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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 *)
(************************************************************************)
(* $Id$ *)
open Util
type ('a,'b) t = ('a,'b list) Gmap.t
let empty = Gmap.empty
let mem = Gmap.mem
let iter = Gmap.iter
let map = Gmap.map
let fold = Gmap.fold
let add x y m =
try
let l = Gmap.find x m in
Gmap.add x (y::list_except y l) m
with Not_found ->
Gmap.add x [y] m
let find x m =
try Gmap.find x m with Not_found -> []
let remove x y m =
let l = Gmap.find x m in
Gmap.add x (if List.mem y l then list_subtract l [y] else l) m
|
