Jack Conradson created LUCENE-6417:
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Summary: 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
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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