Re: Using incremental parsing in Emacs

[phillip.lord@russet.org.uk]

Think it's already being worked on.

https://github.com/ubolonton/emacs-tree-sitter/

https://github.com/karlotness/tree-sitter.el

The former uses Rust for the dynamic module support. Tree sitter itself 
also uses Javascript and npm to define the language grammars, although 
AFAICT, these compile down to C.


On 2020-01-03 10:05, Eli Zaretskii wrote:
> Would someone like to try to figure out how we could use the
> incremental parsing technology in Emacs for making our
> programming-language support more accurate and efficient?  One package
> that implements this technology is tree-sitter:
> 
>   https://tree-sitter.github.io/tree-sitter/
> 
> AFAIU, these capabilities could be used as an alternative to
> regexp- and syntax-pps-based font-lock, better code folding,
> completion, refactoring, and other similar features; in general, any
> feature which would benefit from having a parse tree for the source
> code in a buffer.
> 
> To be able to use such libraries, we need to figure out how to
> integrate them into the core, what kind of interfaces would be needed
> for that, and what kind of infrastructure we would need for basing
> Lisp features on those libraries.  Posting practical ideas for design
> of all that would be a good first step in this promising direction.
> Bonus points for providing code patches that demonstrate the
> implementation of these ideas.
> 
> TIA