std_ppcmds
+
+(**********************************************************************)
+(*s Printing rules for notations *)
+
+(* Declare and look for the printing rule for symbolic notations *)
+type unparsing_rule = unparsing list * precedence
+val declare_notation_printing_rule : notation -> unparsing_rule -> unit
+val find_notation_printing_rule : notation -> unparsing_rule
+
+(**********************************************************************)
+(* Rem: printing rules for numerals are trivial *)