38 lines
1.5 KiB
OCaml
38 lines
1.5 KiB
OCaml
(***********************************************************************)
|
|
(* *)
|
|
(* OCaml *)
|
|
(* *)
|
|
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
|
|
(* *)
|
|
(* Copyright 1996 Institut National de Recherche en Informatique et *)
|
|
(* en Automatique. All rights reserved. This file is distributed *)
|
|
(* under the terms of the Q Public License version 1.0. *)
|
|
(* *)
|
|
(***********************************************************************)
|
|
|
|
module IntSet = Set.Make(struct type t = int let compare x y = x-y end)
|
|
|
|
let even = List.fold_right IntSet.add [0; -2; 2; 4; 6; -10] IntSet.empty
|
|
|
|
let odd = List.fold_right IntSet.add [9; -7; 5; 1; -3] IntSet.empty
|
|
|
|
let _ =
|
|
for i = -10 to 10 do
|
|
Printf.printf "%d %B %B\n" i (IntSet.mem i even) (IntSet.mem i odd)
|
|
done
|
|
|
|
module PowerSet(BaseSet: Set.S)
|
|
(SetOrd: functor(S: Set.S) -> Set.OrderedType) =
|
|
Set.Make(SetOrd(BaseSet))
|
|
|
|
module IntSetSet = PowerSet(IntSet)(functor (S: Set.S) -> S)
|
|
|
|
let setofset = List.fold_right IntSetSet.add [even; odd] IntSetSet.empty
|
|
|
|
let _ =
|
|
List.iter
|
|
(fun s -> Printf.printf "%B\n" (IntSetSet.mem s setofset))
|
|
[IntSet.empty; even; odd; IntSet.union even odd]
|
|
|
|
let _ = exit 0
|