Continuing my attempts to make a working meta-language, I'm now working on
improving the documentation. I'd like to be able to use “interaction” from
scribble/eval with a custom evaluator, but I'm having trouble getting a custom
evaluator to work with my language.
I've tried using (make-module-evaluator "#lang curly-fn racket/base"), but that
only enables the curly-fn reader for reading the initial program, not the
additional input passed to the evaluator.
I have managed to do this sort of thing to get it working.
(parameterize ([sandbox-output 'string]
[sandbox-error-output 'string]
[sandbox-reader
(λ (in)
(parameterize ([current-readtable (make-curly-fn-readtable)])
(reverse
(let loop ([acc null])
(define r (read-syntax in (current-input-port)))
(if (eof-object? r) acc (loop (cons r acc)))))))])
(make-module-evaluator "#lang curly-fn racket/base"))
That works, but I'm wondering if there's a better way.
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