This page is part of the web mail archives of SRFI 44 from before July 7th, 2015. The new archives for SRFI 44 contain all messages, not just those from before July 7th, 2015.
> Bradd W. Szonye wrote: >> That's why it "raises an exception" rather than "signals an error." >> While it isn't necessarily an error, it is an exceptional condition, >> because the procedure can't supply the requested data. scgmille@xxxxxxxxxxxxxxxxxx wrote: > Nevertheless, I'm not sure its a good fit with whats happening. > Besides, both models are possible with an absence thunk: > > (define (absence-exception) (raise foo)) > > (operator value absence-exception) > > ... while the absence thunk itself is conceptually and mechanically > simpler. I wouldn't go that far, but I'll agree that the exception-raising method is not clearly superior. Therefore, this is a matter of personal preference, barely even a minor issue. -- Bradd W. Szonye http://www.szonye.com/bradd