Hi Joe, Thank you. Actually my goal is to run files that do not contain the #lang declaration--only pure non-Racket non-sexp code. Is there a way to (dynamic-require) a module with an externally preset language? I do not know.
I tried your approach anyway. It works well itself, but I have failed (as with all the other approaches) to make a standalone executable from my "interpreter" program. I wonder if anybody tried that with programs of this kind. Best regards, Dmitry On 09/11/2013 05:46 PM, Joe Gibbs Politz wrote:
Hi Dmitry, I've been using `dynamic-require` for Pyret, a non-SEXP based language. For example, here's part of our command-line interface: https://github.com/brownplt/pyret-lang/blob/master/src/cmdline.rkt#L116 You can ignore the parameterization under `check-mode`, which is Pyret specific. The point is that `pyret-file` is a filename handed in as a command-line argument, and we load the module via `dynamic-require`. `dynamic-require` does the work of using the reader/environment specified for the #lang declared in the file, and gets things like relative module imports right, too (at least I haven't been able to do anything too unexpected). This should work for any language that you want to build a file-accepting interface for, not just non-sexp ones. I'm not sure if this is the preferred style or not; if it's not, Pyret should probably use whatever better method there is as well. Cheers, Joe P On Tue, Sep 10, 2013 at 11:14 AM, Dmitry Pavlov <dpav...@ipa.nw.ru> wrote:Hello, I have developed a non-SEXP DSL called SLON, and it works great in DrRacket via "#lang slon" declaration. I have properly set up a lexer, a parser which returns datum or syntax objects, slon/lang/reader.rkt, slon/lang/lang-into.rkt, slon/lang/confugure-runtime.rkt and all the other stuff. Now I need it to work as a stand-alone interpreter which runs files specified by user (outside of DrRacket). How do I do that? The only thing I was able to come up with is using make-evaluator for racket/sandbox: (require slon/slon-parser racket/sandbox) (call-with-input-file* "myprogram.slon" (lambda (port) (parameterize ((sandbox-input (current-input-port)) (sandbox-output (current-output-port))) (call-with-trusted-sandbox-configuration (lambda () ((make-evaluator 'slon/slon-language #:allow-read '("/")) (slon-read port)))))))) Is it the correct way to create a stand-alone interpreter? Because I do not really need a "sandbox" of any kind, and also I was forced to specify #:allow-read '("/") because the SLON programs do read arbitrary files. Also I am having a lot of trouble in making that a stand-alone executable; but I will postpone discussing it because I am not sure whether I chose the right way to do the whole thing. Best regards, Dmitry ____________________ Racket Users list: http://lists.racket-lang.org/users
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