bug#62951: 29.0.90; c-ts-mode: Incorrect fontification due to FOR_EACH_TAIL_SAFE

[Yuan Fu]

> On Apr 27, 2023, at 10:41 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> From: Yuan Fu <casouri@gmail.com>
>> Date: Thu, 27 Apr 2023 12:56:07 -0700
>> Cc: dmitry@gutov.dev,
>> 62951@debbugs.gnu.org
>> 
>>> c-ts-mode: Cannot load language definition: not-found, 
>>> ("libtree-sitter-emacs-c" "libtree-sitter-emacs-c.dll"), "No such file or 
>>> directory"
>>> 
>>> It looks like your "fake emacs-c language" trick somehow misfires?
>>> The value of treesit-load-name-override-list is nil, which is not what
>>> you intended, AFAICT?  The only way I can make this work is by
>>> manually customizing treesit-load-name-override-list before loading
>>> c-ts-mode.
>> 
>> Duh, sorry, dumb mistake. Fixed.
> 
> Thanks.
> 
>>> Otherwise, looks quite good; here are some other problems I found:
>>> 
>>> . some uses of FOR_EACH_TAIL are not fontified at all; examples:
>>>   comp.c, line 2079, fns.c, line 189
>> 
>> You mean the FOE_EACH_TAIL part isn’t fontified, or the body isn’t 
>> fontified? Because the body are always fontified here. FOR_EACH_TAIL itself 
>> shouldn’t be fontified since it’s just a macro call and a variable.
> 
> I mean the macro itself, FOR_EACH_TAIL.  If it isn't supposed to be
> fontified, then why is it fontified at line 856 of comp.c?  It's
> inconsistent.  (However, this is a very minor problem, so if fixing
> it is difficult, we can leave this alone for now.)

Ah, I see. FOR_EACH_TAIL’s that has a bracketed body are not skipped and still 
have fontification on them. I pushed a change so that no one has fontification 
now. Also thanks for the doc fix :-)

Yuan