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bug#60953: The :match predicate with large regexp in tree-sitter font-lo
From: |
Eli Zaretskii |
Subject: |
bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient |
Date: |
Wed, 01 Feb 2023 15:10:38 +0200 |
> Date: Tue, 31 Jan 2023 20:16:01 +0200
> Cc: casouri@gmail.com, 60953@debbugs.gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
>
> > Can you describe what that function should do? I don't think I have a
> > clear idea of that.
>
> In Lisp that function could be implemented as
>
> (defun buffer-substring-match (regexp &optional start end
> inhibit-modify)
> (string-match regexp
> (buffer-substring (or start (point-min))
> (or end (point-max)))
> inhibit-modify))
>
> Meaning, it matches the regexp against the buffer substring, with the
> string-start and string-end anchors working.
>
> But it would be implemented in C, meaning we could avoid the extra
> consing and funcall overhead.
Now I'm confused, because I thought the C functions we were
considering all fit the above description.
> Anyway, it seems like it might be too late as an addition to Emacs 29.
> And we can implement the match predicate using narrowing for this
> release, to be updated later.
Right, this is not a catastrophe, IMO. The work on TS-based modes is
just beginning.
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient,
Eli Zaretskii <=
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Eli Zaretskii, 2023/02/01
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Dmitry Gutov, 2023/02/01
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Dmitry Gutov, 2023/02/01
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Yuan Fu, 2023/02/01
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Eli Zaretskii, 2023/02/02
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Dmitry Gutov, 2023/02/02
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Eli Zaretskii, 2023/02/02
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Dmitry Gutov, 2023/02/02
- bug#60953: The :match predicate with large regexp in tree-sitter font-lock seems inefficient, Eli Zaretskii, 2023/02/02