Ragel State Machine Compiler

http://www.complang.org/ragel/

by numeromancer • 15 years ago

39 15 15 years ago

drallison• 15 years ago

Ruby but no Python. :-(

thurston5• 15 years ago

A few people have stopped by the mailing list wondering how much work it would be to add a python generator. You could send a few motivating words in their direction to increase the chances of it being worked on.

davidhollander2• 15 years ago

This seems to have a copy of the HTTP1.1 ragel parser C from Mongrel https://github.com/fauna/mongrel/tree/master/ext/http11

Would be interesting to see how its performance compares to Ry's HTTP parser from the Node.js library: https://github.com/ry/http-parser

sambeau• 15 years ago

It's super-fast.

davidhollander2• 15 years ago

That's not a comparison and your pronoun's reference is ambiguous.

thurston5• 15 years ago

Ry's is faster. Ragel does pretty good and it gets you most of the way there when you need something that runs really fast, but it can't beat what a skilled programmer can do to optimize a parser.

haberman• 15 years ago

> it can't beat what a skilled programmer can do to optimize a parser.

What sorts of clever things does Ry's parser do that Ragel can't figure out?

supersillyus2• 15 years ago

I think a Go backend was added a while ago, but since there hasn't been a release in 2009, it isn't part of the official release yet.

thurston5• 15 years ago

That's right. That patch is waiting to go out. Unfortunately I didn't get a release out in 2010. By spring I'm hoping to have one. It got stalled because I was trying to include a revamp of conditions and I got hung up wrestling with the complexity of that problem. I now know what I'm dealing with and my plan is to push out a 6.7 with all the submitted patches, then later on do 7.0 with the new condition stuff. It's gonna be awesome :)

I've also been distracted by another project, which is also going to be awesome :)

supersillyus2• 15 years ago

Awesome. Thanks for the update, and nice work.

burke• 15 years ago

There seems to be a JavaScript target available too: https://github.com/dominicmarks/ragel-js

thurston5• 15 years ago

That's not in the trunk yet ... it is queued.

There is also C#. It's been in testing for a while and there are a few known bugs. Should get worked out in the next release.

Ragel State Machine Compiler

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