Hi Rudolf, Bill would be the person to address this better than me, but I think the Egghead team should read through the s7.html page pretty closely to see if s7 is a good fit. It's pretty clear in there that there is *limited* R7RS compatibility, but that s7 is not R7RS and nor is that a stated goal. For example, s7 does not do macros with syntax-case or syntax-rules, but uses CL style macros. If R7RS is what you need, you might be better off with an implementation that makes that a goal, such as Chibi. I use s7 embedded in audio programs, which shares a fair bit of domain space with games, and I personally chose s7 because the performance and ease of embedding made up for that, but YMMV!
HTH iain On Mon, Jan 17, 2022 at 7:36 AM Rudolf Adamkovič <[email protected]> wrote: > Hi there! > > At Egghead Games, we would like to use Scheme for in-app scripting. We > wired up s7 and SQLite to kick things off, but s7 support for R7RS does > not seem to work. Below, I include some examples to illustrate my > point. > > A basic example from the R7RS standard, page 54, … > > (with-exception-handler > (lambda (x) > (display "something went wrong\n")) > (lambda () > (+ 1 (raise ’an-error)))) > > … results in: > > > Error: catch error handler should accept two arguments: #<lambda (x)> > > The simplest library … > > (load "r7rs.scm") > (define-library (some lib) > (export some-proc) > (import (scheme base) > (scheme r5rs)) > (begin > (define (some-proc x) > (display x)))) > > … results in: > > > Error: symbol->value first argument, {gensym}-1, is a macro but should > > be a symbol (define-macro ({gensym}-1 . names)... > > We picked s7 because the website says … > > > I believe it is compatible with r5rs and r7r > > … but per a quick grep, there seem to exist no tests for define-library > or with-exception-handler. > > Any ideas? > > Rudy > -- > "Logic is a science of the necessary laws of thought, without which no > employment of the understanding and the reason takes place." -- Immanuel > Kant, 1785 > > Rudolf Adamkovič <[email protected]> [he/him] > Studenohorská 25 > 84103 Bratislava > Slovakia > > _______________________________________________ > Cmdist mailing list > [email protected] > https://cm-mail.stanford.edu/mailman/listinfo/cmdist >
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