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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \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 CSig.MapS
(** The underlying Map library *)
module Set : CSig.SetS with type elt = key
(** Sets used by the domain function *)
val update : key -> 'a -> 'a t -> 'a t
(** Same as [add], but expects the key to be present, and thus faster.
@raise Not_found when the key is unbound in the map. *)
val modify : key -> (key -> 'a -> 'a) -> 'a t -> 'a t
(** Apply the given function to the binding of the given key.
@raise Not_found when the key is unbound in the map. *)
val domain : 'a t -> Set.t
(** Recover the set of keys defined in the map. *)
val bind : (key -> 'a) -> Set.t -> 'a t
(** [bind f s] transform the set [x1; ...; xn] into [x1 := f x1; ...;
xn := f xn]. *)
val fold_left : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
(** Alias for {!fold}, to easily track where we depend on fold order. *)
val fold_right : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
(** Folding keys in decreasing order. *)
val smartmap : ('a -> 'a) -> 'a t -> 'a t
(** As [map] but tries to preserve sharing. *)
val smartmapi : (key -> 'a -> 'a) -> 'a t -> 'a t
(** As [mapi] but tries to preserve sharing. *)
module Unsafe :
sig
val map : (key -> 'a -> key * 'b) -> 'a t -> 'b t
(** As the usual [map], but also allows modifying the key of a binding.
It is required that the mapping function [f] preserves key equality,
i.e.: for all (k : key) (x : 'a), compare (fst (f k x)) k = 0. *)
end
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)
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