I'll throw in a plug for https://pest.rs/ a PEG-based parser-generator library in Rust. Delightful to work with and removes so much of the boilerplate involved in a parser.
I have been using this tool. The best feature imho is that you can quickly iterate on the grammar in the browser using the online editor in the homepage.
I was struggling though with the lack of strong typing in the returned parse tree, though I think some improvements have beenade there which I did not have a chance to look into yet
