[racket] Passing information between syntax classes

Galler writes:

 > Adding the super-bar syntax-class below 
 > and the following #with directive to the foo syntax class
 > 
 > #:with sb:super-bar   #'((foo-symbol ...) (bar.symbol ...))
 > 
 > should accomplish what you want without recourse to explicit parameters

That's an interesting approach, I didn't know it was possible to
re-match attributes of one syntax class to another syntax class.
I can see a couple of use cases outside of the problem that I posted
here, so I'll explore this in more detail.

Thanks,
  Konrad.