[racket] "read"ing sets

I can "write" a set.

(write (set 1 2 3 4)) => "#<set: 1 2 3 4>"

However when I try to read that...

(with-input-from-string "#<set: 1 2 3 4>" read) =>  read: bad syntax `#<'

Is there a technical reason why sets can't be read just like lists, hashes,
numbers etc? (Other than via serialization)

I'd like to hook into it with a reader extension somehow but the reader
documentation seems a bit terse in that area.

Does anyone know of some good places to look in the source for guidance?


Thanks,
    Curtis Dutton
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