An implementation of ruby in pure rust.

I started this project as a way to learn rust. Eventually, I've learnt more than that, including lexer & parser, ragel, and a lot of i-did-not-know-that-in-ruby tricks.

Lots of the grammar rules and AST conventions are ripped from the parser gem.

I crafted a runnable lexer and parser, interpreter is still a no-go.

For lexer, I adapated some rules from parser and ported from ruby-on-ragel-6 to rust-on-ragel-7

For parser, I use syntax-cli as parser generator.