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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: <tomas@tuxteam.de>
Cc: emacs-devel@gnu.org
Subject: Re: "Raw" string literals for elisp
Date: Wed, 08 Sep 2021 16:18:23 -0400	[thread overview]
Message-ID: <jwv8s06x1zg.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20210908160531.GA18656@tuxteam.de> (tomas@tuxteam.de's message of "Wed, 8 Sep 2021 18:05:32 +0200")

> I just think these are two separate dimensions which happen to align
> in the "regexp and backslash" case.

BTW, they can align in somewhat funny ways sometimes.
E.g. the raw-string version of the regexp "[ \t\n]" turns into something like

    #r"[
]"

which is not ideal in terms of clarity.  Similarly a regexp that matches
the NUL character will be problematic when written as a raw string
because it will need to embed the NUL character in the source code,
which in turn will cause tools like `grep` to treat the file as binary.

For the first problem above we can/should extend our regexp syntax to
include \t and \n as regexps that match TAB and LF respectively (that
would also be handy when writing regexps in the minibuffer).
But \0 is already used for other things so there's no such "obvious"
workaround for the second case :-(


        Stefan




  parent reply	other threads:[~2021-09-08 20:18 UTC|newest]

Thread overview: 120+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-08  1:49 "Raw" string literals for elisp Anna Glasgall
2021-09-08  7:10 ` Po Lu
2021-09-08 14:19   ` Anna Glasgall
2021-09-08  7:12 ` Lars Ingebrigtsen
2021-09-08 14:20   ` Anna Glasgall
2021-09-08 11:30 ` Alan Mackenzie
2021-09-08 14:27   ` Anna Glasgall
2021-09-08 11:34 ` Adam Porter
2021-09-08 13:59   ` Clément Pit-Claudel
2021-09-08 14:12     ` Adam Porter
2021-09-09  3:09   ` Richard Stallman
2021-09-08 13:10 ` Stefan Monnier
2021-09-08 14:31   ` Anna Glasgall
2021-09-08 15:27     ` Mattias Engdegård
2021-09-08 15:41       ` Stefan Kangas
2021-09-08 16:45         ` Mattias Engdegård
2021-09-08 16:01       ` Alan Mackenzie
2021-09-08 18:24         ` Mattias Engdegård
2021-09-08 19:00           ` Alan Mackenzie
2021-09-08 19:22         ` Philip Kaludercic
2021-09-08 19:36           ` Alan Mackenzie
2021-09-08 21:11           ` Stefan Kangas
2021-09-08 21:24             ` Philip Kaludercic
2021-09-09  6:52             ` tomas
2021-09-08 15:54     ` Stefan Kangas
2021-09-08 16:05     ` tomas
2021-09-08 16:42       ` Lars Ingebrigtsen
2021-09-08 20:08         ` Stefan Monnier
2021-09-08 20:18       ` Stefan Monnier [this message]
2021-09-09  7:04         ` tomas
2021-09-09 10:30         ` Mattias Engdegård
2021-09-09 11:36           ` Stefan Kangas
2021-09-09 13:33             ` Mattias Engdegård
2021-09-09 14:32               ` tomas
2021-09-14 10:43               ` Augusto Stoffel
2021-09-14 11:42                 ` Ihor Radchenko
2021-09-14 13:18                   ` Stefan Monnier
2021-09-14 13:22                     ` Stefan Kangas
2021-09-14 14:01                       ` Ihor Radchenko
2021-09-14 14:39                       ` Clément Pit-Claudel
2021-09-14 15:33                         ` Amin Bandali
2021-09-14 16:05                         ` Eli Zaretskii
2021-09-14 17:49                   ` Jose E. Marchesi
2021-09-08 20:40 ` Anna Glasgall
2021-09-08 21:28   ` Alan Mackenzie
2021-10-02 21:03   ` Daniel Brooks
2021-10-04  0:13     ` Richard Stallman
2021-10-04  0:36       ` Daniel Brooks
2021-10-04 12:00         ` Eli Zaretskii
2021-10-04 15:36           ` character sets as they relate to “Raw” " Daniel Brooks
2021-10-04 16:34             ` Stefan Monnier
2021-10-04 20:49               ` Daniel Brooks
2021-10-04 21:19                 ` Alan Mackenzie
2021-10-04 22:19                   ` Daniel Brooks
2021-10-05 11:20                     ` Alan Mackenzie
2021-10-05 17:08                       ` Daniel Brooks
2021-10-06 20:54                         ` Richard Stallman
2021-10-07  7:01                           ` Eli Zaretskii
2021-10-05  8:55                 ` Yuri Khan
2021-10-05 16:25                   ` Juri Linkov
2021-10-05 17:15                     ` Eli Zaretskii
