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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) *)
(************************************************************************)
(** A native integer module with usual utility functions. *)
type t = int
external equal : t -> t -> bool = "%eq"
external compare : t -> t -> int = "caml_int_compare"
val hash : t -> int
module Set : Set.S with type elt = t
module Map : CMap.ExtS with type key = t and module Set := Set
module List : sig
val mem : int -> int list -> bool
val assoc : int -> (int * 'a) list -> 'a
val mem_assoc : int -> (int * 'a) list -> bool
val remove_assoc : int -> (int * 'a) list -> (int * 'a) list
end
module PArray :
sig
type 'a t
(** Persistent, auto-resizable arrays. The [get] and [set] functions never
fail whenever the index is between [0] and [Sys.max_array_length - 1]. *)
val empty : int -> 'a t
(** The empty array, with a given starting size. *)
val get : 'a t -> int -> 'a option
(** Get a value at the given index. Returns [None] if undefined. *)
val set : 'a t -> int -> 'a option -> 'a t
(** Set/unset a value at the given index. *)
end
module PMap :
sig
type key = int
type 'a t
val empty : 'a t
val is_empty : 'a t -> bool
val mem : key -> 'a t -> bool
val add : key -> 'a -> 'a t -> 'a t
val singleton : key -> 'a -> 'a t
val remove : key -> 'a t -> 'a t
(* val merge : (key -> 'a option -> 'b option -> 'c option) -> 'a t -> 'b t -> 'c t *)
(* val compare : ('a -> 'a -> int) -> 'a t -> 'a t -> int *)
(* val equal : ('a -> 'a -> bool) -> 'a t -> 'a t -> bool *)
val iter : (key -> 'a -> unit) -> 'a t -> unit
val fold : (key -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
val for_all : (key -> 'a -> bool) -> 'a t -> bool
val exists : (key -> 'a -> bool) -> 'a t -> bool
(* val filter : (key -> 'a -> bool) -> 'a t -> 'a t *)
(* val partition : (key -> 'a -> bool) -> 'a t -> 'a t * 'a t *)
(* val cardinal : 'a t -> int *)
(* val bindings : 'a t -> (key * 'a) list *)
(* val min_binding : 'a t -> key * 'a *)
(* val max_binding : 'a t -> key * 'a *)
(* val choose : 'a t -> key * 'a *)
(* val split : key -> 'a t -> 'a t * 'a option * 'a t *)
val find : key -> 'a t -> 'a
(* val map : ('a -> 'b) -> 'a t -> 'b t *)
(* val mapi : (key -> 'a -> 'b) -> 'a t -> 'b t *)
val domain : 'a t -> Set.t
val cast : 'a t -> 'a Map.t
end
(** This is a (partial) implementation of a [Map] interface on integers, except
that it internally uses persistent arrays. This ensures O(1) accesses in
non-backtracking cases. It is thus better suited for zero-starting,
contiguous keys, or otherwise a lot of space will be empty. To keep track of
the present keys, a binary tree is also used, so that adding a key is
still logarithmic. It is therefore essential that most of the operations
are accesses and not add/removes. *)
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