From: Ryan Davis <ryand-ruby@...>
Date: 2009-11-29T21:17:32+09:00
Subject: Re: ruby language parser in ruby


On Nov 29, 2009, at 03:23 , Brian Candler wrote:

> I'm looking for a ruby language parser written in ruby, that I can hack
> to play about with generating other ruby-like languages.
> 
> I've found RubyParser. Are there any other options I should be looking
> at?
> 
> * I see ruby 1.9 has ripper, but it's written as a C extension. I want
> something in pure ruby.

well to be fair. ripper is yacc + C. ruby_parser is racc + ruby. Until someone writes a recursive descent parser, you'll never have PURE ruby (and it wouldn't be quite as maintainable). I'm actually working on that, but I don't yet know if I'll succeed.

> * ParseTree is also in C I believe.

and doesn't parse. It just uses ruby to parse and grabs the internal ast.

> * Possibly could look at the internals of rubinius?

Was using ruby_parser, but now is also C... you know... ruby in ruby. :/

I think your best bet at this time is ruby_parser.