Is there a maintained setup for parsing the Rust language itself?

[tgross35]

Hey all,

Are there prewritten grammar files for established languages, specifically Rust? I'm hoping to be able to lex .rs files in a lightweight way. But if something exists already, it would be quite a nice time saver.

An index of off the shelf grammers for maintained languages would be pretty cool. Maybe this exists, but I have been unsuccessful finding it.

[tomtau]

I'm not aware of the Rust grammar in Pest, but there's this famous crate that uses the Rust compiler's internal parser: https://crates.io/crates/syn

[tgross35]

Lol, my end project was actually a tool to make designing syn parsing a little bit easier. But I don't believe syn does string -> TokenTree parsing, instead it does TokenTree -> tokens. quote does, but it relies on the compiler to parse - which isn't suitable for my case (hopefully targeting wasm).