[jflex-users] merge more than one DFA into one

[Johnson W. <ins...@gm...>]

Dear Sirs,

If I use JFlex to merge more than one DFA into one( use '|' connect each other), then about the final DFA, how to know which regular expression does the final states comes from? 
For instance:
Regular Expression1(r1):  a|b
Regular Expression2(r2):  a|c
We use '|' to connect these two regular expressions:  a|b|a|c
Then, about the final states, how do we know the states comes from r1 or r2?

Tks for your time and help!