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add CCHashtbl.Poly and fix issue in Containers (close #46)
This commit is contained in:
Simon Cruanes
parent
edc488b909
commit
8ddacbb028
3 changed files with 185 additions and 175 deletions
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@ -10,37 +10,38 @@ type 'a printer = Format.formatter -> 'a -> unit
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(** {2 Polymorphic tables} *)
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let get tbl x =
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module Poly = struct
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let get tbl x =
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try Some (Hashtbl.find tbl x)
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with Not_found -> None
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let get_or tbl x ~default =
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let get_or tbl x ~default =
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try Hashtbl.find tbl x
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with Not_found -> default
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(*$=
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(*$=
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"c" (let tbl = of_list [1,"a"; 2,"b"] in get_or tbl 3 ~default:"c")
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"b" (let tbl = of_list [1,"a"; 2,"b"] in get_or tbl 2 ~default:"c")
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*)
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*)
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let keys tbl k = Hashtbl.iter (fun key _ -> k key) tbl
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let keys tbl k = Hashtbl.iter (fun key _ -> k key) tbl
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let values tbl k = Hashtbl.iter (fun _ v -> k v) tbl
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let values tbl k = Hashtbl.iter (fun _ v -> k v) tbl
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let keys_list tbl = Hashtbl.fold (fun k _ a -> k::a) tbl []
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let values_list tbl = Hashtbl.fold (fun _ v a -> v::a) tbl []
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let keys_list tbl = Hashtbl.fold (fun k _ a -> k::a) tbl []
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let values_list tbl = Hashtbl.fold (fun _ v a -> v::a) tbl []
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let add_list tbl k v =
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let add_list tbl k v =
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let l = try Hashtbl.find tbl k with Not_found -> [] in
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Hashtbl.replace tbl k (v::l)
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let incr ?(by=1) tbl x =
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let incr ?(by=1) tbl x =
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let n = get_or tbl x ~default:0 in
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if n+by <= 0
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then Hashtbl.remove tbl x
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else Hashtbl.replace tbl x (n+by)
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let decr ?(by=1) tbl x =
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let decr ?(by=1) tbl x =
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try
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let n = Hashtbl.find tbl x in
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if n-by <= 0
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@ -48,43 +49,43 @@ let decr ?(by=1) tbl x =
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else Hashtbl.replace tbl x (n-by)
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with Not_found -> ()
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let map_list f h =
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let map_list f h =
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Hashtbl.fold
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(fun x y acc -> f x y :: acc)
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h []
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(*$T
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(*$T
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of_list [1,"a"; 2,"b"] |> map_list (fun x y -> string_of_int x ^ y) \
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|> List.sort Pervasives.compare = ["1a"; "2b"]
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*)
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*)
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let to_seq tbl k = Hashtbl.iter (fun key v -> k (key,v)) tbl
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let to_seq tbl k = Hashtbl.iter (fun key v -> k (key,v)) tbl
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let add_seq tbl seq = seq (fun (k,v) -> Hashtbl.add tbl k v)
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let add_seq tbl seq = seq (fun (k,v) -> Hashtbl.add tbl k v)
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let of_seq seq =
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let of_seq seq =
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let tbl = Hashtbl.create 32 in
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add_seq tbl seq;
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tbl
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let add_seq_count tbl seq = seq (fun k -> incr tbl k)
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let add_seq_count tbl seq = seq (fun k -> incr tbl k)
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let of_seq_count seq =
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let of_seq_count seq =
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let tbl = Hashtbl.create 32 in
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add_seq_count tbl seq;
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tbl
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let to_list tbl =
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let to_list tbl =
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Hashtbl.fold
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(fun k v l -> (k,v) :: l)
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tbl []
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let of_list l =
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let of_list l =
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let tbl = Hashtbl.create 32 in
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List.iter (fun (k,v) -> Hashtbl.add tbl k v) l;
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tbl
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let update tbl ~f ~k =
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let update tbl ~f ~k =
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let v = get tbl k in
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match v, f k v with
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| None, None -> ()
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@ -92,7 +93,7 @@ let update tbl ~f ~k =
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| Some _, Some v' -> Hashtbl.replace tbl k v'
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| Some _, None -> Hashtbl.remove tbl k
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(*$R
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(*$R
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let tbl = Hashtbl.create 32 in
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update tbl ~k:1 ~f:(fun _ _ -> Some "1");
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assert_equal (Some "1") (get tbl 1);
