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Posted to issues@lucene.apache.org by "Mark Harwood (Jira)" <ji...@apache.org> on 2020/04/21 14:44:00 UTC

[jira] [Created] (LUCENE-9336) RegExp.java - add support for character classes like \w

Mark Harwood created LUCENE-9336:
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             Summary: RegExp.java - add support for character classes like \w
                 Key: LUCENE-9336
                 URL: https://issues.apache.org/jira/browse/LUCENE-9336
             Project: Lucene - Core
          Issue Type: Improvement
          Components: core/other
            Reporter: Mark Harwood
            Assignee: Mark Harwood


Character classes commonly used in regular expressions like \s for whitespace are not currently supported and may well be returning false negatives because they don't throw any "unsupported" errors. 
The proposal is that the RegExp class add support for the set of character classes [defined by Java's Pattern API|https://docs.oracle.com/javase/tutorial/essential/regex/pre_char_classes.html]

I can work on a patch if we think this is something we want to consider.



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