(***********************************************************************)
(*                                                                     *)
(*                                 GALAX                               *)
(*                              XQuery Engine                          *)
(*                                                                     *)
(*  Copyright 2001-2007.                                               *)
(*  Distributed only by permission.                                    *)
(*                                                                     *)
(***********************************************************************)

(* $Id: ast_walker_annotate_context.mli,v 1.2 2007/02/01 22:08:45 simeon Exp $ *)

(* Module: Ast_walker_annotate_context
   Description:
     Context for the annotation walker. An annotation_context is
     polymorphic because a particular annotator module may
     require/construct an annotation-specific context.
*)

open Xquery_core_ast

type 'a annotation_context

type 'a annotation_update_fn = 'a -> acexpr -> unit

val build_annotation_context : 'a -> 'a annotation_update_fn -> 'a annotation_context

val get_annotation_context   : 'a annotation_context -> 'a
val get_annotation_update_fn : 'a annotation_context -> 'a annotation_update_fn