<div dir="ltr">If you install the package "mischief", you can use define-if-unbound and similar forms.<br><br><a href="http://pkg-build.racket-lang.org/doc/mischief@mischief/Definitions_and_Binding_Forms.html">http://pkg-build.racket-lang.org/doc/mischief@mischief/Definitions_and_Binding_Forms.html</a><br></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature">Carl Eastlund</div></div>
<br><div class="gmail_quote">On Fri, Nov 14, 2014 at 5:27 PM, Kevin Forchione <span dir="ltr"><<a href="mailto:lysseus@gmail.com" target="_blank">lysseus@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi guys,<br>
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?<br>
<br>
-Kevin<br>
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