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1. Embed this notice
   Ethan Blanton (elb@social.sdf.org)'s status on Friday, 06-Dec-2024 04:03:01 JST Ethan Blanton

   I was just grousing about all the extra backwhacking of regexes in lisps, and like ... why don't lisps have #// regex readers? This seems like a neat and simple solution to that problem. Just turn #/regex/ into (make-regexp "regex-with-doubled-backslashes") and everybody's happy.

   Someone do this for #Emacs #lisp stat, please.

   • Embed this notice
     screwlisp (screwtape@mastodon.sdf.org)'s status on Friday, 06-Dec-2024 04:02:58 JST screwlisp

     in reply to

     • Thomas
     • Erik L. Arneson :emacs:

     @elb
     Proximally, I was thinking recently it was because #/ was the character dispatch macro in zetalisp in the early 80s. Now it's #\, but I had to add #/ as the "zetalisp character dispatch macro" to run some zetalisp code recently. So there's a reason to choose something else. Also ~/foo:bar/ is a format control in lisp (call the exported bar from foo on the output stream).
     To my knowledge, it's encouraged to use the unused bracket characters for this kind of stuff.
     @tfb @pymander

   • Embed this notice
     Thomas (tfb@functional.cafe)'s status on Friday, 06-Dec-2024 04:02:59 JST Thomas

     in reply to

     • Erik L. Arneson :emacs:

     @pymander @elb IME the result of sexpr regexp systems like rx is no clearer than normal regexp syntax, just much less concise

   • Embed this notice
     Erik L. Arneson :emacs: (pymander@fosstodon.org)'s status on Friday, 06-Dec-2024 04:03:00 JST Erik L. Arneson :emacs:

     in reply to

     @elb You might also enjoy the `rx` macro in #emacs!

   • Embed this notice
     Ethan Blanton (elb@social.sdf.org)'s status on Friday, 06-Dec-2024 05:23:41 JST Ethan Blanton

     in reply to

     • Thomas
     • screwlisp
     • Erik L. Arneson :emacs:

     @screwtape
     I could easily be sold on some syntax other than #//, just so long as my regexps don't turn into \\\\(\\\\) all over the place!
     @tfb @pymander

   • Embed this notice
     screwlisp (screwtape@mastodon.sdf.org)'s status on Friday, 06-Dec-2024 05:23:41 JST screwlisp

     in reply to

     • Thomas
     • Erik L. Arneson :emacs:

     @elb
     I guess it's kind of similar to format control strings, isn't it, because they have many similar attributes to regex control strings. Ie
     CL-USER> (format t "\"\\\"~%")
     "\"
     CL-USER> (format t "~s~%" "\\")
     "\\"
     CL-USER> (format t "~a~a~a~%" #\" #\\ #\")

     I guess it's hard to do, isn't it.
     @tfb @pymander

   • Embed this notice
     screwlisp (screwtape@mastodon.sdf.org)'s status on Friday, 06-Dec-2024 05:38:13 JST screwlisp

     in reply to

     • Thomas
     • Erik L. Arneson :emacs:

     @elb

     I was kind of hoping there would be a nice series expression that just "was regex", but I didn't find it yet.
     (require :series)
     (series::install)
     (let ((to-filter #z(a b c d e))
     (filters (series '(b d))))
     (collect
     (choose
     (#Mmember to-filter filters)
     to-filter)))
     (series::install :remove t)
     There are only five candidate decades for someone to have written it in, I'll find it eventually..

     @tfb @pymander

   • Embed this notice
     Ethan Blanton (elb@social.sdf.org)'s status on Friday, 06-Dec-2024 05:38:14 JST Ethan Blanton

     in reply to

     • Thomas
     • screwlisp
     • Erik L. Arneson :emacs:

     @screwtape Yeah, probably a generalized robustly-quoted string syntax and passing it to the regexp compilation function would be fine, and it would also solve other string quoting struggles.
     @tfb @pymander

     screwlisp repeated this.