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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
module type HashedType =
sig
type t
val compare : t -> t -> int
(** Total ordering *)
val hash : t -> int
(** Hashing function compatible with [compare], i.e. [compare x y = 0] implies
[hash x = hash y]. *)
end
(** Hash maps are maps that take advantage of having a hash on keys. This is
essentially a hash table, except that it uses purely functional maps instead
of arrays.
CAVEAT: order-related functions like [fold] or [iter] do not respect the
provided order anymore! It's your duty to do something sensible to prevent
this if you need it. In particular, [min_binding] and [max_binding] are now
made meaningless.
*)
module Make(M : HashedType) : CMap.ExtS with type key = M.t
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