GNU bug report logs - #62333
30.0.50; Issue with tree-sitter syntax tree during certain changes

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Message #74 received at 62333 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: wkirschbaum <at> gmail.com, casouri <at> gmail.com, 62333 <at> debbugs.gnu.org
Subject: Re: bug#62333: 30.0.50; Issue with tree-sitter syntax tree during
 certain changes
Date: Sat, 25 Mar 2023 19:05:13 +0200

On 25/03/2023 18:24, Eli Zaretskii wrote:
>> From: Dmitry Gutov <dgutov <at> yandex.ru>
>> Cc: "wkirschbaum <at> gmail.com" <wkirschbaum <at> gmail.com>,
>> 	"casouri <at> gmail.com" <casouri <at> gmail.com>,
>> 	"62333 <at> debbugs.gnu.org" <62333 <at> debbugs.gnu.org>
>> Date: Sat, 25 Mar 2023 19:03:45 +0300
>>
>>    But if the mmm framework narrowed the region to the current mode's
>>    block, widening will force tree-sitter to parse the whole buffer.
>>
>>   No, because such a mode mode should already make sure this doesn't
>>   happen.
>>
>> How?
> 
> The same way it makes sure a given parser is used only on the portion
> of the buffer where the corresponding language is used.

It uses narrowing. Major modes are not supposed to 'widen' willy-nilly.

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