I'd like to be able to eval a custom language from inside a module... without instantiating modules multiple times.
With the help of Matthew Butterick, I've gotten this far: ; runtime.rkt #lang racket (printf "This is runtime.rkt~n") ; example.rkt #lang racket (require "runtime.rkt") (provide foo) (printf "This is example.rkt~n") (define-syntax foo (syntax-rules () ((foo) (printf "foo!~n")))) ; eval-example.rkt #lang racket (require racket/runtime-path) (require "runtime.rkt") (provide eval-example) (define-runtime-path example "example.rkt") (define example-namespace (make-base-empty-namespace)) (parameterize ((current-namespace example-namespace)) (namespace-require example)) (define (eval-example code) (parameterize ((current-namespace example-namespace)) (eval code))) however this instantiates runtime.rkt twice: $ racket eval-example.rkt This is runtime.rkt This is runtime.rkt This is example.rkt which turns out to be bad (for example, if I define a struct in the runtime, I end up having a different struct types). I want there to be a single copy of the runtime.rkt module (much like if I had said (require "runtime.rkt") from two different modules). What I want to do is rather simple (I hope): define a custom language in a module such as example.rkt, and then be able to eval that language. Is there a way to do this? -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.