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(*
* Option  functions for the option type
* 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 021111307 USA
*)
exception No_value
let may f = function
 None > ()
 Some v > f v
let map f = function
 None > None
 Some v > Some (f v)
let default v = function
 None > v
 Some v > v
let is_some = function
 None > false
 _ > true
let is_none = function
 None > true
 _ > false
let get = function
 None > raise No_value
 Some v > v
let map_default f v = function
 None > v
 Some v2 > f v2
