Re: emacs-tree-sitter and Emacs

[Stefan Monnier <monnier@iro.umontreal.ca>]

>> I have gone through th0rex's pull request[2] and nothing suggests that
>> hooks are being used in order to do
>> the fontification of buffers, the only hook we have is
>> `tree-sitter--after-change', it does re-parsing and keeps
>> the tree updated
>
> Can you explain why an after-change hook is at all needed?

IIUC `tree-sitter--after-change` is not a function placed on
`after-change-function` but a hook which tree-sitter runs after its
parse tree has been changed.  The "tree-sitter-highlight" feature uses
this hook to be informed which parts of the buffer need to be
re-fontified after a change (which can be much more than just the part
of the buffer that was changed).


        Stefan