altos/lisp: Fix some scheme compat issues

[fw/altos] / src / lisp / ao_lisp_const.lisp

diff --git a/src/lisp/ao_lisp_const.lisp b/src/lisp/ao_lisp_const.lisp
index 1750904496af4ddd36c1ce03ec7eb57c25f5c3a8..861a4fc80eed91314a76453f63528fef4d21340e 100644 (file)
--- 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
@@ -219,16 +226,18 @@
                                        ; expressions to evaluate
 
                   (set! make-exprs (lambda (vars exprs)
-                                     (cond ((not (null? vars)) (cons
-                                                  (list set
-                                                        (list quote
-                                                              (car (car vars))
-                                                              )
-                                                        (cadr (car vars))
-                                                        )
-                                                  (make-exprs (cdr vars) exprs)
-                                                  )
-                                                 )
+                                     (cond ((not (null? vars))
+                                            (cons
+                                             (list set
+                                                   (list quote
+                                                         (car (car vars))
+                                                         )
+                                                   (cond ((null? (cdr (car vars))) ())
+                                                         (else (cadr (car vars))))
+                                                   )
+                                             (make-exprs (cdr vars) exprs)
+                                             )
+                                            )
                                            (exprs)
                                            )
                                      )
@@ -262,6 +271,7 @@
 
 (let ((x 1)) x)
 
+(define let* let)
                                        ; boolean operators
 
 (define or (lexpr (l)
@@ -461,6 +471,58 @@
 
 (define string (lexpr (chars) (list->string chars)))
 
+(display "apply\n")
+(apply cons '(a b))
+
+(define map (lexpr (proc lists)
+                  (let ((args (lambda (lists)
+                                (if (null? lists) ()
+                                  (cons (caar lists) (args (cdr lists))))))
+                        (next (lambda (lists)
+                                (if (null? lists) ()
+                                  (cons (cdr (car lists)) (next (cdr lists))))))
+                        (domap (lambda (lists)
+                                 (if (null? (car lists)) ()
+                                   (cons (apply proc (args lists)) (domap (next lists)))
+                                       )))
+                        )
+                    (domap lists))))
+
+(map cadr '((a b) (d e) (g h)))
+
+(define for-each (lexpr (proc lists)
+                       (apply map proc lists)
+                       #t))
+
+(for-each display '("hello" " " "world" "\n"))
+
+(define -string-ml (lambda (strings)
+                            (if (null? strings) ()
+                              (cons (string->list (car strings)) (-string-ml (cdr strings))))))
+
+(define string-map (lexpr (proc strings)
+                         (list->string (apply map proc (-string-ml strings))))))
+
+(string-map 1+ "HAL")
+
+(define string-for-each (lexpr (proc strings)
+                              (apply for-each proc (-string-ml strings))))
+
+(string-for-each write-char "IBM\n")
+
+(define newline (lambda () (write-char #\newline)))
+
+(newline)
+
+(call-with-current-continuation
+ (lambda (exit)
+   (for-each (lambda (x)
+              (write "test" x)
+              (if (negative? x)
+                  (exit x)))
+            '(54 0 37 -3 245 19))
+   #t))
+
 ;(define number->string (lexpr (arg opt)
 ;                            (let ((base (if (null? opt) 10 (car opt)))
                                        ;