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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (LUCENE-6417) Upgrade ANTLR to version 4.5
Date Sun, 09 Aug 2015 17:39:45 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14679122#comment-14679122
] 

Uwe Schindler edited comment on LUCENE-6417 at 8/9/15 5:39 PM:
---------------------------------------------------------------

I just committed a change to make JavaScriptCompiler completely stateless, this was non-ideal
before, but thanks to separate visitor this is now much more elegant.


was (Author: thetaphi):
I just committed a change to make JavaScriptCompiler completely stateless, this was non-ideal
before, but thats to separate visitor this is now much more elegant.

> Upgrade ANTLR to version 4.5
> ----------------------------
>
>                 Key: LUCENE-6417
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6417
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/expressions
>            Reporter: Jack Conradson
>            Assignee: Uwe Schindler
>             Fix For: Trunk, 5.4
>
>         Attachments: LUCENE-6417-cleanups.patch, LUCENE-6417.patch, 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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