Do you mean something like this?:
(provide (rename-out [-#%module-begin #%module-begin]))
(define-syntax-rule (-#%module-begin form ...)
(#%module-begin
(module configure-runtime racket/base
(current-prompt-read
(let ([old-prompt-read (current-prompt-read)])
(lambda ()
(parameterize ([current-readtable (make-readtable-for-my-lang)])
(old-prompt-read))))))
form ...))
On Oct 24, 2014, at 11:19 PM, Matthew Flatt <mfl...@cs.utah.edu> wrote:
> I think a `configure-runtime` submodule (in the expansion of any module
> using the language) is the right place for this kind of configuration.
>
> The `configure-runtime` submodule is similar to `main`, it that it is
> only used when the enclosing module is the main module of a program.
>
> Instead of a direct `(current-readtable ...)`, I think you'll want a
> direct `(current-prompt-read ...)`, where the prompt read handler uses
> `(parameterize ([current-readtable ...]) (read-syntax ...))`.
>
> At Fri, 24 Oct 2014 22:56:37 -0400, "Alexander D. Knauth" wrote:
>> Is there a way to specify a reader for the repl for a language?
>>
>> One bad way to do this would be to modify #%module-begin to include
>> (current-readtable (make-readtable-for-my-lang))
>> or something like that.
>> See
>> https://github.com/greghendershott/rackjure/pull/46
>> https://github.com/greghendershott/rackjure/pull/46#issuecomment-60378324
>>
>> One problem with this is that if this module is required from a module
>> without
>> this language, it would affect that module’s current-readtable.
>>
>> So is there a better solution, and if there’s not, would it be possible to
>> add
>> it?
>>
>>
>>
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