From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: emacs-devel@gnu.org
Subject: Re: Improve `replace-regexp-in-string' ergonomics?
Date: Wed, 22 Sep 2021 14:14:17 -0400 [thread overview]
Message-ID: <jwvee9gwksq.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <878rzpw7jo.fsf@gnus.org> (Lars Ingebrigtsen's message of "Wed, 22 Sep 2021 06:36:27 +0200")
> (replace-regexp-in-string
> "\\[" "(" (replace-regexp-in-string
> "\\]" ")" (replace-regexp-in-string
> ",[[:space:]]" " "
> (replace-regexp-in-string
> "'" "\"" results))))))
To me "the right way" is to pass a function as the replacement.
I'm not sure the way REP currently works in `replace-regexp-in-string`
is the best we can do, but it works:
(replace-regexp-in-string
"[][']\\|,[[:space:]]\\(\\)"
(lambda (s)
(if (match-end 1) " "
(pcase-exhaustive (aref s 0)
(?\[ "(")
(?\] ")")
(?\' "\""))))
results)
It'd be nice to have a front-end that lets you write a kind of lex-like
set of rules, but I think it'd be important for that front-end to allow
*computing* the replacement rather than only selecting it based on the
matched regexp. Something like
(foo-replace results
("\\[" "(")
("\\]" ")")
("[[:lower:]]+" (upcase (match-string 0)))
("siglo \\([0-9]+\\)"
(integer-to-roman (string-to-number (match-string 1))))
...)
-- Stefan
next prev parent reply other threads:[~2021-09-22 18:14 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 4:36 Improve `replace-regexp-in-string' ergonomics? Lars Ingebrigtsen
2021-09-22 5:22 ` Yuri Khan
2021-09-22 6:36 ` Lars Ingebrigtsen
2021-09-22 7:47 ` Thierry Volpiatto
2021-09-22 5:24 ` Po Lu
2021-09-22 6:37 ` Lars Ingebrigtsen
2021-09-22 10:56 ` Po Lu
2021-09-22 20:08 ` Lars Ingebrigtsen
2021-09-23 0:11 ` Po Lu
2021-09-22 7:33 ` Adam Porter
2021-09-22 8:09 ` Lars Ingebrigtsen
2021-09-22 7:51 ` Andreas Schwab
2021-09-22 8:14 ` Augusto Stoffel
2021-09-22 8:21 ` Adam Porter
2021-09-22 18:01 ` Stefan Monnier
2021-09-22 18:24 ` Basil L. Contovounesios
2021-09-22 22:56 ` Adam Porter
2021-09-22 23:53 ` Eric Abrahamsen
2021-09-22 20:06 ` Lars Ingebrigtsen
2021-09-22 10:59 ` Dmitry Gutov
2021-09-22 20:18 ` Lars Ingebrigtsen
2021-09-22 22:23 ` Dmitry Gutov
2021-09-22 23:24 ` [External] : " Drew Adams
2021-09-22 18:14 ` Stefan Monnier [this message]
2021-09-22 19:30 ` Mattias Engdegård
2021-09-22 20:22 ` Lars Ingebrigtsen
2021-09-22 20:29 ` Lars Ingebrigtsen
2021-09-23 2:15 ` Stefan Monnier
2021-10-05 16:18 ` Juri Linkov
2021-10-12 6:53 ` Juri Linkov
2021-10-12 12:10 ` Lars Ingebrigtsen
2021-10-12 12:34 ` Stefan Monnier
2021-10-12 12:41 ` Lars Ingebrigtsen
2021-10-12 13:18 ` Lars Ingebrigtsen
2021-10-12 13:32 ` Mattias Engdegård
2021-10-12 15:48 ` Stefan Monnier
2021-10-12 13:33 ` Thierry Volpiatto
2021-10-12 19:16 ` Juri Linkov
2021-10-12 20:44 ` Thierry Volpiatto
2021-10-13 7:57 ` Juri Linkov
2021-10-13 8:41 ` Thierry Volpiatto
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