Re: Scheme Mode and Regular Expression Literals

[Jakub T. Jankiewicz]

This is perfect, thank you.

I also just noticed (while reading the docs) that GNU Kawa also have the same
syntax for regular expressions.

On Sat, 09 Mar 2024 11:59:10 +0900
Toshi Umehara <toshi@niceume.com> wrote:

> Regular expression literals as exist in Gauche Scheme does not seem to
> work in scheme mode. #/regexp/ is not dealt as a chunk. I looked for its
> solution on the Web, and reached this web page,
> https://ardggy.hatenablog.jp/entry/2015/11/24/143713 (in Japanese).  The
> solution on the page overwrites syntax-propertize-function and adds a
> new rule for regular expression literals. I got a hint from it, and have
> tried to manage backslash slash ( \/ ) not to finish the literal and
> backshashes of even numbers (like \\\\ ) not to work as escapes.
> 
> Currently, the following code in init.el works for me.
> 
> #+BEGIN_SRC
> (add-hook 'scheme-mode-hook
>           (lambda ()
>             (setq-local
>              syntax-propertize-function
>              (lambda (start end)
>                (goto-char start)
>                (funcall
>                 (syntax-propertize-rules
>                  ;; For #/regexp/ syntax
>                  ("\\(#\\)/\\(\\\\/\\|\\\\\\\\\\|.\\)*?\\(/\\)"
>                   (1 "|")
>                   (3 "|"))
>                  ;; For #; comment syntax
>                  ("\\(#\\);"
>                   (1 (prog1 "< cn"
>                        (scheme-syntax-propertize-sexp-comment
>                         (point) end)))))
>                 (point) end))
>              ))
>           )
> #+END_SRC
> 
> Hope this helps.
> 

--
Jakub T. Jankiewicz, Senior Front-End Developer
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