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Posted to dev@lucene.apache.org by "Uwe Schindler (JIRA)" <ji...@apache.org> on 2015/08/04 10:44:04 UTC

[jira] [Assigned] (LUCENE-6417) Upgrade ANTLR to version 4.5

     [ https://issues.apache.org/jira/browse/LUCENE-6417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Uwe Schindler reassigned LUCENE-6417:
-------------------------------------

    Assignee: Uwe Schindler

> 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-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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