unofficial mirror of emacs-devel@gnu.org 
 help / color / mirror / code / Atom feed
From: Daniele Nicolodi <daniele@grinta.net>
To: emacs-devel@gnu.org
Subject: Re: Different fontification in temp buffer
Date: Sat, 19 Jan 2019 19:14:03 -0700	[thread overview]
Message-ID: <240a311e-ec17-8c91-74c1-d30fd4da2809@grinta.net> (raw)
In-Reply-To: <36cc3b65-2459-bf32-37f1-2bd538fafe07@grinta.net>

On 19/01/2019 17:48, Daniele Nicolodi wrote:
> Hello,
> 
> I'm hacking on a minor mode and I'm writing unit tests for the
> fontification feature. I am encountering a strange issue: the
> fontification is different if execute in a temp buffer or in a regular
> buffer. In particular:
> 
>   (with-temp-buffer
>     (insert string)
>     (fundamental-mode)
>     (beancount-mode)
>     (font-lock-ensure)
>     (buffer-string))
> 
> and
> 
>   (with-current-buffer (generate-new-buffer "*test*")
>     (insert string)
>     (fundamental-mode)
>     (beancount-mode)
>     (font-lock-ensure)
>     (buffer-string))
> 
> strangely result in two different results. Why is it so?

Investigating further, the difference between the two cases is that
with-temp-buffer creates a buffer that does not keep undo information.
Surely enough, if I modify the second code to do the same (using a
buffer name starting with a space character) I obtain the same behavior.

What's left to understand is why this results in two different syntax
table being applied to the buffer.

Cheers,
Dan



  reply	other threads:[~2019-01-20  2:14 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-20  0:48 Different fontification in temp buffer Daniele Nicolodi
2019-01-20  2:14 ` Daniele Nicolodi [this message]
2019-01-20 13:57   ` Noam Postavsky
2019-01-20 15:55     ` Daniele Nicolodi
2019-01-20 17:56       ` Noam Postavsky
2019-01-20 18:32         ` Daniele Nicolodi
2019-01-21  2:51 ` Stefan Monnier

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

  List information: https://www.gnu.org/software/emacs/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=240a311e-ec17-8c91-74c1-d30fd4da2809@grinta.net \
    --to=daniele@grinta.net \
    --cc=emacs-devel@gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).