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* bug#33205: 26.1; unibyte/multibyte missing in rx.el
@ 2018-10-30 15:03 Mattias Engdegård
  2018-10-30 17:27 ` Eli Zaretskii
  0 siblings, 1 reply; 17+ messages in thread
From: Mattias Engdegård @ 2018-10-30 15:03 UTC (permalink / raw)
  To: 33205

rx.el has constructs corresponding to all named regexp character
classes ([[:alnum:]], [[:digit:]], etc) except unibyte and multibyte.
This looks like a simple omission.

Or is it on purpose? The ascii and nonascii classes appear very
similar; I haven't been able to see any operational difference from
unibyte and multibyte, respectively. In fact, neither seem to work as
expected on unibyte strings or buffers:

(setq s "A\310")
"A\310"
(multibyte-string-p s)
nil
(string-match-p "A[[:nonascii:]]" s)
nil
(string-match-p "A[[:ascii:]]" s)
nil
(string-match-p "A[[:unibyte:]]" s)
nil
(string-match-p "A[[:multibyte:]]" s)
nil
(string-match-p "A." s)
0

What is going on here? ascii/nonascii and unibyte/multibyte are
supposed to be complementary; if both fail, it's because there is
nothing to match. Yet . matches.

(By the way, you may want to fix a trivial typo in a doc string in
rx.el while you are at it: `indian-tow-byte')







^ permalink raw reply	[flat|nested] 17+ messages in thread

end of thread, other threads:[~2018-12-29 14:55 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-10-30 15:03 bug#33205: 26.1; unibyte/multibyte missing in rx.el Mattias Engdegård
2018-10-30 17:27 ` Eli Zaretskii
2018-10-31 15:27   ` Mattias Engdegård
2018-10-31 15:55     ` Eli Zaretskii
2018-11-05 16:49       ` Eli Zaretskii
2018-11-07 18:08         ` Mattias Engdegård
2018-11-07 19:10           ` Eli Zaretskii
2018-11-07 20:19             ` Mattias Engdegård
2018-11-19 20:07             ` Mattias Engdegård
2018-12-08  8:56               ` Eli Zaretskii
2018-12-08  9:23                 ` Mattias Engdegård
2018-12-08 11:11                   ` Eli Zaretskii
2018-12-28 18:17                 ` Mattias Engdegård
2018-12-29  9:24                   ` Eli Zaretskii
2018-12-29  9:23               ` Eli Zaretskii
2018-12-29 10:43                 ` Mattias Engdegård
2018-12-29 14:55                   ` Eli Zaretskii

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