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

[Yuan Fu]

> On Apr 27, 2023, at 8:03 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> From: Yuan Fu <casouri@gmail.com>
>> Date: Wed, 26 Apr 2023 20:14:45 -0700
>> Cc: Eli Zaretskii <eliz@gnu.org>,
>> 62951@debbugs.gnu.org
>> 
>> Ok, here’s the patch. Eli, would you give it a try?
> 
> It signals an error when I enable c-ts-mode:
> 
>  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.

> 
> 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.

>  . FOR_EACH_LIVE_BUFFER (data.c, line 1430) is not recognized?
>  . FOR_EACH_FRAME (keyboard.c, line 1256) is not recognized?

Didn’t know that they exited :-) Now I have FOR_EACH_TAIL, FOR_EACH_TAIL_SAFE, 
FOR_EACH_ALIST_VALUE, FOR_EACH_LIVE_BUFFER, FOR_EACH_FRAME.

> 
> This is much better than before already, so I think you should install
> this on the emacs-29 branch, once you fix the above problems (assuming
> they are easily fixable).

Cool, I pushed the change.

Yuan