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From "Jack Conradson (JIRA)" <>
Subject [jira] [Commented] (LUCENE-6417) Upgrade ANTLR to version 4.5
Date Mon, 03 Aug 2015 16:01:06 GMT


Jack Conradson commented on LUCENE-6417:

Sorry, Mike and Uwe, for the delayed response.  I was actually on vacation the previous week.
 I'll fix the pre-commit and make the suggested changes.  The ASM did not change at all (other
than by mistake :) ), I was just forced to re-organize the ASM generation code into smaller
chunks for the Antler 4.5 visitor.  Thanks for reviewing the patch!

> Upgrade ANTLR to version 4.5
> ----------------------------
>                 Key: LUCENE-6417
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Jack Conradson
>         Attachments: LUCENE-6471.patch
> I would like to upgrade ANTLR from 3.5 to 4.5.  This version adds several features that
will improve the existing grammars.  The main improvement would be the allowance of left-hand
recursion in grammar rules which will reduce the number of rules significantly for expressions.
> This change will require some code refactoring to the existing expressions work.

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