[racket] Determining if already defined?

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

http://pkg-build.racket-lang.org/doc/mischief@mischief/Definitions_and_Binding_Forms.html

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
> ____________________
>   Racket Users list:
>   http://lists.racket-lang.org/users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.racket-lang.org/users/archive/attachments/20141114/681dfa55/attachment.html>