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Re: Tree sitter support for C-like languages


From: Stefan Monnier
Subject: Re: Tree sitter support for C-like languages
Date: Tue, 15 Nov 2022 11:01:24 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux)

> I guess we need to report these to the developers of the Tree-sitter's
> C parser?  Is there anything else we could do until they fix
> the parser?

AFAIK the tree-sitter parser parses basically already-preprocessed C.
It's wickedly hard to parse meaningfully notyet-preprocessed C with
something based on a BNF grammar.
So my guess is that this is going to be a "wont fix".

There might be a way to handle it (basically by using the CPP
definitions to extend the BNF grammar on the fly), but it seems
difficult to include it into a parser based on compiling the BNF to
a state machine :-(


        Stefan




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