Comments on: ANTLR By Example: Part 5: Extra Credit

By: Manoj Rajagopalan

Manoj Rajagopalan — Tue, 18 Aug 2009 14:54:39 +0000

Nice tutorial! I found another tutorial which might have a solution to your DRY violation:

http://jnb.ociweb.com/jnb/jnbJun2008.html

Please scroll down to the section titled “Our Parser Grammar”. The author specifies a parser-grammar option to load the lexer tokens.

Thanks,
Manoj

By: Jason

Jason — Mon, 01 Jan 2007 13:29:59 +0000

Demetrios,

Thanks for the kind feedback. I would like to review the tutorial at some point. At the moment it (and unfortunately some questions from readers) has been neglected for a little while. Of course, it comes down to finding the time to review it properly, but you have provided some motivation .

By: Demetrios Kyriakis

Demetrios Kyriakis — Sat, 30 Dec 2006 15:49:39 +0000

Thank you very much for this great tutorial.
So far, this is the BEST ANTLR tutorial I’ve ever red, and even if ANTLR is pretty heavy, most users(I know) who read your tutorial understood it much better based on your “real and simple example” approach (it’s even
simpler than the “simple calculator” example).

Because this tutorial is so great, IMHO you could/should:
- review it, and extend a little,
- generate a PDF (all in one)
- publish it on the ANTLR lists, so that everybody knows about it.
- submit it to TheServerside and JavaWorld.com cause it’s very easy to understand and you would get a much bigger audience.

Thank you,

By: Kunnummal

Kunnummal — Thu, 09 Nov 2006 23:46:28 +0000

Hi,
Thanks for wonderful tutorial, I have really enjoyed this and got something out from it.

I have a concern about the validation, looks like if we try

java NotifyConditionParserTest “changed changed changed”

It is picking the first one ‘changed’ and ignoring it, I would expect it raises an syntax exception.

Thanks
Kunnummal

By: Ibrahim

Ibrahim — Tue, 08 Aug 2006 13:12:12 +0000

Hi!

considering the DRY violation, have you tried

class MyParser extends Parser;
options {
importVocab=V;
}

ANTLR will now look for VTokenTypes.txt in the current directory and preload the token manager for MyParser with the enclosed information.

HTH,
Ibrahim