Finite-state automaton for regular expressions.

This package contains a full DFA/NFA implementation with Unicode alphabet and support for all standard (and a number of non-standard) regular expression operations.

The most commonly used functionality is located in the classes {@link org.apache.lucene.util.automaton.Automaton} and {@link org.apache.lucene.util.automaton.RegExp}.

For more information, go to the package home page at http://www.brics.dk/automaton/. @lucene.experimental