I’m working through the book The Elements of Computing Systems by Nisan and Schocken and doing all the implementation in Rust. I’m up to Chapter 9, where I have to write a parser for the Jack language, which can be fairly described as a simplified version of Java. The book suggests a separate tokenizer and recursive descent parser. I used nom for the parsing in the previous chapters where the languages were quite a bit simpler, but making a parser for a whitespace-delimited language with nom seems a bit cumbersome. What’s my best option here? I’d rather avoid manually writing the parser if possible. Maybe writing a tokenizer and then using nom to parse the token stream instead of the source code would be a good middle ground?
