Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

58 lines (42 sloc) 1.951 kb
(************************************************************************)
(* 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 *)
(************************************************************************)
(** An imperative implementation of partitions via Union-Find *)
(** Paths are compressed imperatively at each lookup of a
canonical representative. Each union also modifies in-place
the partition structure.
Nota: for the moment we use Pervasive's comparison for
choosing the smallest object as representative. This could
be made more generic.
*)
module type PartitionSig = sig
(** The type of elements in the partition *)
type elt
(** A set structure over elements *)
type set
(** The type of partitions *)
type t
(** Initialise an empty partition *)
val create : unit -> t
(** Add (in place) an element in the partition, or do nothing
if the element is already in the partition. *)
val add : elt -> t -> unit
(** Find the canonical representative of an element.
Raise [not_found] if the element isn't known yet. *)
val find : elt -> t -> elt
(** Merge (in place) the equivalence classes of two elements.
This will add the elements in the partition if necessary. *)
val union : elt -> elt -> t -> unit
(** Merge (in place) the equivalence classes of many elements. *)
val union_set : set -> t -> unit
(** Listing the different components of the partition *)
val partition : t -> set list
end
module Make :
functor (S:Set.S) ->
functor (M:Map.S with type key = S.elt) ->
PartitionSig with type elt = S.elt and type set = S.t
Jump to Line
Something went wrong with that request. Please try again.