Tool to convert regex between different language syntaxes?

Question

Is there a tool to convert a regex from one popular language's syntax to another? For example a Python-style regex to a Java-style regex?.

Or at least, has someone put together a set of rules to do these conversions?

And obviously some constructs won't be able to convert.

@GaretJax I think the grammar for regexes is not regular, so no :) — Jörn Horstmann, Aug 03 '11 at 22:17
Regexes are no more limited to regular grammars I think; I mean, you can use callback functions in python or other special constructs which are not part of the formal definition to parse whatever you need... I have no proof of that though... ;) — GaretJax, Aug 03 '11 at 22:20
@Jörn, this is not formal language theory. Regex in Perl/Java/Python are not regular, and I do not think they ever were. — Qtax, Aug 03 '11 at 22:27

score 7 · Accepted Answer · edited May 23 '17 at 12:19

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Go to this article, and follow the link to "Regex info's comparison of Regex flavors", that got me to a tool called RegexBuddy, which sounds like it might do what you want.

edited May 23 '17 at 12:19

Community

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answered Aug 03 '11 at 22:16

John Gaines Jr.

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I don't have access to a Windows computer but the comparison info is probably good enough to construct a translator of my own. Thanks! – guidoism Aug 04 '11 at 20:43
For a list of alternatives to RegexBuddy, see here: http://stackoverflow.com/questions/132405/free-alternative-to-regxbuddy – Anderson Green Mar 17 '13 at 23:59
Curious, did you have any success in rolling your own? – Cheezmeister May 07 '14 at 05:25

score 6 · Answer 2 · answered Aug 03 '11 at 22:15

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Yes there is a Windows tool that will do this: RegexBuddy

answered Aug 03 '11 at 22:15

ridgerunner

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Tool to convert regex between different language syntaxes?

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