Re: [Boost-users] regexp - how to do an anti-match on a word

David Ward wrote:

Boosters:

I'm having trouble determining a regular expression that will do the following:

1. Match the following strings: TermGeMstreamIPTriplePlay_11.0.IpTxMstream_0.DefaultGateway TermGeMstreamIPTriplePlay_11.0.VplsTxMstream_0.CurMbps TermGeMstreamIPTriplePlay_11.0.MplsTxMstream_0.AvgMbps TermGeMstreamIPTriplePlay_11.0.MacTxMstream_0.Address

2. But not match the string: TermGeMstreamIPTriplePlay_11.0.TrafficTxMstream_0.RampStart

So, essentially match the strings with IpTx, VplsTx, MplsTx and MacTx, but not match strings with TrafficTx.

Right now, I have:

.*\.(IpTx|MacTx|MplsTx|VplsTx)Mstream_0\..*

This works, however, it is not very robust because there may be more entries added to the matching words over time.

Is there someway to do an anti-match on the word "TrafficTx"? Something like:

.*\.(!TrafficTx)Mstream_0\..*

Use a zero width lookahead assertion, so something like: .*\.(?!TrafficTx)\w+Mstream_0\..* HTH, John.