From: Lars Ingebrigtsen <larsi@gnus.org>
To: "Mattias Engdegård" <mattiase@acm.org>
Cc: 43598@debbugs.gnu.org
Subject: bug#43598: replace-in-string: finishing touches
Date: Fri, 25 Sep 2020 01:18:13 +0200 [thread overview]
Message-ID: <87ft76u5l6.fsf@gnus.org> (raw)
In-Reply-To: <87k0wiub35.fsf@gnus.org> (Lars Ingebrigtsen's message of "Thu, 24 Sep 2020 23:19:26 +0200")
Lars Ingebrigtsen <larsi@gnus.org> writes:
> That is, we could just say "the results are undefined if the strings
> contain raw bytes". Well, rather, if both strings are raw bytes, or
> none of them are, then it's well-defined, but not otherwise.
Or... OK, I've never actually looked at the strings this closely, I've
just used the various accessors which hide all the complexity.
So: "a\377ø" is a multibyte string with five bytes (the "raw byte" is in
the private plane).
"a\377a" is a unibyte string with three bytes.
So searching for "\377" (one-byte unibyte string) and (make-string 1
255) (two-byte multibyte string) should be well-defined in either
combination here?
"\377" is in both "a\377ø" and "a\377a".
(make-string 1 255) is in neither "a\377ø", nor "a\377a".
And:
(eq (elt (make-string 1 255) 0) (elt "\377" 0))
=> t
But, like, whatevs.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2020-09-24 23:18 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-24 20:52 bug#43598: replace-in-string: finishing touches Mattias Engdegård
2020-09-24 21:12 ` Lars Ingebrigtsen
2020-09-24 21:19 ` Lars Ingebrigtsen
2020-09-24 23:18 ` Lars Ingebrigtsen [this message]
2020-09-25 9:21 ` Eli Zaretskii
2020-09-25 10:09 ` Lars Ingebrigtsen
2020-09-24 23:54 ` Lars Ingebrigtsen
2020-09-25 10:42 ` Mattias Engdegård
2020-09-25 11:11 ` Lars Ingebrigtsen
2020-09-25 11:22 ` Mattias Engdegård
2020-09-25 11:32 ` Lars Ingebrigtsen
2020-09-27 0:03 ` Lars Ingebrigtsen
2020-09-27 0:34 ` Lars Ingebrigtsen
2020-09-27 8:45 ` Mattias Engdegård
2020-09-28 3:41 ` Richard Stallman
2020-09-28 9:40 ` Mattias Engdegård
2020-09-29 3:29 ` Richard Stallman
2020-09-29 4:12 ` Eli Zaretskii
2020-09-27 11:12 ` Mattias Engdegård
2020-09-27 11:48 ` Lars Ingebrigtsen
2020-09-27 11:57 ` Mattias Engdegård
2020-09-27 12:02 ` Lars Ingebrigtsen
2020-09-27 16:14 ` Mattias Engdegård
2020-09-27 16:19 ` Eli Zaretskii
2020-09-27 16:41 ` Lars Ingebrigtsen
2020-09-27 16:48 ` Eli Zaretskii
2020-09-26 22:44 ` Lars Ingebrigtsen
2020-09-26 22:25 ` Lars Ingebrigtsen
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