Serkan Mulayim wrote on 6/8/17 7:12 PM:

afaik there is no C implementation of the Regex query. I wrote the Perl version.

https://metacpan.org/release/LucyX-Search-WildcardQuery

You will be *much* happier with storing the file extension as a separate field
and searching on that. Far far more efficient at search time than munging a regex.
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Peter Karman  .  https://karpet.github.io  .  https://keybase.io/peterkarman
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