caml_basic.ml

(* Copyright (C) 2015-2016 Bloomberg Finance L.P.
 * 
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * In addition to the permissions granted to you by the LGPL, you may combine
 * or link a "work that uses the Library" with a publicly distributed version
 * of this file to produce a combined library or application, then distribute
 * that combined work under the terms of your choosing, with no requirement
 * to comply with the obligations normally placed on you by section 4 of the
 * LGPL version 3 (or the corresponding section of a later version of the LGPL
 * should you choose to use a later version).
 *
 * This program 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 program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *)



(** *)

let none = None

let some x = Some x 

let is_none x : Js.boolean = 
  match x with 
  | None -> Js.true_ 
  | _ -> Js.false_ 

let to_def x : _ Js_undefined.t = 
  match  x with 
  | None -> Js_undefined.empty
  | Some x -> Js_undefined.return x 

(* In the next version of std, we already provide 
   [List.cons]
*)
let cons x y = x :: y 

let is_list_empty x : Js.boolean =  
  match x with 
  | [] -> Js.true_
  | _ -> Js.false_