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From: Alan Mackenzie <acm@muc.de>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: CC Mode and electric-pair "problem".
Date: Tue, 26 Jun 2018 18:23:48 +0000	[thread overview]
Message-ID: <20180626182348.GB4464@ACM> (raw)
In-Reply-To: <jwv7emtbmap.fsf-monnier+gmane.emacs.devel@gnu.org>

Hello, Stefan.

On Wed, Jun 20, 2018 at 10:16:05 -0400, Stefan Monnier wrote:

[ .... ]

> If the purpose of the change is to address use cases such as Clément's:
> > Sorry for jumping in a bit late.  Does that mean that after the changed an
> > unclosed quote will only cause refontification up to the end of the line?
> > That would be a very nice improvement.  I don't use electric-pair-mode, and
> > as things currently stand inserting an unmatched quote applies
> > font-lock-string-face to the entire buffer, which is a bit annoying.

> How 'bout taking an approach that will have much fewer side-effects:
> Instead of adding the complexity at the low-level of syntax-tables
> to make strings "magically" terminate at EOL, hook into
> self-insert-command:

>     when inserting a ", add a matching " at EOL if needed, or remove
>     the " that we added at EOL earlier.

> Something like (guaranteed 100% tested, of course.  No animals were harmed):

>     (add-hook 'post-self-insert-hook
>         (lambda ()
>           (when (memq last-command-event '(?\" ?\'))
>             (save-excursion
>               (let ((pos (point))
>                     (ppss (syntax-ppss (line-end-position))))
>                 (when (and (nth 3 ppss)        ;; EOL within a string
>                            (not (nth 5 ppss))) ;; EOL not escaped
>                   (if (and (> (point) pos)
>                            (eq last-command-event (char-before)))
>                       ;; Remove extraneous unmatched " at EOL.
>                       (delete-region (1- (point)) (point))
>                     (insert last-command-event)))))))
>         'append 'local)

This is effectively electric-pair-mode, which if enabled, already
inserts two "s when you type ".

Not everybody likes electric-pair-mode.  I don't think your suggestion
is any better than mine (snipped) to which you replied.

> I used `append` to try and make it interact better with electric-pair-mode.


>         Stefan

-- 
Alan Mackenzie (Nuremberg, Germany).



  reply	other threads:[~2018-06-26 18:23 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 [this message]
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
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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