From: Drew Adams <drew.adams@oracle.com>
To: Noam Postavsky <npostavs@gmail.com>,
Eric Abrahamsen <eric@ericabrahamsen.net>
Cc: 31584@debbugs.gnu.org
Subject: bug#31584: 27.0.50; Document again what match re-search-backward finds
Date: Thu, 24 May 2018 17:28:54 -0700 (PDT) [thread overview]
Message-ID: <876a63cb-5e6d-4203-9284-b17e870c484c@default> (raw)
In-Reply-To: <87wovsg0q3.fsf@gmail.com>
> It is greedy:
> (with-temp-buffer
> (insert "xxxxyyyy")
> (and (re-search-backward "x+y*" nil t) (match-string 0))) ;=> "xyyyy"
>
> Non-greedy wouldn't match any "y"s. It's a bit tricky to explain both
> correctly and clearly...
Maybe it would help to say that the pattern is always matched in a forward direction, even when it matches text that is before point.
The pattern itself is not read backward (you don't write +x*y
for the reverse search of x+y*), and it doesn't match backward.
prev parent reply other threads:[~2018-05-25 0:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-24 21:31 bug#31584: 27.0.50; Document again what match re-search-backward finds Michael Heerdegen
2018-05-24 21:42 ` Eric Abrahamsen
2018-05-24 21:59 ` Michael Heerdegen
2018-05-24 22:10 ` Eric Abrahamsen
2018-05-24 22:14 ` Noam Postavsky
2018-05-24 22:47 ` Eric Abrahamsen
2018-05-24 22:47 ` Michael Heerdegen
2018-05-24 23:55 ` Noam Postavsky
2018-05-25 0:22 ` Michael Heerdegen
2018-05-25 0:31 ` Noam Postavsky
2018-05-25 0:36 ` Eric Abrahamsen
2018-05-25 1:10 ` Michael Heerdegen
2018-05-25 1:27 ` Noam Postavsky
2018-05-25 1:48 ` Michael Heerdegen
2018-05-25 6:23 ` Eli Zaretskii
2018-05-25 11:59 ` Noam Postavsky
2018-05-25 0:28 ` Drew Adams [this message]
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