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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Dmitry Gutov <dgutov@yandex.ru>
Cc: Yuan Fu <casouri@gmail.com>, Emacs developers <emacs-devel@gnu.org>
Subject: Re: Add some aliases for re-related functions
Date: Sat, 02 May 2020 18:49:44 -0400	[thread overview]
Message-ID: <jwv8siaklhy.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <1f156067-9bf3-e588-4306-9d673a2a27b9@yandex.ru> (Dmitry Gutov's message of "Sun, 3 May 2020 01:10:30 +0300")

>> [ I'm trying to use "search" and "match" in the way it's used in
>>    traditional regexp libraries.  ]
> Guess I'm unfamiliar with said libraries. I'd suggest re-looking-at and
> re-looking-back (or whatever, like, don't create an alias for the last 
> one if we don't want to).

Most of the literature on regular expressions concentrates on the
problem of finding whether a given string matches a given regexp, where
"matching" here means that the regexp matches the whole string.

Think of it as the case where the regexp starts with \` and ends with \'

Then there's the relaxation of "finding the longest match" (what we
call `looking-at`) and then "finding the leftmost longest match" (what
we call `string-match`).

Those two have traditionally be named `re_match` and `re_search`
respectively in C libraries (as can be seen in `src/regexp-emacs.c`).


        Stefan


PS: BTW, `looking-back` doesn't do a "match" of the "longest match that
ends at point" but a "search" for the "rightmost longest match that ends
at point" since it uses `re-search-backward` internally.




  parent reply	other threads:[~2020-05-02 22:49 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-02 18:28 Add some aliases for re-related functions Yuan Fu
2020-05-02 18:39 ` Eli Zaretskii
2020-05-02 18:43   ` Yuan Fu
2020-05-02 21:21   ` Stefan Monnier
2020-05-02 22:27     ` Drew Adams
2020-05-03  8:33       ` Michael Albinus
2020-05-03 19:07         ` Drew Adams
2020-05-02 19:29 ` Alan Mackenzie
2020-05-02 19:48   ` Yuan Fu
2020-05-02 20:10   ` Philippe Vaucher
2020-05-02 20:13     ` Philippe Vaucher
2020-05-03 14:16       ` Eli Zaretskii
2020-05-04  3:09         ` Richard Stallman
2020-05-04 14:28           ` Eli Zaretskii
2020-05-04 17:12             ` Dmitry Gutov
2020-05-04 17:35               ` Eli Zaretskii
2020-05-04 17:42                 ` Dmitry Gutov
2020-05-04 17:46                   ` Eli Zaretskii
2020-05-04 17:53                     ` Dmitry Gutov
2020-05-02 21:09     ` Alan Mackenzie
2020-05-02 21:51       ` Philippe Vaucher
2020-05-03  9:43         ` Alan Mackenzie
2020-05-03 15:00           ` 조성빈
2020-05-02 22:41       ` Stefan Monnier
2020-05-03 17:14         ` Alan Mackenzie
2020-05-04 10:07       ` João Távora
2020-05-03 14:16     ` Eli Zaretskii
2020-05-03 16:20       ` Yuri Khan
2020-05-03 16:42         ` Eli Zaretskii
2020-05-03 16:50           ` Dmitry Gutov
2020-05-02 21:33 ` Stefan Monnier
2020-05-02 22:10   ` Dmitry Gutov
2020-05-02 22:18     ` Eric Abrahamsen
2020-05-02 22:49     ` Stefan Monnier [this message]
2020-05-02 23:13       ` Dmitry Gutov
2020-05-03  3:55         ` Stefan Monnier
2020-05-04  0:29           ` Dmitry Gutov
2020-05-04  3:11             ` Stefan Monnier
2020-05-02 22:44   ` Drew Adams
2020-05-03  3:26     ` Stefan Monnier
2020-05-03  4:37       ` Drew Adams
2020-05-03  8:05         ` Philippe Vaucher
2020-05-03  9:55           ` Alan Mackenzie
2020-05-03 10:26             ` tomas
2020-05-03 15:15             ` Eli Zaretskii
2020-05-03 19:47           ` Drew Adams
2020-05-04  7:32             ` Philippe Vaucher
2020-05-04  8:20               ` Sending plaintext with Gmail (was: Add some aliases for re-related functions) Kévin Le Gouguec
2020-05-04  8:45                 ` Philippe Vaucher
2020-05-04 15:09                 ` Sending plaintext with Gmail Stefan Monnier
2020-05-04 15:25                   ` Kévin Le Gouguec
2020-05-04 15:29                     ` Lars Ingebrigtsen
2020-05-05  8:13                       ` HTML display in Gnus (was: Sending plaintext with Gmail) Kévin Le Gouguec
2020-05-05  8:24                         ` HTML display in Gnus Lars Ingebrigtsen
2020-05-05  9:26                           ` Kévin Le Gouguec
2020-07-17 17:14                           ` Kévin Le Gouguec
2020-05-04 15:39                     ` Sending plaintext with Gmail Andreas Schwab
2020-05-04 16:51               ` Add some aliases for re-related functions Drew Adams
2020-05-04 17:10               ` Drew Adams
2020-05-04 18:17                 ` Philippe Vaucher
2020-05-04 18:33                   ` Drew Adams
2020-05-05  2:48             ` Richard Stallman
2020-05-04  3:08         ` Richard Stallman
2020-05-04 10:16       ` João Távora
2020-05-04  3:04 ` Richard Stallman

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