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@ -101,16 +102,16 @@ let update tbl ~f ~k =
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assert_equal 2 (Hashtbl.length tbl);
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update tbl ~k:1 ~f:(fun _ _ -> None);
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assert_equal None (get tbl 1);
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*)
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*)
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let get_or_add tbl ~f ~k =
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let get_or_add tbl ~f ~k =
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try Hashtbl.find tbl k
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with Not_found ->
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let v = f k in
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Hashtbl.add tbl k v;
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v
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(*$R
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(*$R
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let tbl = Hashtbl.create 32 in
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let v1 = get_or_add tbl ~k:1 ~f:(fun _ -> "1") in
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assert_equal "1" v1;
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@ -121,9 +122,9 @@ let get_or_add tbl ~f ~k =
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assert_equal "2" (get_or_add tbl ~k:2 ~f:(fun _ -> assert false));
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assert_equal 2 (Hashtbl.length tbl);
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()
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*)
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*)
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let print pp_k pp_v fmt m =
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let print pp_k pp_v fmt m =
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Format.fprintf fmt "@[<hov2>tbl {@,";
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let first = ref true in
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Hashtbl.iter
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@ -135,6 +136,9 @@ let print pp_k pp_v fmt m =
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Format.pp_print_cut fmt ()
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) m;
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Format.fprintf fmt "}@]"
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end
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include Poly
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(** {2 Functor} *)
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@ -12,96 +12,102 @@ type 'a printer = Format.formatter -> 'a -> unit
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(** {2 Polymorphic tables} *)
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val get : ('a,'b) Hashtbl.t -> 'a -> 'b option
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(** Safe version of {!Hashtbl.find} *)
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(** This sub-module contains the extension of the standard polymorphic hashtbl. *)
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val get_or : ('a,'b) Hashtbl.t -> 'a -> default:'b -> 'b
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(** [get_or tbl k ~default] returns the value associated to [k] if present,
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module Poly : sig
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val get : ('a,'b) Hashtbl.t -> 'a -> 'b option
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(** Safe version of {!Hashtbl.find} *)
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val get_or : ('a,'b) Hashtbl.t -> 'a -> default:'b -> 'b
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(** [get_or tbl k ~default] returns the value associated to [k] if present,
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and returns [default] otherwise (if [k] doesn't belong in [tbl])
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@since 0.16 *)
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val keys : ('a,'b) Hashtbl.t -> 'a sequence
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(** Iterate on keys (similar order as {!Hashtbl.iter}) *)
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val keys : ('a,'b) Hashtbl.t -> 'a sequence
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(** Iterate on keys (similar order as {!Hashtbl.iter}) *)
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val values : ('a,'b) Hashtbl.t -> 'b sequence
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(** Iterate on values in the table *)
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val values : ('a,'b) Hashtbl.t -> 'b sequence
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(** Iterate on values in the table *)
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val keys_list : ('a, 'b) Hashtbl.t -> 'a list
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(** [keys_list t] is the list of keys in [t].
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val keys_list : ('a, 'b) Hashtbl.t -> 'a list
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(** [keys_list t] is the list of keys in [t].
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@since 0.8 *)
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val values_list : ('a, 'b) Hashtbl.t -> 'b list
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(** [values_list t] is the list of values in [t].
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val values_list : ('a, 'b) Hashtbl.t -> 'b list
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(** [values_list t] is the list of values in [t].
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@since 0.8 *)
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val map_list : ('a -> 'b -> 'c) -> ('a, 'b) Hashtbl.t -> 'c list
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(** Map on a hashtable's items, collect into a list *)
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val map_list : ('a -> 'b -> 'c) -> ('a, 'b) Hashtbl.t -> 'c list
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(** Map on a hashtable's items, collect into a list *)
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val incr : ?by:int -> ('a, int) Hashtbl.t -> 'a -> unit
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(** [incr ?by tbl x] increments or initializes the counter associated with [x].
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val incr : ?by:int -> ('a, int) Hashtbl.t -> 'a -> unit
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(** [incr ?by tbl x] increments or initializes the counter associated with [x].
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If [get tbl x = None], then after update, [get tbl x = Some 1];
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otherwise, if [get tbl x = Some n], now [get tbl x = Some (n+1)].
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@param by if specified, the int value is incremented by [by] rather than 1
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@since 0.16 *)
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val decr : ?by:int -> ('a, int) Hashtbl.t -> 'a -> unit
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(** Same as {!incr} but substract 1 (or the value of [by]).
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val decr : ?by:int -> ('a, int) Hashtbl.t -> 'a -> unit
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(** Same as {!incr} but substract 1 (or the value of [by]).
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If the value reaches 0, the key is removed from the table.
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This does nothing if the key is not already present in the table.
