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From "Uwe Schindler (JIRA)" <>
Subject [jira] [Updated] (LUCENE-6417) Upgrade ANTLR to version 4.5
Date Sun, 09 Aug 2015 10:30:46 GMT


Uwe Schindler updated LUCENE-6417:
    Attachment: LUCENE-6417-cleanups.patch

I have some cleanups for the ANTLR stuff (build.xml):
- Remove useless regular expressions
- Don't copy-paste always the same, use a patternset for the files to edit
- remove the {.tokens} files after regenerating, they are not needed
- rename the grammar Javascript.g to Javascript.g4 (the ANTLR documentation suggests g4 for
the new grammar files, so editors can detect the type correctly)

> Upgrade ANTLR to version 4.5
> ----------------------------
>                 Key: LUCENE-6417
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Jack Conradson
>            Assignee: Uwe Schindler
>         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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