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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-6417) Upgrade ANTLR to version 4.5
Date Thu, 06 Aug 2015 07:49:06 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14659644#comment-14659644
] 

Uwe Schindler commented on LUCENE-6417:
---------------------------------------

Thanks Jack,
I will look into this later. I am out of office at the moment! But from my quick inspection,
this looks really fine!
Uwe

> Upgrade ANTLR to version 4.5
> ----------------------------
>
>                 Key: LUCENE-6417
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6417
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Jack Conradson
>            Assignee: Uwe Schindler
>         Attachments: LUCENE-6417.patch, LUCENE-6471.patch, LUCENE-6471.patch, 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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