Testing

test2.scm

@@ -15,10 +15,26 @@
 ;    (display 'world)))
 
 ; BEGIN test code - trying to get definition of with-output-to-file to work
-(define old (current-output-port))
-(define new (current-output-port '<param-convert> (open-output-file "test.txt")))
+    (define (my-make-parameter init . o)
+      (let* ((converter
+               (if (pair? o) (car o) (lambda (x) x)))
+             (value (converter init)))
+        (lambda args
+          (cond
+            ((null? args)
+             value)
+            ((eq? (car args) '<param-set!>)
+             (set! value (cadr args)))
+            ((eq? (car args) '<param-convert>)
+             converter)
+           (else
+             (error "bad parameter syntax"))))))
+    (define my-param
+      (my-make-parameter (Cyc-stdout)))
+(define old (my-param))
+(define new (my-param '<param-convert> (open-output-file "test.txt")))
 ; The next line seems to crash in icyc but not in compiled code (until write, at least). what's going on??
-(current-output-port '<param-set!> new)
-;(write 'test (current-output-port))
+(my-param '<param-set!> new)
+(write 'test (my-param))
 ;(write 'hello-world)
 ; END test code