bug#61235: 30.0.50; tree-sit: `treesit-node-check' lacks a way to tell if a node belongs to a deleted parser

[Yuan Fu]

> On Feb 6, 2023, at 7:31 PM, Eli Zaretskii <eliz@gnu.org> wrote:
> 
>> From: Yuan Fu <casouri@gmail.com>
>> Date: Mon, 6 Feb 2023 19:00:30 -0800
>> Cc: Mickey Petersen <mickey@masteringemacs.org>,
>> 61235@debbugs.gnu.org
>> 
>>> Yuan, any reason not to extend treesit-node-check instead?
>> 
>> I did extend treesit-node-check in the patch. But I also added a function 
>> treesit-parser-live-p, which makes the same check but directly on a parser. 
>> It just made sense to me that if we let treesit-node-check check the nodes’ 
>> parser’s status, we’d also add a function to allow directly checking the 
>> status of a parser.
> 
> That additional function would signal an error in the case discussed
> here, so I'm not sure we should add it in that shape, or at all.  Why
> isn't treesit-node-check enough?

Oops, it shouldn’t have. The updated patch fixes that. Treesit-node-check is 
enough, it just made more sense implentattion-wise, to implement that function 
that checks a parser, and let treesit-node-check use that function to check the 
node’s parser. We can choose to not expose that function, and only expose this 
feature through treesit-node-check, if you prefer so.

Yuan

livep.patch
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