<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body text="#000000" bgcolor="#ffffff"> Helmut Rohrbacher wrote at 02/26/2012 07:18 PM:<br> <blockquote cite="mid:CAO5bEZdA49Sz4ydxk2NfWRmWD+3Cpt=uLgqDBZYpN2cPjvXxEQ@mail.gmail.com" type="cite"> <div>What macro voodoo do I need to harness in order to be able to implement the first definition syntax where the <i>args ... -> body</i> segments need not be wrapped in parens?</div> </blockquote> <br> I think that the difficulty is due to using old "syntax-rules".  Nowadays, "syntax-rules" is a hobby for the patient, like building model ships in bottles.<br> <br> I suggest forgetting about "syntax-rules", and using Ryan Culpepper's "syntax-parse" instead.<br> <br> With "syntax-parse", be sure to look at the documentation for splicing syntax classes.<br> <br> Don't be intimidated by the large documentation on "syntax-parse" -- "syntax-parse" is a very nice tool, and is worth learning if you are doing anything that isn't trivial in "syntax-rules".<br> <br> Alternatively, you could also do your "function" macro in "syntax-case", which is a big step up from "syntax-rules", but "syntax-parse" is an even better friend.<br> <br> P.S., If you really want to use "syntax-rules", then Joe Marshall's "syntax-rules" primer teaches enough that you can figure out how to implement your "function" macro.  <a class="moz-txt-link-freetext" href="http://hipster.home.xs4all.nl/lib/scheme/gauche/define-syntax-primer.txt">http://hipster.home.xs4all.nl/lib/scheme/gauche/define-syntax-primer.txt</a><br> <br> <div class="moz-signature">-- <br> <a class="moz-txt-link-freetext" href="http://www.neilvandyke.org/">http://www.neilvandyke.org/</a><br> <br> </div> </body> </html>