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[Bug 4610] K2-ReplaceFunc-3

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Date: Tue, 12 Jun 2007 09:00:19 +0000
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http://www.w3.org/Bugs/Public/show_bug.cgi?id=4610





------- Comment #2 from frans.englich@telia.com  2007-06-12 09:00 -------
(I think the tests are slightly different. K2-ReplaceFunc-3 has a back
reference before the corresponding paranthesis, while K2-MatchesFunc-*'s back
references have no corresponding paranthesis at all.)

I agree that raising FORX0002 makes sense from a usability perspective(although
my knowledge in regexps is brief) and that the spec says so; "The closing right
parenthesis of this subexpression must occur before the back-reference."

Though, I remember discussing this with Mike and we came to the conclusion that
back references that didn't match, matched the empty string: "If no string is
matched by the nth capturing subexpression, the back-reference is interpreted
as matching a zero-length string." I failed to find the mail trails from the
discussion; Mike, what's your thoughts on this topic?

I'm currently inclined to change the mentioned tests to FORX0002.
Received on Tuesday, 12 June 2007 09:00:21 UTC

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