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Michael Sperber <sperber@xxxxxxxxxxxxxxxxxxxxxxxxxxx> writes: > >>>>> "Matze" == Matthias Neubauer <neubauer@xxxxxxxxxxxxxxxxxxxxxxxxxx> writes: > > Matze> Additionally, #f feels more like signaling "the end" to me > Matze> ... :-) > > More so than '(), the literal for what's officially called the "empty > list"? Yeah, definitely! Note that the result we are returning here is *not* the result stream per se; it rather specifies the *new elements* that we want to prepend to the result stream. So, this case is more like a typical error case, saying something like "Dude, you have to stop prepending to the result stream ..." I always thought cases like this are typically signaled by #f in Scheme, aren't they? -Matthias -- Matthias Neubauer | Universität Freiburg, Institut für Informatik | tel +49 761 203 8060 Georges-Köhler-Allee 79, 79110 Freiburg i. Br., Germany | fax +49 761 203 8052