bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient

[Yuan Fu]

> On Jan 30, 2023, at 11:58 AM, Dmitry Gutov <dgutov@yandex.ru> wrote:
> 
> On 30/01/2023 21:05, Eli Zaretskii wrote:
>>> Date: Mon, 30 Jan 2023 21:01:02 +0200
>>> Cc:casouri@gmail.com,60953@debbugs.gnu.org
>>> From: Dmitry Gutov<dgutov@yandex.ru>
>>> 
>>> But that doesn't answer the question "Could it?".
>> I don't understand what you are asking.  "Could" in what sense?
> 
> Like, would it make sense to try to modify it that way, or extract a function 
> that would do that, without writing it from scratch.
> 
> Or create a new function which would reuse some common code.
> 
> We would call the new function something like match_buffer_substring. 
> Optionally, also expose it to Lisp.

Another option is to change user/programmer’s expectation of the anchor: we 
could say that the regexp must match the entirety of the node text. IOW, \\` 
\\' are implied. 

Yuan