Philippe Biondi wrote:

regexp support was planned but not done yet. (if someone know where I can
download more free time !).

The implementation should not be that hard, once you have the compiler to
transform the string describing the regexp to an automaton.

Note that to respect the framework, you have to deal with multiple
patterns (should not be that hard). If you have pat1 and pat2, searching
for (pat1|pat2) is not sufficient because for each match, you have to
point which pattern matched.
 

We actually planned on doing that initially. You should note that if you 
want to generate one automaton for multiple patterns, that is not a 
regular language (and thus can not be represented by a FA or DFA.)  You 
will have to try matching against the first pattern, then the next and 
so on.

Ethan