From: Stephen Leake <stephen_leake@stephe-leake.org>
To: emacs-devel <emacs-devel@gnu.org>
Subject: Re: scratch/fontify-open-string. [Was: CC Mode and electric-pair "problem".]
Date: Mon, 16 Jul 2018 22:41:19 -0500 [thread overview]
Message-ID: <864lgysf4w.fsf@stephe-leake.org> (raw)
In-Reply-To: <20180715165658.GB4897@ACM> (Alan Mackenzie's message of "Sun, 15 Jul 2018 16:56:58 +0000")
Alan Mackenzie <acm@muc.de> writes:
> Hello, Stephen.
>
> Many thanks for trying out and testing this branch.
You're welcome; thanks for implementing it.
> I'm afraid I've found a rather large snag - there are backward moving
> commands and functions in Emacs which bypass proper syntax checking.
> For example, in the following in (the modified) shell-script-mode:
>
> 1. foo="Foo"
> 2. bar="Bar
> 3.
>
> , with point at BOL3, a C-M-b moves to the F, rather than "Bar.
>
> This is because (forward-comment -1) crashes into the "whitespace" at
> the end of L2 (the newline) rather than taking account of its syntax
> (the string closing flag).
>
> At the very least, the function back_comment (in src/syntax.c) will need
> to be modified to take account of such things, and in doing so, might as
> well become a function that also goes back over EOL-terminated strings,
> as Stefan suggested. This will be a lot of work.
>
> I fear there may be several, or even many, lisp functions in Emacs which
> may likewise need modifying.
>
> The root cause of this problem, in the abstract, is that Emacs attempts
> to scan backwards over strings and comments, which is only heuristically
> possible, rather than scanning forwards over the same constructs and
> remembering the endpoints.
>
> Right at the moment, I don't know how to proceed. Sorry.
I think you are opposed to syntax-ppss, but that does scan forward and
remember things; can we use that here?
--
-- Stephe
next prev parent reply other threads:[~2018-07-17 3:41 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-22 7:42 [Emacs-diffs] master bb591f139f: Enhance CC Mode's fontification, etc., of unterminated strings Tino Calancha
2018-05-22 17:40 ` Alan Mackenzie
2018-05-22 19:21 ` João Távora
2018-05-22 19:34 ` Eli Zaretskii
2018-05-22 20:25 ` João Távora
2018-05-22 22:17 ` João Távora
2018-05-23 14:52 ` Eli Zaretskii
2018-05-23 20:46 ` Alan Mackenzie
2018-05-23 21:12 ` João Távora
2018-05-23 23:21 ` Michael Welsh Duggan
2018-05-31 12:37 ` CC Mode and electric-pair "problem". (Was: ... master bb591f139f: Enhance CC Mode's fontification, etc., of unterminated strings.) Alan Mackenzie
2018-05-31 16:07 ` CC Mode and electric-pair "problem" João Távora
2018-05-31 17:28 ` Alan Mackenzie
2018-05-31 18:37 ` João Távora
2018-06-02 13:02 ` Alan Mackenzie
2018-06-03 3:00 ` João Távora
2018-06-17 16:58 ` Glenn Morris
2018-06-17 20:13 ` Alan Mackenzie
2018-06-17 21:07 ` Stefan Monnier
2018-06-17 21:27 ` João Távora
