Hi! Rust Sitter creator here, happy to answer any questions about the project and where it's going!
I'm curious about the set of available parser annotations. I went through the list but I didn't see anything which allows for optional elements. One example would be dangling commas. Did I miss it or are there plans to support such constructs?
struct ... {
...
#[rust_sitter::leaf(text = ",")
_dangling_comma: Option<()>
}