At 2018-05-16T09:12:18-04:00, Alex Knauth wrote:

> Here is a `transform-right-arrow-in` definition that transforms ->
> into →:
>
> #lang racket
> (require racket/require
>          racket/require-syntax
>          (for-syntax syntax/parse))
>
> (begin-for-syntax
>   ;; String -> String
>   (define (transform-right-arrow name)
>     (regexp-replace* #rx"->" name "→")))
>
> (define-require-syntax transform-right-arrow-in
>   (syntax-parser
>     [(transform-right-arrow-in require-spec)
>      #'(filtered-in transform-right-arrow require-spec)]))
>
> ;; Using it:
>
> (require (transform-right-arrow-in racket/base))
>
> (symbol→string 'blubber)

Thanks, this works.  However, at this stage of my experience with
Racket, the direct `filtered-in' method suggested by Jens appears
simpler and easier.  As I said in an earlier message, I seem to be using
it wrongly.

Raghu.

-- 
N. Raghavendra <ra...@hri.res.in>, http://www.retrotexts.net/
Harish-Chandra Research Institute, http://www.hri.res.in/

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