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List:       xerces-c-dev
Subject:    [jira] Updated: (XERCESC-1390) Regular expressions with unions do not work properly with replacing a
From:       "David Bertoni (JIRA)" <xerces-c-dev () xml ! apache ! org>
Date:       2005-03-29 21:42:17
Message-ID: 1499391445.1112132537092.JavaMail.jira () ajax ! apache ! org
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     [ http://issues.apache.org/jira/browse/XERCESC-1390?page=history ]

David Bertoni updated XERCESC-1390:
-----------------------------------

    Attachment: patch.txt

> Regular expressions with unions do not work properly with replacing and tokenizing.
> -----------------------------------------------------------------------------------
> 
> Key: XERCESC-1390
> URL: http://issues.apache.org/jira/browse/XERCESC-1390
> Project: Xerces-C++
> Type: Bug
> Components: Utilities
> Versions: 2.6.0
> Reporter: David Bertoni
> Priority: Critical
> Attachments: patch.txt
> 
> Consider the following regular expression:
> "(ab) | (a)"
> with the following input string:
> "abracadabra"
> If you use an instance the RegularExpression class to replace any matching \
> substrings with the empty string, the result should be the following string: "rcdr"
> Instead, just the last "a" in the string is replaced:
> "abracadabr"
> If you use the same RegularExpression instance to tokenize the expression, the \
> result should be the following set of strings: ""
> "r"
> "c"
> "d"
> "r"
> ""
> Instead, the result is
> "abracadabr"
> ""
> I will attach a proposed patch, but I don't know this code well, so it would be \
> great if someone could review it.

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