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@since 0.16 *)
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val to_seq : ('a,'b) Hashtbl.t -> ('a * 'b) sequence
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(** Iterate on bindings in the table *)
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val to_seq : ('a,'b) Hashtbl.t -> ('a * 'b) sequence
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(** Iterate on bindings in the table *)
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val add_list : ('a, 'b list) Hashtbl.t -> 'a -> 'b -> unit
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(** [add_list tbl x y] adds [y] to the list [x] is bound to. If [x] is
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val add_list : ('a, 'b list) Hashtbl.t -> 'a -> 'b -> unit
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(** [add_list tbl x y] adds [y] to the list [x] is bound to. If [x] is
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not bound, it becomes bound to [[y]].
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@since 0.16 *)
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val add_seq : ('a,'b) Hashtbl.t -> ('a * 'b) sequence -> unit
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(** Add the corresponding pairs to the table, using {!Hashtbl.add}.
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val add_seq : ('a,'b) Hashtbl.t -> ('a * 'b) sequence -> unit
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(** Add the corresponding pairs to the table, using {!Hashtbl.add}.
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@since 0.16 *)
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val of_seq : ('a * 'b) sequence -> ('a,'b) Hashtbl.t
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(** From the given bindings, added in order *)
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val of_seq : ('a * 'b) sequence -> ('a,'b) Hashtbl.t
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(** From the given bindings, added in order *)
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val add_seq_count : ('a, int) Hashtbl.t -> 'a sequence -> unit
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(** [add_seq_count tbl seq] increments the count of each element of [seq]
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val add_seq_count : ('a, int) Hashtbl.t -> 'a sequence -> unit
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(** [add_seq_count tbl seq] increments the count of each element of [seq]
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by calling {!incr}. This is useful for counting how many times each
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element of [seq] occurs.
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@since 0.16 *)
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val of_seq_count : 'a sequence -> ('a, int) Hashtbl.t
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(** Similar to {!add_seq_count}, but allocates a new table and returns it
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val of_seq_count : 'a sequence -> ('a, int) Hashtbl.t
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(** Similar to {!add_seq_count}, but allocates a new table and returns it
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@since 0.16 *)
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val to_list : ('a,'b) Hashtbl.t -> ('a * 'b) list
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(** List of bindings (order unspecified) *)
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val to_list : ('a,'b) Hashtbl.t -> ('a * 'b) list
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(** List of bindings (order unspecified) *)
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val of_list : ('a * 'b) list -> ('a,'b) Hashtbl.t
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(** Build a table from the given list of bindings [k_i -> v_i],
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val of_list : ('a * 'b) list -> ('a,'b) Hashtbl.t
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(** Build a table from the given list of bindings [k_i -> v_i],
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added in order using {!add}. If a key occurs several times,
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it will be added several times, and the visible binding
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will be the last one. *)
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val update : ('a, 'b) Hashtbl.t -> f:('a -> 'b option -> 'b option) -> k:'a -> unit
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(** [update tbl ~f ~k] updates key [k] by calling [f k (Some v)] if
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val update : ('a, 'b) Hashtbl.t -> f:('a -> 'b option -> 'b option) -> k:'a -> unit
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(** [update tbl ~f ~k] updates key [k] by calling [f k (Some v)] if
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[k] was mapped to [v], or [f k None] otherwise; if the call
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returns [None] then [k] is removed/stays removed, if the call
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returns [Some v'] then the binding [k -> v'] is inserted
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using {!Hashtbl.replace}
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@since 0.14 *)
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val get_or_add : ('a, 'b) Hashtbl.t -> f:('a -> 'b) -> k:'a -> 'b
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(** [get_or_add tbl ~k ~f] finds and returns the binding of [k]
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val get_or_add : ('a, 'b) Hashtbl.t -> f:('a -> 'b) -> k:'a -> 'b
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(** [get_or_add tbl ~k ~f] finds and returns the binding of [k]
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in [tbl], if it exists. If it does not exist, then [f k]
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is called to obtain a new binding [v]; [k -> v] is added
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to [tbl] and [v] is returned.
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@since NEXT_RELEASE *)
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val print : 'a printer -> 'b printer -> ('a, 'b) Hashtbl.t printer
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(** Printer for table
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val print : 'a printer -> 'b printer -> ('a, 'b) Hashtbl.t printer
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(** Printer for table
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@since 0.13 *)
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end
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include module type of Poly
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(** {2 Functor} *)
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@ -44,7 +44,7 @@ module Hashtbl = struct
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and module Make = Hashtbl.Make
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and type ('a,'b) t = ('a,'b) Hashtbl.t
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)
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(* still unable to include CCHashtbl itself, for the polymorphic functions *)
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include CCHashtbl.Poly
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module type S' = CCHashtbl.S
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module Make' = CCHashtbl.Make
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end
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