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bug#61208: 29.0.60; treesit-beginning/end-of-defun problem with macros i
From: |
Yang Yingchao |
Subject: |
bug#61208: 29.0.60; treesit-beginning/end-of-defun problem with macros in c-ts-mode |
Date: |
Thu, 02 Feb 2023 09:48:19 +0800 |
User-agent: |
mu4e 1.8.13; emacs 29.0.60 |
On Thu, Feb 02 2023, Yang Yingchao <yang.yingchao@qq.com> wrote:
> On Wed, Feb 01 2023, Theodor Thornhill <theo@thornhill.no> wrote:
>
>> Eli Zaretskii <eliz@gnu.org> writes:
>>
>>>> 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?
>>
>> I'm fine with that change, I think. Other, "smaller" constructs can be
>> found as sentences or sexps anyway, I think.
>>
>> Theo
>
Thanks for the help.
But in the following C++ code, is it possible to make
treesit-beginning/end-of-defun behaves the same as c++-mode ?
,----
| class Test // LINE_D
| {
| public:
| Test(int i) // LINE_C
| {
| SWITCH(i)
| {
| CASE(A)
| {
| ;
| }
| CASE(B) // LINE_B
| {
| ; // LINE_A
| }
| }
| }
| };
`----
When cursor is at LINE_A, if in c++-mode, `C-M-a` moves cursor to LINE_C, which
is correct.
But in c++-ts-mode, behaviour of `C-M-a` is wrong:
if treesit-defun-tactic is nested, it moves to line_B, and if
treesit-defun-tactic is top-level,
it moves to LINE_D. Both of them are actually wrong...
--
Yang Yingchao
Yang Yingchao