From: Stefan Monnier <monnier@iro.umontreal.ca>
To: HaiJun Zhang <netjune@outlook.com>
Cc: Eli Zaretskii <eliz@gnu.org>,
alan@idiocy.org, arthur miller <arthur.miller@live.com>,
emacs-devel@gnu.org
Subject: Re: Using incremental parsing in Emacs
Date: Mon, 06 Jan 2020 08:47:31 -0500 [thread overview]
Message-ID: <jwvsgks1z7z.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <PS1PR03MB36060410DC7A6FB19455DC6AB73C0@PS1PR03MB3606.apcprd03.prod.outlook.com> (HaiJun Zhang's message of "Mon, 6 Jan 2020 12:39:02 +0800")
> I see the buffer is fontified correctly. Does it parse the whole buffer?
We have different levels of parsing. At the bottom we have
`syntax-ppss` (whose workhorse, implemented in C, is
`parse-partial-sexp`) which only counts parentheses and looks for
comment and string markers. In the above case, `syntax-ppss` indeed
parses the whole buffer, but given its limited scope this parsing is
usually fast (it can be slow in some cases, because `parse-partial-sexp`
is supplemented by `syntax-propertize-function` to handle the "unusual"
cases of "strings/comments" (a typical example would be here-documents
in shell scripts) and this is all implemented in Elisp using regexp
searches).
After this parsing is done, font-lock looks at the few lines actually
displayed using its Elisp/regexps rules to apply the actual highlighting.
This may look at more parts of the buffer, tho, depending on the actual
font-lock rules.
Stefan
next prev parent reply other threads:[~2020-01-06 13:47 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-03 10:05 Using incremental parsing in Emacs Eli Zaretskii
2020-01-03 13:36 ` phillip.lord
2020-01-03 14:24 ` Eli Zaretskii
2020-01-03 15:43 ` arthur miller
2020-01-03 16:00 ` Dmitry Gutov
2020-01-03 17:09 ` Pankaj Jangid
2020-01-03 19:39 ` Stephen Leake
2020-01-03 20:05 ` Eli Zaretskii
2020-01-03 22:21 ` arthur miller
2020-01-04 3:46 ` HaiJun Zhang
2020-01-04 8:23 ` Eli Zaretskii
2020-01-03 23:53 ` Stephen Leake
2020-01-04 8:45 ` Eli Zaretskii
2020-01-04 14:05 ` arthur miller
2020-01-04 19:26 ` Stephen Leake
2020-01-04 19:54 ` Eli Zaretskii
2020-01-05 17:05 ` Stephen Leake
2020-01-05 19:14 ` yyoncho
2020-01-05 22:44 ` Dmitry Gutov
2020-01-04 3:59 ` HaiJun Zhang
[not found] ` <41b3e9a0-2866-4692-a35c-6d9541bc3aaa@Spark>
2020-01-04 4:57 ` HaiJun Zhang
2020-01-04 8:55 ` Eli Zaretskii
2020-01-04 12:50 ` VanL
2020-01-04 13:22 ` arthur miller
2020-01-04 23:47 ` Replacing all C code???? Richard Stallman
2020-01-05 3:35 ` VanL
2020-01-05 22:19 ` Richard Stallman
2020-01-05 5:01 ` Stefan Monnier
2020-01-05 16:58 ` Fangrui Song
2020-01-05 22:18 ` Richard Stallman
2020-01-05 22:25 ` Stefan Monnier
2020-01-07 2:34 ` VanL
2020-01-04 13:30 ` Using incremental parsing in Emacs arthur miller
2020-01-04 13:42 ` Dmitry Gutov
2020-01-04 14:46 ` arthur miller
2020-01-05 14:50 ` Alan Third
2020-01-05 15:16 ` arthur miller
2020-01-05 15:29 ` Eli Zaretskii
2020-01-05 15:31 ` Eli Zaretskii
2020-01-05 17:11 ` Stephen Leake
2020-01-09 21:56 ` Dmitry Gutov
2020-01-10 7:41 ` Eli Zaretskii
2020-01-11 1:41 ` Dmitry Gutov
2020-01-11 7:53 ` Eli Zaretskii
2020-01-11 12:24 ` Dmitry Gutov
2020-01-11 12:29 ` Eli Zaretskii
2020-01-04 20:26 ` Yuan Fu
2020-01-04 20:43 ` Stefan Monnier
2020-01-05 14:19 ` Alan Third
2020-01-05 17:07 ` Stephen Leake
2020-01-05 19:16 ` Alan Third
2020-01-05 17:09 ` Stefan Monnier
2020-01-05 18:22 ` Eli Zaretskii
2020-01-05 19:18 ` Stefan Monnier
2020-01-05 19:36 ` Eli Zaretskii
2020-01-05 20:27 ` Stefan Monnier
2020-01-05 21:12 ` yyoncho
2020-01-05 22:10 ` Stefan Monnier
2020-01-05 23:08 ` yyoncho
2020-01-06 3:39 ` Eli Zaretskii
2020-01-05 19:23 ` arthur miller
2020-01-05 19:40 ` Eli Zaretskii
2020-01-05 20:28 ` arthur miller
2020-01-06 3:42 ` Eli Zaretskii
2020-01-06 4:39 ` HaiJun Zhang
2020-01-06 5:33 ` Eli Zaretskii
2020-01-06 5:55 ` HaiJun Zhang
2020-01-06 6:11 ` Eli Zaretskii
2020-01-06 16:45 ` arthur miller
2020-01-07 16:19 ` Eli Zaretskii
2020-01-06 13:47 ` Stefan Monnier [this message]
2020-01-06 16:36 ` HaiJun Zhang
2020-01-06 16:48 ` arthur miller
2020-01-06 16:14 ` Anand Tamariya
[not found] <1504933445.581219.1569619792280.ref@mail.yahoo.com>
2019-09-27 21:29 ` Where to place third-party C source code? Jorge Araya Navarro
2019-09-28 6:31 ` Eli Zaretskii
2019-09-28 7:33 ` Jorge Javier Araya Navarro
2019-09-28 12:54 ` Stefan Monnier
2019-12-26 16:52 ` yyoncho
2020-01-04 3:25 ` Using incremental parsing in Emacs HaiJun Zhang
2020-01-04 5:21 ` Tobias Bading
2020-01-04 23:48 ` Richard Stallman
2020-01-05 3:36 ` Eli Zaretskii
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