From: Stephen Berman <stephen.berman@gmx.net>
To: help-gnu-emacs@gnu.org
Subject: Why does using aset sometimes output raw bytes?
Date: Sun, 09 Dec 2018 16:16:15 +0100 [thread overview]
Message-ID: <87h8fmohmo.fsf@gmx.net> (raw)
When I use aset to change characters in a string to certain non-ascii
characters and insert the result into a buffer, the non-ascii characters
are displayed as raw bytes. This only happens with certain non-ascii
characters, and also only if the string being altered is bound to a
variable and aset takes that variable as argument; if aset operates
directly on the string, those same non-ascii characters are inserted as
the expected characters. To reproduce, start emacs with -Q and evaluate
the following sexp:
(let ((s0 "aous")
(s1 "äöüß")
(s2 "sdfg")
(s3 "ſðđŋ"))
(dolist (s `((,s0 . ,s1) (,s2 . ,s3)))
(dotimes (i 4)
(aset (car s) i (aref (cdr s) i))))
(insert s0 s2 "\n")
(dotimes (i 4)
(insert (aset "aous" i (aref "äöüß" i))))
(dotimes (i 4)
(insert (aset "sdfg" i (aref "ſðđŋ" i)))))
Here's what gets inserted into the buffer (I've represented the raw
bytes by ascii strings to make sure they're readable here):
\344\366\374\337ſðđŋ
äöüßſðđŋ
Is this expected, and if so, what's the explanation, i.e., why does this
happen with some non-ascii characters (e.g. äöüß) but not with others
(e.g ſðđŋ) and why does it happen when aset gets passed a variable
for the string but not when it gets passed the string itself?
Steve Berman
next reply other threads:[~2018-12-09 15:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-09 15:16 Stephen Berman [this message]
2018-12-09 15:20 ` Why does using aset sometimes output raw bytes? Eli Zaretskii
2018-12-09 15:46 ` Stephen Berman
2018-12-09 15:56 ` Stephen Berman
2018-12-09 17:12 ` Eli Zaretskii
2018-12-09 17:32 ` Stephen Berman
2018-12-09 17:47 ` Eli Zaretskii
2018-12-09 18:50 ` Stephen Berman
2018-12-09 18:55 ` Eli Zaretskii
2018-12-09 17:10 ` Stefan Monnier
2018-12-09 17:20 ` Stephen Berman
2018-12-09 19:20 ` Stefan Monnier
2018-12-09 20:23 ` Eli Zaretskii
2018-12-09 21:20 ` Stefan Monnier
2018-12-10 5:59 ` Eli Zaretskii
2018-12-10 13:56 ` Stefan Monnier
2018-12-09 20:43 ` Stephen Berman
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