Merge several regexes to a single one

Question

I have several regexes (actually several thousands), and I must check if one string matches any of these regexes. It is not very efficient, so I would like to merge all thes

Answer 1

I very much doubt it, on the grounds that any such tool would have to be very complex to deal with all the different ways in which a regex could be combined.

If the regexes you have are relatively simple, such as in your examples, you may have some luck writing your own, however.