Two Definitions of IF Function.

;---------------------------------------------------------------
; Last few days I played with definition of IF as function.
; It is typically not possible in Lisp family, but Newlisp
; can do that. I present here two definitions of IF that are
; specific not only because of that, but also because the
; definitions do not use any equivalent built in (like if, cond,
; case) and also, definitions do not use any variables.
;---------------------------------------------------------------

(set 'IF (lambda()
           (eval
             ((args)
               (- 5 (length
                       (string
                          (true?
                             (eval (first (args)))))))))))
(let ((x 2)(y 3))
     (IF '(< x y)
         '(println  x " is less than " y)
         '(println  x " is not less than " y))
                
     (IF '(> x y)
         '(println x " is greater than " y)
         '(println x " is not greater than " y)))

;---------------------------------------------------------------

(set 'IF (lambda()
           (eval
             ((args)
               (find (true? (eval (first (args))))
                     '(* true nil))))))

(let ((x 2)(y 3))
     (IF '(< x y)
         '(println  x " is less than " y)
         '(println  x " is not less than " y))
                
     (IF '(> x y)
         '(println x " is greater than " y)
         '(println x " is not greater than " y)))

(exit)