That function extracts the runtime environment from an unbound-global exception object which is raised by eval when an unbound global variable is accessed. The rte is the runtime environment at the point where the access occured. It is useful to get debugging information about the context of an error. Here’s an example of how this can be used:

(define (f x) (+ x (* foo 2)))

(with-exception-catcher (lambda (e) (let* ((variable (unbound-global-exception-variable e)) (code (unbound-global-exception-code e)) (rte (unbound-global-exception-rte e)) (container (##extract-container code rte))) (pp (list 'unbound-global variable 'in container)))) (lambda () (f 10)))

;; prints: ;; ;; (unbound-global foo in #<procedure #2 f>)

Marc

On Sep 23, 2016, at 2:33 AM, Vijay Mathew vijay.the.lisper@gmail.com wrote:

What does `unbound-global-exception-rte` return? This seems to be undocumented.

Thanks,

--Vijay _______________________________________________ Gambit-list mailing list Gambit-list@iro.umontreal.ca https://webmail.iro.umontreal.ca/mailman/listinfo/gambit-list