Yeah, I can second that recommendation on reading the paper [0]. It's one of the nicest I've read. There is also a Rust crate for it[1] - though it's not as... 'pretty'... as the Haskell EDSL, obviously.

[0]: http://homepages.inf.ed.ac.uk/wadler/papers/prettier/prettie...

[1]: https://crates.io/crates/pretty