Originally Posted by
nedrocks 
There's a way to set precedence of regex's in flex. I don't remember the exact syntax, but you should put it before your catchall regex that you have defined there.
i haven't seen what you mention in the manual...
unfortunately i haven't found the solution...i worked around my problem by changing the grammar {i.e. bison file}, and finally i gave the project... Now when i find the time i will try to find a solution using starting conditions