Very interesting, and cool implementation!

You might be interesting in this tool as well: https://medium.com/@DmitrySoshnikov/syntax-language-agnostic-parser-generator-bd24468d7cfc#.6gdqv6hhh It’s a language agnostic parser generator, which allows building any parsers (LR/LL, naturally handling left-recursion, etc) for any language (JavaScript, Python, Ruby, PHP, C#, etc).

Dmitry