bug#46416: 27.1; syntax-propertize fails in mhtml-mode

bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Leo Liu]

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1. emacs -q -l test.el
2. Create a new buffer in mhtml-mode
3. Add the following two lines:

   %%var1%%
   "%%var2%%"

4. Inspect the syntax of the % char (C-u C-x =) on both lines

% in double quotes has word syntax which seems unexpected.

If we do something similar in Emacs 26 both % chars have punctuation
syntax.


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bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Dmitry Gutov]

On 10.02.2021 03:40, Leo Liu wrote:
> 1. emacs -q -l test.el
> 2. Create a new buffer in mhtml-mode
> 3. Add the following two lines:
> 
>     %%var1%%
>     "%%var2%%"
> 
> 4. Inspect the syntax of the % char (C-u C-x =) on both lines
> 
> % in double quotes has word syntax which seems unexpected.
> 
> If we do something similar in Emacs 26 both % chars have punctuation
> syntax.

I can't seem to be able to reproduce your scenario in Emacs 28 (in fact, 
I get %var1 and %var2 highlighted as variables), but it might be related 
to the

   "\\([\"']\\)[^\"'<>]*"

rule in sgml-syntax-propertize-rules.

If you could double-check the expected and actual behaviors in the 
current master, though, that would be great.

bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Leo Liu]

On 2021-02-14 03:25 +0200, Dmitry Gutov wrote:
> I can't seem to be able to reproduce your scenario in Emacs 28 (in
> fact, I get %var1 and %var2 highlighted as variables), but it might be
> related to the
>
>   "\\([\"']\\)[^\"'<>]*"
>
> rule in sgml-syntax-propertize-rules.

Yes I can confirm it's this rule that seems to remove syntax-table
property that has been applied by preceding rules.

I can reproduce this bug by simplifying the said rule to

  ("\\([\"']\\)[^\"'<>]*" (1 "."))

> If you could double-check the expected and actual behaviors in the
> current master, though, that would be great.

Unfortunately I don't have emacs 28 at hand so cannot test immediately.

bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Lars Ingebrigtsen]

Leo Liu <sdl.web@gmail.com> writes:

> 1. emacs -q -l test.el
> 2. Create a new buffer in mhtml-mode
> 3. Add the following two lines:
>
>    %%var1%%
>    "%%var2%%"
>
> 4. Inspect the syntax of the % char (C-u C-x =) on both lines
>
> % in double quotes has word syntax which seems unexpected.

I'm unable to reproduce this -- all the % signs have

  general-category: Po (Punctuation, Other)

syntax, as far as I can tell (both in Emacs 27.1 and 29).  So I seem to
be unable to reproduce this problem.  Are you still seeing this in
recent Emacs versions, and if so, do you have a complete recipe to
reproduce it?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Leo Liu]

> I'm unable to reproduce this -- all the % signs have
> 
>  general-category: Po (Punctuation, Other)
> 
> syntax, as far as I can tell (both in Emacs 27.1 and 29).  So I seem to
> be unable to reproduce this problem.  Are you still seeing this in
> recent Emacs versions, and if so, do you have a complete recipe to
> reproduce it?
> 

I tested the bug again in emacs 28.1 nothing seems to have changed 

               syntax: w 	which means: word

Leo

bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Lars Ingebrigtsen]

Leo Liu <sdl.web@gmail.com> writes:

>> I'm unable to reproduce this -- all the % signs have
>> 
>>  general-category: Po (Punctuation, Other)
>> 
>> syntax, as far as I can tell (both in Emacs 27.1 and 29).  So I seem to
>> be unable to reproduce this problem.  Are you still seeing this in
>> recent Emacs versions, and if so, do you have a complete recipe to
>> reproduce it?
>> 
>
> I tested the bug again in emacs 28.1 nothing seems to have changed 
>
>                syntax: w 	which means: word

Do you have a complete recipe, starting from "emacs -Q", to reproduce
this?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Leo Liu]

On 2022-06-23 10:43 +0200, Lars Ingebrigtsen wrote:
> Do you have a complete recipe, starting from "emacs -Q", to reproduce
> this?

That's what I did following step by step in the bug report. However I
noticed you were posting from the subheading "Character code properties"
in the output of C-u C-x =. I was taking the output from the top under
key "syntax:". Is this causing the confusion?

Leo

bug#46416: 27.1; syntax-propertize fails in mhtml-mode

[Lars Ingebrigtsen]

Leo Liu <sdl.web@gmail.com> writes:

> That's what I did following step by step in the bug report. However I
> noticed you were posting from the subheading "Character code properties"
> in the output of C-u C-x =. I was taking the output from the top under
> key "syntax:". Is this causing the confusion?

Oh, you mean this?

               syntax: w 	which means: word

Yes, I can reproduce that.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no