[racket] (if ...) form without an else

From: lothar atheling (lothar_ at warpmail.net)
Date: Wed Apr 11 14:42:20 EDT 2012

usually an (if ...) form without an else part does not cause an error.

but sometimes it does, as the following shows:


if: bad syntax (must have an "else" expression) in: (if isinitialised
(expose))

why the different behavior?

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