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> It just so happens that I was reading R4RS just earlier today and > thinking that call-with-current-continuation looks pretty cool. Then > I looked at the libguile and found that > call-with-current-continuation is not supported <sob>. It's not? zwingli:jimb$ guile guile> (define call/cc call-with-current-continuation) guile> (define mondo-bizarro (lambda (x) (display 'one) (newline) (call/cc (lambda (k) (x k))) (display 'two) (newline) (call/cc (lambda (k) (x k))) (display 'three) (newline))) guile> (mondo-bizarro mondo-bizarro) one one two one three guile> > I also had a thought about errors... is it currently possible to override > the `error' procedure with your own error procedure and use this to redirect > all of the system errors? Is is safe to redefine `error' for some bits of > code and put back the global value for other sections? You can use catch with a tag of #t to catch all thrown errors. I think that's what you want, no?