GNU bug report logs - #77848
31.0.50; treesit-update-ranges: offset setting is ignored for local parsers

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From: Juri Linkov <juri <at> linkov.net>
To: Roman Rudakov <rrudakov <at> fastmail.com>
Cc: Yuan Fu <casouri <at> gmail.com>, 77848 <at> debbugs.gnu.org
Subject: bug#77848: 31.0.50; treesit-update-ranges: offset setting is ignored for local parsers
Date: Thu, 17 Apr 2025 09:24:04 +0300

Cc-ing Yuan for the help.

> Hello, I've noticed that when defining 'treesit-range-settings' using the
> 'treesit-range-rules helper function, such as:
>
> (treesit-range-rules
>  :embed 'markdown-inline
>  :host 'clojure
>  :offset '(1 . -1)
>  :local t
>  (clojure-ts--docstring-query '@capture))
>
> The ':offset' setting doesn't have any effect.
>
> After debugging the 'treesit-update-ranges' function, I noticed that it
> calls 'treesit--update-range-1', which in turn calls
> 'treesit--update-ranges-local' if ':local t' is
> specified. 'treesit--update-ranges-local' does not accept offset as an
> argument, although it is mentioned in its documentation string:
>
>> OFFSET is a cons of start and end offsets that are applied to the range
>> for the local parser.
>
> This discrepancy between the documented behavior and the actual
> implementation of 'treesit--update-ranges-local' regarding the offset
> argument might be a bug.

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