bug#62951: 29.0.90; c-ts-mode: Incorrect fontification due to FOR_EACH_TAIL_SAFE

[Dmitry Gutov]

On 23/04/2023 03:28, Yuan Fu wrote:
> What do you think of extending the parser to support these macros instead? (So 
> we fork tree-sitter-c.) If we can fix the parser, we don’t need to retrofit 
> hacks onto font-lock, indent, etc, separately, and it truly fixes the problem. 
> The downside is compiling from grammar source to grammar.c needs rust and node 
> tools. But I guess depending on the grammar maintained by tree-sitter’s author 
> isn’t too much different from depending on the grammar maintained by another 
> individual (ie, me)?

We had also talked at some point about replacing the actual text that 
the parser sees with something else.

If this can be done in a straightforward way (with tracking the 
subsequent correspondence of "real" text back to the buffer for syntax 
highlighting), that might be the perfect solution: we'd have a defcustom 
which would hold a list of macros used in the current codebase in the 
form of templates, and we'd set a bunch of them in emacs/.dir-locals.el.

I'm not sure how difficult this is to implement and maintain, but it's 
probably going to be less work to maintain than a fork of the grammar.