From: Yuan Fu <casouri@gmail.com>
To: Abin Simon <mail@meain.io>
Cc: emacs-devel@gnu.org
Subject: Re: Question on getting tree-sitter matches
Date: Tue, 14 Mar 2023 16:31:19 -0700 [thread overview]
Message-ID: <A17D1A81-840B-4A6A-B509-3991F15D6AC7@gmail.com> (raw)
In-Reply-To: <877cvle3c3.fsf@meain.io>
> On Mar 12, 2023, at 8:29 PM, Abin Simon <mail@meain.io> wrote:
>
>> Unfortunately, that’s currently not possible. Could you elaborate on why you need such feature?
>
> This came up when working with https://github.com/meain/evil-textobj-tree-sitter.
>
> In this repo, I pull queries from Neovim repo which dos similar things,
> https://github.com/nvim-treesitter/nvim-treesitter-textobjects. They
> have custom predicates added and one of them is `#make-range!` which is
> used to combine two captures together to form a new capture.
>
> You can find an example at
> https://github.com/nvim-treesitter/nvim-treesitter-textobjects/blob/5b2bcb9ca8315879181f468b37a897100d631005/queries/perl/textobjects.scm#L5
>
> ((patter_matcher_m
> (start_delimiter) @_start
> (end_delimiter) @_end) @regex.outer
> (#make-range! "regex.inner" @_start @_end))
>
> In here, they use `#make-range!` to form a `regex.inner` predicate by
> combining `@_start` and `@_end` markers' ranges. Since we do not have
> support for this predicate, I was working around this by converting the
> query into the following:
>
> https://github.com/meain/evil-textobj-tree-sitter/blob/66819ee8547e439f003fcb0e1647acade194bd1a/queries/perl/textobjects.scm#LL5-L8C3
>
> ((patter_matcher_m
> (start_delimiter) @regex.inner._start
> (end_delimiter) @regex.inner._end) @regex.outer
> )
>
> Once we have this, we use `regex.inner._start` and `regex.inner._end` to
> do something similar (but we need to be able to restrict the search to a
> single match group).
>
> You can find the relevant part of the code from the plugin here:
>
> https://github.com/meain/evil-textobj-tree-sitter/blob/66819ee8547e439f003fcb0e1647acade194bd1a/evil-textobj-tree-sitter-core.el#L157
I see. We can add an optional argument to treesit-query-capture to toggle the “grouping” of matches, WDYT?
Yuan
next prev parent reply other threads:[~2023-03-14 23:31 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-12 14:32 Question on getting tree-sitter matches Abin Simon
2023-03-13 2:34 ` Yuan Fu
2023-03-13 3:29 ` Abin Simon
2023-03-14 23:31 ` Yuan Fu [this message]
2023-03-15 4:24 ` Abin Simon
2023-03-19 21:59 ` Yuan Fu
2023-03-20 4:09 ` Abin Simon
2023-03-20 20:27 ` Ergus
2023-03-20 23:25 ` Yuan Fu
2023-03-21 3:29 ` Eli Zaretskii
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