Thanks, Vincent.
I didn't know traces had to be in the program itself.
Michael
________________________________
From: Vincent St-Amour <stamo...@ccs.neu.edu>
To: michael rice <nowg...@yahoo.com>
Cc: Vincent St-Amour <stamo...@ccs.neu.edu>; Racket Users
<users@racket-lang.org>
Sent: Monday, October 10, 2011 1:49 PM
Subject: Re: [racket] Trace rejects set!
At Mon, 10 Oct 2011 10:31:39 -0700 (PDT),
michael rice wrote:
>
> Welcome to DrRacket, version 5.1.3 [3m].
> Language: racket; memory limit: 128 MB.
> > (trace next-leaf-generator)
> set!: cannot modify a constant: next-leaf-generator
Try adding `(trace next-leaf-generator)' to the program itself, that
should work.
The interactions window is not part of the program, which is in its
own module. Since you can't mutate variables except in the module
where they're defined, you can't add tracing from the interactions
window.
Vincent
_________________________________________________
For list-related administrative tasks:
http://lists.racket-lang.org/listinfo/users
