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bug#64204: C/C++ local variables not syntax highlighted if they start wi
From: |
Alan Mackenzie |
Subject: |
bug#64204: C/C++ local variables not syntax highlighted if they start with $ |
Date: |
Thu, 22 Jun 2023 09:11:38 +0000 |
Hello, Eli.
On Thu, Jun 22, 2023 at 07:50:47 +0300, Eli Zaretskii wrote:
> > Cc: acm@muc.de, 64204@debbugs.gnu.org
> > Date: Wed, 21 Jun 2023 21:06:37 +0000
> > From: Alan Mackenzie <acm@muc.de>
> > Apologies, the patch I sent earlier was defective, not applying cleanly
> > to the Emacs master branch. I also should have sent the patch as an
> > attachment.
> > I'm now sending the patch as attachment. It should apply cleanly to the
> > master branch or emacs-29.
> Thanks, but shouldn't this be optional behavior, which users should be
> able to control? Standard C disallows '$' in identifiers AFAIK, and
> some users might wish to follow the Standard.
The thing is, such an option would be difficult to implement. At the
moment, c-symbol-start and c-symbol-key (regular expressions which match
the start of an identifier and all of one) are calculated in cc-langs.el
at compilation time. They are widely used (~40 times) in the indentation
engine and fontification.
It would be necessary to change these constants to variables, probably
doubling the number of relevant c-lang-const's in cc-langs.el, and to add
a mechanism to toggle between them at run time.
I don't feel that the benefit from this new option would really be worth
the work it would take to implement. I don't think people are going to
be putting $ signs at the start of identifiers by accident. CC Mode has
always fontified $s in the middle (or at the end) of identifiers, and
this doesn't seem to have caused problems.
--
Alan Mackenzie (Nuremberg, Germany).
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, (continued)
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Eli Zaretskii, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Po Lu, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Eli Zaretskii, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Po Lu, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Eli Zaretskii, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Po Lu, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Eli Zaretskii, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Po Lu, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Eli Zaretskii, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Po Lu, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $,
Alan Mackenzie <=
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Eli Zaretskii, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Alan Mackenzie, 2023/06/22
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Alan Mackenzie, 2023/06/28
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Eli Zaretskii, 2023/06/28
- bug#64204: C/C++ local variables not syntax highlighted if they start with $, Joseph Garvin, 2023/06/29