X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Flisp%2Fao_lisp_const.lisp;h=9fb7634c5858e1cd7d4d76330b8ab72953ad9da6;hb=6d2f271a45759bd792d299f04a424d3382ef4798;hp=191ef00581ff2b602fa3a295cb1455fb2601a258;hpb=cf5729a0bae51172f12fc9ec4339d4e975a45fcc;p=fw%2Faltos

diff --git a/src/lisp/ao_lisp_const.lisp b/src/lisp/ao_lisp_const.lisp
index 191ef005..9fb7634c 100644
--- a/src/lisp/ao_lisp_const.lisp
+++ b/src/lisp/ao_lisp_const.lisp
@@ -60,10 +60,17 @@
 
 (defun caddr (l) (car (cdr (cdr l))))
 
-(defun nth (list n)
-  (cond ((= n 0) (car list))
-	((nth (cdr list) (1- n)))
-	)
+(define list-tail (lambda (x k)
+		    (if (zero? k)
+			x
+		      (list-tail (cdr x (- k 1)))
+		      )
+		    )
+  )
+
+(define list-ref (lambda (x k)
+		   (car (list-tail x k))
+		   )
   )
 
 					; simple math operators
@@ -152,9 +159,6 @@
 (odd? 3)
 (odd? -1)
 
-(define exact? number?)
-(defun inexact? (x) #f)
-
 					; (if <condition> <if-true>)
 					; (if <condition> <if-true> <if-false)
 
@@ -264,6 +268,7 @@
 
 (let ((x 1)) x)
 
+(define let* let)
 					; boolean operators
 
 (define or (lexpr (l)