src/state.ml

   1 (***********************************************************************)
   2 (*                                                                     *)
   3 (*                               TAToo                                 *)
   4 (*                                                                     *)
   5 (*                     Kim Nguyen, LRI UMR8623                         *)
   6 (*                   Université Paris-Sud & CNRS                       *)
   7 (*                                                                     *)
   8 (*  Copyright 2010-2012 Université Paris-Sud and Centre National de la *)
   9 (*  Recherche Scientifique. All rights reserved.  This file is         *)
  10 (*  distributed under the terms of the GNU Lesser General Public       *)
  11 (*  License, with the special exception on linking described in file   *)
  12 (*  ../LICENSE.                                                        *)
  13 (*                                                                     *)
  14 (***********************************************************************)
  15
  16 open Format
  17
  18 type t = int
  19 let make =
  20   let id = ref ~-1 in
  21     fun () -> incr id; !id
  22
  23 let compare = (-)
  24
  25 let equal = (==)
  26
  27 external hash : t -> int =  "%identity"
  28
  29 let print fmt x = fprintf fmt "q%a" Pretty.pp_subscript x
  30
  31 let dump fmt x = print fmt x
  32
  33 let check x =
  34   if x < 0 then failwith (Printf.sprintf "State: Assertion %i < 0 failed" x)
  35
  36 let dummy = max_int