Re: Is there a way to transparently re-throw?

[Mikael Djurfeldt]

Dirk Herrmann <address@hidden> writes:

> It is still interesting to know how one could implement a 'rethrow'
> function.

There's no need to implement a special rethrow function.  The key is
rather that a `catch' pops the stack before invoking the handler, thus
removing all information about the error.

I've now added a new module (ice-9 stack-catch) to the CVS guile which
you can use for rethrowing of errors:

(define (foo)
  (stack-catch #t
               (lambda () (koko))
               (lambda args
                 (apply throw args))))

(foo)
<unnamed port>:3:19: In expression (koko):
<unnamed port>:3:19: Unbound variable: koko
ABORT: (unbound-variable)

Best,
/mdj