bug#60296: The imenu is not created properly in c-ts-mode

[Yuan Fu]

> On Dec 25, 2022, at 11:58 PM, e190@163.com wrote:
> 
> >> On Dec 24, 2022, at 10:53 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> >>
> >>> Cc: 60296-done@debbugs.gnu.org
> >>> From: Yuan Fu <casouri@gmail.com>
> >>> Date: Sat, 24 Dec 2022 19:00:21 -0800
> >>>
> >>>> From: sniper <e190@163.com>
> >>>> To: bug-gnu-emacs@gnu.org
> >>>> Subject: 29.0.60; The imenu is not created properly in c-ts-mode.
> >>>>
> >>>> ``` c
> >>>> char *test(int size){
> >>>> return NULL;
> >>>> }
> >>>> ```
> >>>> If c-ts-mode is enabled in a c file, the imenu created will be [` 
> >>>> test(int size)`] if the return type of the function is a
> >>>> pointer.
> >>>> The expected display should just be the function name [` test `], with 
> >>>> no subsequent arguments
> >>>
> >>> Thanks, this should be fixed now.
> >>
> >> This change leads to
> >>
> >>  In c-ts-mode--fontify-declarator:
> >>  progmodes/c-ts-mode.el:405:69: Warning: Unused lexical argument `args'
> >>
> >> And "&rest args" is indeed unused there, AFAICT.
>  
> >My bad. I’ve fixed that by changing args to _.
> Hi, Yuan:
> 
> I tested it in the latest version and found several more issues.
> ``` c
> int main(int argc, char *argv[])
> {
> .....
>    struct name_t name = (struct name_t)name;
>    name.a = sizeof(struct name_t);
> .....
> }
> ```
> If Forced conversion or ` sizeof(struct name_t) ` occurs in a function, it 
> will occur in the Struct entry of imenu.
> 
> 
> ``` c
> int func_1(int v);  //  <-- function declaration
> int main(int argc, char *argv[])
> {
> }
> ```
> If there is a function declaration in the c file, it will also appear in 
> imenu's Variable entry.

Thanks, I fixed those. Further more, I improved the whole imenu thing in 
c-ts-mode and it should be robust now.

Yuan