[racket] Not eof evt...

I see that there is an eof-evt that goes ready once an input port hits eof.

I am in need of an event for an input port, that is ready only when a
non-eof would be read from that port, and is never ready once an eof is hit.


For some reason, I'm having difficulty composing my own (like say by using
guard-evt)...

Does anybody know of a nice way of doing this?


Thanks,
    Curtis
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