2021-10-05 18:40                       ` [External] : " Drew Adams
2021-10-06 20:54                       ` Richard Stallman
2021-10-07  6:54                         ` Eli Zaretskii
2021-10-07 13:14                           ` Stefan Kangas
2021-10-07 13:34                             ` Eli Zaretskii
2021-10-07 14:48                               ` Stefan Kangas
2021-10-07 16:00                                 ` Eli Zaretskii
2021-10-08  0:37                                   ` Stefan Kangas
2021-10-08  6:53                                     ` Eli Zaretskii
2021-10-08 15:09                                       ` Display of em dashes in our documentation Stefan Kangas
2021-10-08 16:12                                         ` Eli Zaretskii
2021-10-08 17:17                                           ` Stefan Kangas
2021-10-10  8:00                                             ` Juri Linkov
2021-10-08 17:27                                           ` Daniel Brooks
2021-10-08 18:26                                           ` [External] : " Drew Adams
2021-10-08 17:17                                       ` character sets as they relate to “Raw” string literals for elisp Alan Mackenzie
2021-10-08 17:42                                         ` Eli Zaretskii
2021-10-08 18:47                                           ` Eli Zaretskii
2021-10-08 20:01                                             ` Alan Mackenzie
2021-10-09  6:18                                               ` Eli Zaretskii
2021-10-09 10:57                                                 ` Alan Mackenzie
2021-10-09 11:49                                                   ` Eli Zaretskii
2021-10-09 13:08                                                     ` Alan Mackenzie
2021-10-09 13:15                                                       ` Eli Zaretskii
2021-10-09 15:07                                                         ` Alan Mackenzie
2021-10-11  0:45                                                           ` linux console limitations Daniel Brooks
2021-10-12 10:18                                                             ` Alan Mackenzie
2021-10-14  4:05                                                               ` Daniel Brooks
2021-10-10  8:03                                                   ` character sets as they relate to “Raw” string literals for elisp Juri Linkov
2021-10-05 18:23                     ` [External] : " Drew Adams
2021-10-05 19:13                       ` Stefan Kangas
2021-10-05 19:20                         ` Drew Adams
2021-10-05 17:13                   ` Daniel Brooks
2021-10-05 12:04                 ` Eli Zaretskii
2021-10-05 21:20                 ` Richard Stallman
2021-10-05 22:13                   ` Daniel Brooks
2021-10-06 12:13                     ` Eli Zaretskii
2021-10-06 18:57                       ` Daniel Brooks
2021-10-07  4:23                         ` Eli Zaretskii
2021-10-07 22:27                         ` Richard Stallman
2021-10-08 10:37                         ` Po Lu
2021-10-08 10:53                           ` Basil L. Contovounesios
2021-10-08 11:27                             ` tomas
2021-10-05 22:25                   ` character sets as they relate to “Raw†" Stefan Kangas
2021-10-06  6:21                     ` Daniel Brooks
2021-10-07 22:20                       ` Richard Stallman
2021-10-06 12:29                     ` Eli Zaretskii
2021-10-06 12:52                       ` Stefan Kangas
2021-10-06 13:10                         ` Jean-Christophe Helary
2021-10-06 11:53                   ` character sets as they relate to “Raw” " Eli Zaretskii
2021-10-04 18:57             ` Eli Zaretskii
2021-10-04 19:14               ` Yuri Khan
2021-10-05 21:20                 ` Richard Stallman
2021-10-06  3:48                   ` character sets as they relate to “Raw†" Matthew Carter
2021-10-04 22:29         ` "Raw" " Richard Stallman
2021-10-05  5:39           ` Daniel Brooks
2021-10-05  5:43             ` Jean-Christophe Helary
2021-10-05  8:24               ` Richard Stallman
2021-10-05 12:23               ` Eli Zaretskii

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