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(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010     *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

(*i $Id$ i*)

(*i*)
open Names
open Term
(*i*)

(*s Signatures of ordered named declarations *)

type named_context = named_declaration list
type section_context = named_context

val empty_named_context : named_context
val add_named_decl : named_declaration -> named_context -> named_context
val vars_of_named_context : named_context -> identifier list

val lookup_named : identifier -> named_context -> named_declaration

(* number of declarations *)
val named_context_length : named_context -> int

(*s Recurrence on [named_context]: older declarations processed first *)
val fold_named_context :
  (named_declaration -> 'a -> 'a) -> named_context -> init:'a -> 'a
(* newer declarations first *)
val fold_named_context_reverse :
  ('a -> named_declaration -> 'a) -> init:'a -> named_context -> 'a

(*s Section-related auxiliary functions *)
val instance_from_named_context : named_context -> constr array

(*s Signatures of ordered optionally named variables, intended to be
   accessed by de Bruijn indices *)

val push_named_to_rel_context : named_context -> rel_context -> rel_context

(*s Recurrence on [rel_context]: older declarations processed first *)
val fold_rel_context :
  (rel_declaration -> 'a -> 'a) -> rel_context -> init:'a -> 'a
(* newer declarations first *)
val fold_rel_context_reverse :
  ('a -> rel_declaration -> 'a) -> init:'a -> rel_context -> 'a

(*s Map function of [rel_context] *)
val map_rel_context : (constr -> constr) -> rel_context -> rel_context

(*s Map function of [named_context] *)
val map_named_context : (constr -> constr) -> named_context -> named_context

(*s Map function of [rel_context] *)
val iter_rel_context : (constr -> unit) -> rel_context -> unit

(*s Map function of [named_context] *)
val iter_named_context : (constr -> unit) -> named_context -> unit