Re: [Boost-users] [regex] memory exhausted

Kyle: the trick with these is to change the expression to make it as unambiguous as possible: the exception is thrown when the regex state machine visits too many states while trying to find a match and then gives it up as a lost cause rather than risking looking indefinitely.

In this case the first (.*|\\n*) is superfluous since . can match \n as well, so the machine can "thrash" if it encounters a lot of whitespace. Using (?!System)* fixed the problem and brought the execution time down enormously.

Spot on. I didn't think it could be that simple. Thanks! Kyle