# Re: Alternative Ruby grammar ( & Treetop)

**URL:** <https://www.ruby-forum.com/t/re-alternative-ruby-grammar-treetop/120441>\
**Category:** Ruby\
**Created:** [November 16, 2007, 11:16pm UTC](https://www.ruby-forum.com/t/re-alternative-ruby-grammar-treetop/120441 "2007-11-16T23:16:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![philthompson](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/ed8c4c/32.png) [@philthompson](https://www.ruby-forum.com/u/philthompson)\
**Post date:** [November 16, 2007, 11:16pm UTC](https://www.ruby-forum.com/t/re-alternative-ruby-grammar-treetop/120441/1 "2007-11-16T23:16:04Z")

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On 11/16/07, Ryan D. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> there is no complete ruby parser based on antlr yet that I know of.
> 
> treetop is not a ruby parser, it is a ruby parser generator (like  
> antlr).

I just took a look at treetop as I hadn’t heard of it before - I just  
watched the screencast and all I can say is Wow, just Wow!

Take a look if you haven’t:  
[http://www.pivotalblabs.com/articles/2007/09/15/treetop-1-0-1](http://www.pivotalblabs.com/articles/2007/09/15/treetop-1-0-1)