[racket] Determining if already defined?

From: Carl Eastlund (carl.eastlund at gmail.com)
Date: Fri Nov 14 18:43:29 EST 2014

If you install the package "mischief", you can use define-if-unbound and
similar forms.


Carl Eastlund

On Fri, Nov 14, 2014 at 5:27 PM, Kevin Forchione <lysseus at gmail.com> wrote:

> Hi guys,
> Is there a way to determine, from within a macro, if something is already
> defined and, so that the macro can define it if not and skip the definition
> if not?
> -Kevin
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>   http://lists.racket-lang.org/users
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