1 files changed, 35 insertions, 0 deletions
diff --git a/lib/cMap.mli b/lib/cMap.mli
new file mode 100644
index 000000000..9b7043d9e
--- /dev/null
+++ b/lib/cMap.mli
@@ -0,0 +1,35 @@
+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2012     *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(** {5 Extended version of OCaml's maps} *)
+
+module type OrderedType =
+sig
+  type t
+  val compare : t -> t -> int
+end
+
+module type S = Map.S
+
+module type ExtS =
+sig
+  include Map.S
+  (** The underlying Map library *)
+
+  module Set : Set.S with type elt = key
+  (** Sets used by the domain function *)
+
+  val domain : 'a t -> Set.t
+  (** Recover the set of keys defined in the map. *)
+
+end
+
+module Make(M : Map.OrderedType) : ExtS with
+  type key = M.t
+  and type 'a t = 'a Map.Make(M).t
+  and module Set := Set.Make(M)