[racket] read-syntax for an entire .rkt file

Thank you both for your help! This is what I ended up with:

(define port (open-input-file "..."))
(with-module-reading-parameterization
  (lambda ()
    (pretty-print (syntax->datum (parameterize ([current-namespace
(make-base-namespace)])
                                   (expand (read-syntax (object-name port)
port)))))))

I apologize for sending out two different emails on the same question. I
had sent one before subscribing and thought it was discarded when it was
actually only queued for approval.

--
Tom

On Wed, Feb 18, 2015 at 8:49 PM, Spencer Florence <spencer at florence.io>
wrote:

> There is also a `with-module-reading-parameterization` that sets up the
> reader to do this.
>
> On Wed, Feb 18, 2015, 10:36 PM Sam Tobin-Hochstadt <samth at cs.indiana.edu>
> wrote:
>
>> On Wed, Feb 18, 2015 at 10:22 PM, Thomas Gilray <thomas.gilray at gmail.com>
>> wrote:
>> > Hi everyone,
>> >
>> > I am trying to figure out how to use read-syntax on a port for an entire
>> > .rkt file. I then want to call (expand ...) on this and get back a
>> (begin
>> > ...) or (module ...) for the entire file in fully expanded form.
>> >
>> > If I run (expand #`(define ...)) under a #lang racket, everything
>> works. If
>> > I place this in a file and use read-syntax however, each top-level
>> > expression is returned individually, the language declaration isn't
>> > supported, and without this information the expander complains that
>> "define"
>> > isn't defined. How do I properly read-syntax a whole file at once?
>> >
>> > Any ideas would be greatly appreciated.
>>
>> I've implemented this a couple times recently, probably the best
>> version is here:
>> https://github.com/samth/pycket/blob/master/pycket/pycket-lang/expand.rkt
>>
>> The short answer is that you want to use `read-accept-lang` to enable
>> #lang, call `read-syntax` once on the port, and the call `expand` in a
>> new namespace (probably created with `make-base-namespace`).
>>
>> Sam
>> ____________________
>>   Racket Users list:
>>   http://lists.racket-lang.org/users
>>
>
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