| swissChili | f68671f | 2021-07-05 14:14:44 -0700 | [diff] [blame^] | 1 | ;;;; std.lisp -- Lisp standard library |
| 2 | |
| 3 | (defun caar (val) |
| 4 | (car (car val))) |
| 5 | |
| 6 | (defun cadr (val) |
| 7 | (car (cdr val))) |
| 8 | |
| 9 | (defun caddr (val) |
| 10 | (car (cdr (cdr val)))) |
| 11 | |
| 12 | (defun cadar (val) |
| 13 | (car (cdr (car val)))) |
| 14 | |
| 15 | (defun caddar (val) |
| 16 | (car (cdr (cdr (car val))))) |
| 17 | |
| 18 | ;; Instead of a function this is a macro for a slight performance increase |
| 19 | (defmacro not (val) |
| 20 | (nilp val)) |
| 21 | |
| 22 | ;; TODO: make tail recursive (for this `flet` would be nice) |
| 23 | (defun length (list) |
| 24 | (if (nilp list) |
| 25 | 0 |
| 26 | (+ 1 (length (cdr list))))) |