You're right that `|` isn't a valid terminal with the normal reader, but, as it happens, the zero-length identifier can be written as `||`. (I don't think the concept of a zero-length identifier is common in other languages: it corresponds to the empty string.)
-Philip On Mon, Feb 3, 2020 at 6:27 PM Kevin Forchione <lyss...@gmail.com> wrote: > Hi guys, > I’ve been trying to figure out how to use “|” in a macro. I’ve got syntax > like this in mind: > > (foo A | B) > > Not sure if I can do this because the reader expects a pair. If “|” isn’t > a convenient literal to work with is there an alternative others have used > that represents more or less the idea of “or” or “alternate”? > > Thanks! > > Kevin > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/447100AA-DB45-46C3-A7DC-2705A1668302%40gmail.com > . > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CAH3z3gbfU7x6y_XHmK-uKUeH%3D4exbnvw8wUNzNnipzOMeC7bbQ%40mail.gmail.com.
