GNU bug report logs - #77906
31.0.50; php-js-mode and js-ts-mode: treesit-show-paren-data--categorize: peculiar error: ("Cannot find the definition of the predicate in `treesit-thing-settings'" list)

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From: Juri Linkov <juri <at> linkov.net>
To: Yuan Fu <casouri <at> gmail.com>
Cc: Vincenzo Pupillo <v.pupillo <at> gmail.com>, 77906 <at> debbugs.gnu.org
Subject: bug#77906: 31.0.50; php-js-mode and js-ts-mode: treesit-show-paren-data--categorize: peculiar error: ("Cannot find the definition of the predicate in `treesit-thing-settings'" list)
Date: Mon, 12 May 2025 21:23:29 +0300

>>>> With this patch the following case works correctly in test.heex:
>>>> 
>>>>  <%= if true do %>
>>>>    <p>hello, tree-sitter!</p>
>>>>  <% end| %>
>>>> 
>>>> With point at "|" the command 'backward-sexp' (C-M-b)
>>>> correctly jumps to the beginning of "if".
>>>
>>> Right.  I think it can be done in backward-sexp since there we know
>>> we’re moving back.  I assume that’s what you mean.
>>
>> The problem is that the last time when the arg is still -1
>> is in 'treesit-forward-sexp', and then it calls
>> 'treesit-beginning-of-thing' with '(abs arg)'.
>>
>> The complete call chain:
>>
>> - treesit-forward-sexp
>> - treesit-beginning-of-thing
>> - treesit-navigate-thing
>> - treesit-thing-at
>> - treesit-node-at
>> - treesit-parsers-at
>> - overlays-at
>>
>> So not clear how to propagate the flag for decrementing the offset.
>> Maybe by let-binding a new dynamically bound variable?
>
> Ok, here is the patch:

Now pushed to master.

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