Regular expression listing all possibilities

Question

Given a regular expression, how can I list all possible matches? For example: AB[CD]1234, I want it to return a list like: ABC1234 ABD1234

I searched the web, but co

Answer 1

A regular expression is intended to do nothing more than match to a pattern, that being said, the regular expression will never 'list' anything, only match. If you want to get a list of all matches I believe you will need to do it on your own.