[racket] Sweet-expression support in Racket?

 Hi,

 Racket appears to be carefully implemented for multiple syntaxes.  Does 
 that mean that a sweet-expression (or similar) lang or reader already 
 exists?  I have searched around, but cannot find one.

 Thanks,
 Andrew

 PS Sweet expressions - 
 http://www.dwheeler.com/readable/sweet-expressions.html