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* ExtHashtbl - extra functions over hashtables.
* Copyright (C) 2003 Nicolas Cannasse
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version,
* with the special exception on linking described in file LICENSE.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
(** Extra functions over hashtables. *)
module Hashtbl :
(** The wrapper module *)
sig
type ('a,'b) t = ('a,'b) Hashtbl.t
(** The type of a hashtable. *)
(** {6 New Functions} *)
val exists : ('a,'b) t -> 'a -> bool
(** [exists h k] returns true is at least one item with key [k] is
found in the hashtable. *)
val keys : ('a,'b) t -> 'a Enum.t
(** Return an enumeration of all the keys of a hashtable.
If the key is in the Hashtable multiple times, all occurrences
will be returned. *)
val values : ('a,'b) t -> 'b Enum.t
(** Return an enumeration of all the values of a hashtable. *)
val enum : ('a, 'b) t -> ('a * 'b) Enum.t
(** Return an enumeration of (key,value) pairs of a hashtable. *)
val of_enum : ('a * 'b) Enum.t -> ('a, 'b) t
(** Create a hashtable from a (key,value) enumeration. *)
val find_default : ('a,'b) t -> 'a -> 'b -> 'b
(** Find a binding for the key, and return a default
value if not found *)
val find_option : ('a,'b) Hashtbl.t -> 'a -> 'b option
(** Find a binding for the key, or return [None] if no
value is found *)
val remove_all : ('a,'b) t -> 'a -> unit
(** Remove all bindings for the given key *)
val map : ('b -> 'c) -> ('a,'b) t -> ('a,'c) t
(** [map f x] creates a new hashtable with the same
keys as [x], but with the function [f] applied to
all the values *)
val length : ('a,'b) t -> int
(** Return the number of elements inserted into the Hashtbl
(including duplicates) *)
(** {6 Older Functions} *)
(** Please refer to the Ocaml Manual for documentation of these
functions. (note : functor support removed to avoid code
duplication). *)
val create : int -> ('a, 'b) t
val clear : ('a, 'b) t -> unit
val add : ('a, 'b) t -> 'a -> 'b -> unit
val copy : ('a, 'b) t -> ('a, 'b) t
val find : ('a, 'b) t -> 'a -> 'b
val find_all : ('a, 'b) t -> 'a -> 'b list
val mem : ('a, 'b) t -> 'a -> bool
val remove : ('a, 'b) t -> 'a -> unit
val replace : ('a, 'b) t -> 'a -> 'b -> unit
val iter : ('a -> 'b -> unit) -> ('a, 'b) t -> unit
val fold : ('a -> 'b -> 'c -> 'c) -> ('a, 'b) t -> 'c -> 'c
val hash : 'a -> int
end
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