From: "Mattias Engdegård" <mattiase@acm.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: emacs-devel@gnu.org, Stefan Monnier <monnier@iro.umontreal.ca>,
Juri Linkov <juri@linkov.net>
Subject: Re: Improve `replace-regexp-in-string' ergonomics?
Date: Tue, 12 Oct 2021 15:32:27 +0200 [thread overview]
Message-ID: <949D1725-26B0-4CDB-B647-C6BC2FEDAC3E@acm.org> (raw)
In-Reply-To: <87sfx6bcup.fsf@gnus.org>
> you just
> have to transpose the groups down to where they were again before doing
> the replacement.
We don't even need transposing the match state at run time; we can just as well do the transposing in the replacement string templates at macro-expansion time. If those exceed the syntactic limits of group 9, then generate Lisp code as mentioned before. Don't do more at runtime than actually required.
Transposing the match state is only necessary when the user uses actual Lisp code for the replacement. Even that can be avoided by passing the group number offset as an argument to the user code -- I did that in one instance (although I recall Stefan didn't quite fancy it).
next prev parent reply other threads:[~2021-10-12 13:32 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
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 [this message]
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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