[racket] Style mistakes (was: static variables question)

On Sun, Feb 19, 2012 at 09:10:57PM -0500, Eli Barzilay wrote:
[...]
> Speaking about such transformations and about things like (if E #t #f),
> I have some code which I run against student submissions to find style
> problems like these, and using syntax transformations means that it's
> easy to make it actually suggest the transformation.  For example,
> feeding it this code:
[...]
> Actually, there's a few more things it prints -- it's not intended to
> be used without a human going over its output.  In case someone is
> interested in such a project I can send out the code.  It could even
> make a cute drracket tool that criticizes your code...
> 
> -- 
>           ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
>                     http://barzilay.org/                   Maze is Life!

I suspect lots of us do some amount of this: I'd definitely be interested in
 having yours. For the next assignment my students are going to flesh out a
 small tool with what 'syntax-rules' can match, and perhaps they'll get a
 little form that receives the datum so they can catch more by working on the
 s-expression as value the way they did with Π-exprs. Oh, that's 'define-macro'
 isn't it ---just had a blind spot due to avoiding 'define-macro' for pretty
 much any other use except to talk about the concept of macros.