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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 *)
(************************************************************************)
open Xml_datatype
type state_id = int
let initial_state_id = 1
let dummy_state_id = 0
let fresh_state_id, in_range =
let cur = ref initial_state_id in
(fun () -> incr cur; !cur), (fun id -> id >= 0 && id <= !cur)
let string_of_state_id = string_of_int
let state_id_of_int id = assert(in_range id); id
let int_of_state_id id = id
let newer_than id1 id2 = id1 > id2
let to_state_id = function
| Element ("state_id",["val",i],[]) ->
let id = int_of_string i in
(* Coqide too to parse ids too, but cannot check if they are valid.
* Hence we check for validity only if we are an ide slave. *)
if !Flags.ide_slave then assert(in_range id);
id
| _ -> raise (Invalid_argument "to_state_id")
let of_state_id i = Element ("state_id",["val",string_of_int i],[])
let state_id_info : (state_id * state_id) Exninfo.t = Exninfo.make ()
let add_state_id exn ?(valid = initial_state_id) id =
Exninfo.add exn state_id_info (valid, id)
let get_state_id exn = Exninfo.get exn state_id_info
module StateidOrderedType = struct type t = state_id let compare = compare end
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