(*****************************************************************************)
(*                                                                           *)
(* Open Source License                                                       *)
  Copyright ( c ) 2021      Marigold <  >                    
(*                                                                           *)
(* Permission is hereby granted, free of charge, to any person obtaining a   *)
(* copy of this software and associated documentation files (the "Software"),*)
  to deal in the Software without restriction , including without limitation
(* the rights to use, copy, modify, merge, publish, distribute, sublicense,  *)
  and/or sell copies of the Software , and to permit persons to whom the     
(* Software is furnished to do so, subject to the following conditions:      *)
(*                                                                           *)
(* The above copyright notice and this permission notice shall be included   *)
(* in all copies or substantial portions of the Software.                    *)
(*                                                                           *)
  THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   *)
(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
  LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING   
(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       *)
(* DEALINGS IN THE SOFTWARE.                                                 *)
(*                                                                           *)
(*****************************************************************************)

type boolean = True | False

let negb (b : boolean) : boolean = match b with True -> False | False -> True

let andb (b1 : boolean) (b2 : boolean) : boolean =
  match b1 with True -> b2 | _ -> False

let orb (b1 : boolean) (b2 : boolean) : boolean =
  match b1 with True -> True | _ -> b2
***************************************************************************
                                                                           
 Open Source License                                                       
                                                                           
 Permission is hereby granted, free of charge, to any person obtaining a   
 copy of this software and associated documentation files (the "Software"),
 the rights to use, copy, modify, merge, publish, distribute, sublicense,  
 Software is furnished to do so, subject to the following conditions:      
                                                                           
 The above copyright notice and this permission notice shall be included   
 in all copies or substantial portions of the Software.                    
                                                                           
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL   
 THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER       
 DEALINGS IN THE SOFTWARE.                                                 
                                                                           
***************************************************************************
  Copyright ( c ) 2021      Marigold <  >                    
  to deal in the Software without restriction , including without limitation
  and/or sell copies of the Software , and to permit persons to whom the     
  THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
  LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE , ARISING   

type boolean = True | False

let negb (b : boolean) : boolean = match b with True -> False | False -> True

let andb (b1 : boolean) (b2 : boolean) : boolean =
  match b1 with True -> b2 | _ -> False

let orb (b1 : boolean) (b2 : boolean) : boolean =
  match b1 with True -> True | _ -> b2