2018-06-18 10:36 ` Alan Mackenzie
2018-06-18 13:24 ` João Távora
2018-06-18 15:18 ` Eli Zaretskii
2018-06-18 15:37 ` João Távora
2018-06-18 16:46 ` Eli Zaretskii
2018-06-18 17:21 ` Eli Zaretskii
2018-06-18 23:49 ` João Távora
2018-06-19 2:37 ` Eli Zaretskii
2018-06-19 8:13 ` João Távora
2018-06-19 16:59 ` Eli Zaretskii
2018-06-19 19:40 ` João Távora
2018-06-18 20:24 ` Glenn Morris
2018-06-19 2:03 ` João Távora
2018-06-18 15:42 ` Alan Mackenzie
2018-06-18 17:01 ` João Távora
2018-06-18 18:07 ` Yuri Khan
2018-06-18 22:52 ` João Távora
2018-06-18 18:08 ` Alan Mackenzie
2018-06-18 23:43 ` João Távora
2018-06-19 1:35 ` João Távora
2018-06-19 1:48 ` Stefan Monnier
2018-06-19 3:52 ` Clément Pit-Claudel
2018-06-19 6:38 ` Stefan Monnier
2018-06-20 13:48 ` Clément Pit-Claudel
2018-06-26 16:08 ` Fontifying unterminated strings [was: CC Mode and electric-pair "problem".] Alan Mackenzie
2018-06-26 20:02 ` João Távora
2018-06-28 23:56 ` Stefan Monnier
2018-06-29 0:43 ` Stefan Monnier
2018-06-18 22:41 ` CC Mode and electric-pair "problem" Stephen Leake
2018-06-19 0:02 ` João Távora
2018-06-19 3:15 ` Clément Pit-Claudel
2018-06-19 8:16 ` João Távora
2018-06-19 5:02 ` Alan Mackenzie
2018-06-20 14:16 ` Stefan Monnier
2018-06-26 18:23 ` Alan Mackenzie
2018-06-27 13:37 ` João Távora
2018-06-29 3:42 ` Stefan Monnier
2018-06-30 18:09 ` Alan Mackenzie
2018-07-01 3:37 ` Stefan Monnier
2018-07-01 15:24 ` Eli Zaretskii
2018-07-06 21:58 ` Stephen Leake
2018-07-01 15:57 ` Paul Eggert
2018-06-27 18:27 ` Alan Mackenzie
2018-06-29 4:11 ` Stefan Monnier
2018-06-30 19:03 ` Alan Mackenzie
2018-06-30 19:29 ` Eli Zaretskii
2018-06-30 20:14 ` Alan Mackenzie
2018-07-01 3:50 ` Stefan Monnier
2018-07-01 9:58 ` Alan Mackenzie
2018-07-01 11:22 ` João Távora
2018-07-01 15:25 ` Eli Zaretskii
2018-07-01 15:22 ` Eli Zaretskii
2018-07-01 16:38 ` scratch/fontify-open-string. [Was: CC Mode and electric-pair "problem".] Alan Mackenzie
2018-07-08 8:29 ` Stephen Leake
2018-07-15 9:00 ` Stephen Leake
2018-07-15 15:13 ` Eli Zaretskii
2018-07-15 18:45 ` Alan Mackenzie
2018-07-16 2:23 ` Indentation of ?: in C-mode (was: scratch/fontify-open-string. [Was: CC Mode and electric-pair "problem".]) Stefan Monnier
2018-07-16 14:18 ` Eli Zaretskii
2018-07-16 15:54 ` Indentation of ?: in C-mode Stefan Monnier
2018-07-15 16:56 ` scratch/fontify-open-string. [Was: CC Mode and electric-pair "problem".] Alan Mackenzie
2018-07-17 3:41 ` Stephen Leake [this message]
2018-07-01 4:02 ` CC Mode and electric-pair "problem" Stefan Monnier
2018-07-01 10:58 ` Alan Mackenzie
2018-07-01 11:46 ` João Távora
2018-07-01 16:13 ` Stefan Monnier
2018-07-01 18:18 ` Alan Mackenzie
2018-07-01 23:16 ` Stefan Monnier
2018-07-02 19:18 ` Alan Mackenzie
2018-07-03 2:10 ` Stefan Monnier
2018-06-26 18:52 ` Alan Mackenzie
2018-06-26 19:45 ` João Távora
2018-06-26 20:09 ` Alan Mackenzie
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