Re: Tree-sitter, using treesit-range-rules for embedded languages

[Wilhelm Hugo Kirschbaum <wilhelm@floatpays.co.za>]

On Tuesday, 22 November 2022 21:28:48 SAST Yuan Fu wrote:
> > On Nov 22, 2022, at 9:24 AM, Wilhelm <wkirschbaum@gmail.com> wrote:
> > 
> > Is there perhaps an example using treesit-range-rules? To following
> > attempt to set treesit-range-settings does not seem to have the desired
> > effect.
> > 
> > (defvar heex--treesit-range-rules
> > 
> >  (treesit-range-rules
> >  
> >   :embed 'elixir
> >   :host 'heex
> >   
> >   '((directive (partial_expression_value) @cap)
> >   
> >     (directive (expression_value) @cap)
> >     (expression (expression_value) @cap))))
> > 
> > (setq-local treesit-range-settings heex--treesit-range-rules)
> > 
> > The following error also pops up when modifying the buffer when removing
> > buffer content:
> > 
> > Error during redisplay: (jit-lock-function 1) signaled
> > (treesit-range-invalid "RANGE is either overlapping, out-of-order or
> > out-of-range" ((11 . 20)))
> > 
> > The full attempt is here:
> > https://github.com/wkirschbaum/elixir-mode/blob/main/heex-mode.el
> Thanks Wilhelm. It would be nice if you can provide some example source file
> of heex for me to experiment with. I tried to find some on the internet but
> didn’t get very far :-)
> 
> Yuan

Thanks for having a look as I was not sure if this was meant to be used yet. 

A heex file can be as simple as this: 

#sample.html.heex
<div>
  <%= Enum.map([1, 2], &(&1 + 1)) %>
</div>

and the directive <%= (partial_expression_value) %> should then be elixir., 
not heex.

When checking with (treesit-language-at (point))  for the embed it still show.

Wilhelm