Re: How to add pseudo vector types

[Eli Zaretskii]

> From: Yuan Fu <casouri@gmail.com>
> Date: Wed, 28 Jul 2021 12:36:33 -0400
> Cc: Eli Zaretskii <eliz@gnu.org>,
>  emacs-devel <emacs-devel@gnu.org>,
>  Clément Pit-Claudel <cpitclaudel@gmail.com>,
>  monnier@iro.umontreal.ca
> 
> > So don't send a change that deletes the hidden text; just send changes
> > in the visible part of the text (that's the only place the user can make
> > changes). tree-sitter will only run the scanner on the change regions,
> > so it will only request text from the visible part of the buffer;
> > all the requests will succeed.
> 
> Then we are not hiding the hidden text from tree-sitter. The implementation 
> you described, IIUC, is essentially do nothing special when the buffer is 
> narrowed. 

If the TS parser is called while the narrowing is in effect, it will
be unable to access text beyond BEGV..ZV.  So in that case the
narrowing _will_ affect TS.