car and cdr variants: order definitions properly, remove duplicates and add missing...

diff --git a/src/list.lisp b/src/list.lisp
index d515e52..99e6e7a 100644 (file)
--- a/src/list.lisp
+++ b/src/list.lisp
@@ -72,17 +72,16 @@
 (defun cadr (x) (car (cdr x)))
 (defun cdar (x) (cdr (car x)))
 (defun cddr (x) (cdr (cdr x)))
-(defun cadar (x) (car (cdr (car x))))
-(defun caddr (x) (car (cdr (cdr x))))
-(defun cdddr (x) (cdr (cdr (cdr x))))
-(defun cadddr (x) (car (cdr (cdr (cdr x)))))
-
-(defun cadar  (x) (car (cdar  x)))
-(defun caaar  (x) (car (caar  x)))
-(defun caadr  (x) (car (cadr  x)))
-(defun cdaar  (x) (cdr (caar  x)))
-(defun cdadr  (x) (cdr (cadr  x)))
-(defun cddar  (x) (cdr (cdar  x)))
+
+(defun caaar (x) (car (caar x)))
+(defun caadr (x) (car (cadr x)))
+(defun cadar (x) (car (cdar x)))
+(defun caddr (x) (car (cddr x)))
+(defun cdaar (x) (cdr (caar x)))
+(defun cdadr (x) (cdr (cadr x)))
+(defun cddar (x) (cdr (cdar x)))
+(defun cdddr (x) (cdr (cddr x)))
+
 (defun caaaar (x) (car (caaar x)))
 (defun caaadr (x) (car (caadr x)))
 (defun caadar (x) (car (cadar x)))
@@ -90,6 +89,7 @@
 (defun cadaar (x) (car (cdaar x)))
 (defun cadadr (x) (car (cdadr x)))
 (defun caddar (x) (car (cddar x)))
+(defun cadddr (x) (car (cdddr x)))
 (defun cdaaar (x) (cdr (caaar x)))
 (defun cdaadr (x) (cdr (caadr x)))
 (defun cdadar (x) (cdr (cadar x)))