bug#61208: 29.0.60; treesit-beginning/end-of-defun problem with macros in c-ts-mode

[Eli Zaretskii]

> Cc: yang.yingchao@qq.com
> Date: Wed, 01 Feb 2023 14:33:24 +0800
> From:  Yang Yingchao via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> 
> #define SWITCH()
> #define CASE(name)            case name:
> 
> void func(int i)        // LINE_E
> {
>     SWITCH(i)           // LINE_D
>     {
>         CASE(A)         // LINE_C
>         {
>             ;
>         }
>         CASE(B)         // LINE_B
>         {
>             ;           // LINE_A
>         }
>     }
> }
> 
> When cursor is at LINE_A, and stoke `C-M-a`, cursor will go to LINE_B;
> then `C-M-a` again, cursor goes to LINE_C, then `C-M-a` again, LINE_D,
> and `C-M-a` again, finally to LINE_E...

Set treesit-defun-tactic to 'top-level, and your problem is solved.

Yuan, Theo: do we want to have that set by default in ts-c-mode?  C
doesn't have nested functions, so it should be a better default, what
with all the cpp madness that the C grammar doesn't grok.

Maybe also in C++ and Java -- AFAIU they don't have nested functions
either.

WDYT?