chickadee » scheme » base » with-exception-handler

It is an error if handler does not accept one argument. It is also an error if thunk does not accept zero arguments. The with-exception-handler procedure returns the results of invoking thunk. Handler is installed as the current exception handler in the dynamic environment used for the invocation of thunk.

(call-with-current-continuation
 (lambda (k)
  (with-exception-handler
   (lambda (x)
    (display "condition: ")
    (write x)
    (newline)
    (k 'exception))
   (lambda ()
    (+ 1 (raise 'an-error))))))
         ==> exception and prints "condition: an-error"

(with-exception-handler
 (lambda (x)
  (display "something went wrong\n"))
 (lambda ()
  (+ 1 (raise 'an-error))))

prints "something went wrong" After printing, the second example then raises another exception.