bug#59498: 29.0.50; c++-ts-mode get wrong-type-argument error when enabled

[Yuan Fu]

Eason Huang <aqua0210@foxmail.com> writes:

> Yuan Fu <casouri@gmail.com> writes:
>
>>> On Nov 26, 2022, at 11:24 PM, Eli Zaretskii <eliz@gnu.org> wrote:
>>>
>>>> From: Stefan Monnier <monnier@iro.umontreal.ca>
>>>> Cc: Yuan Fu <casouri@gmail.com>,  dev@rjt.dev,  aqua0210@foxmail.com,
>>>>  59498@debbugs.gnu.org,  mardani29@yahoo.es
>>>> Date: Sun, 27 Nov 2022 02:18:06 -0500
>>>>
>>>>>> I added treesit-comment-start/end to help indenting comments. So this is
>>>>>> the correct way to use them. The following comment explains why I created
>>>>>> new variables:
>>>>>>
>>>>>> ;; `comment-start' and `comment-end' assume there is only one type of
>>>>>> ;; comment, and that the comment spans only one line.  So they are not
>>>>>> ;; sufficient for our purpose.
>>>>>
>>>>> ??? This is surprisingly unclean, IMO.  For starters, the names of the
>>>>> variables are confusing.  The need to define two sets of comment-start and
>>>>> comment-end regexps is also a nuisance and a source of errors.
>>>>>
>>>>> How do non-treesit modes handle this issue?  Why do the treesit-based 
>>>>> modes
>>>>> need something special here?
>>>>>
>>>>> Stefan, any ideas?
>>>>
>>>> `comment-start` and `comment-end` do not describe the set of possible
>>>> comment delimiters.  They describe the comment delimiters that should be
>>>> *inserted* when we do things like `comment-dwim`.
>>>>
>>>> To find/match comment delimiters we have `comment-start-skip` and
>>>> `comment-end-skip`.  They're not ideal, but they've been good enough so 
>>>> far.
>>>> They don't say which comment starter matches which comment-ender (that
>>>> was done by the syntax-tables), but tree-sitter should be able to tell
>>>> us that when we need it.
>>>>
>>>> It would be nice if we could avoid the need to set/use
>>>> `comment-start-skip` and `comment-end-skip` when using tree-sitter.
>>>> Maybe we can compute their values from the tree-sitter grammar.
>>>> But getting rid of uses of those vars will take a fair bit more work,
>>>> I think.
>>>
>>> OK, but do you agree that adding yet another pair of variables,
>>> treesit-comment-start/end, is the opposite of what we want?
>>
>> Yes. I removed them in d5dc1dbf7cb.
>>
>
>
> Hi Yuan,
>
> I build Emacs with the commit a85ff22300, which contain d5dc1dbf7cb,
> I can confirm that the indent issue has been fixed.
> Thanks you very much.

Thanks for verifying!

Yuan