Re: [Boost-users] follow up on regex questions

What is the text you are matching against? If you can give me a concrete example I can test it here, but "it hangs" isn't very useful I'm afraid ;-)

Unless it is easy, please hold off on that last example. I think greta may be failing too but with a less overt failure mode. It isn't hanging or aborting but the piece of code exploding with boost may be dropping some data with greta. Given all the suspects, let me make sure greta code works perfectly. Thanks again.

From: "John Maddock" Reply-To: boost-users@lists.boost.org To: Subject: Re: [Boost-users] follow up on regex questions Date: Thu, 4 Oct 2007 17:37:22 +0100

Mike Marchywka wrote:

...

Hi, Thanks for your help in the past. I would normally drop the issue at this point until I get my build environment cleaned up (" My build is messed up, I haven't read the documentation. What is wrong with YOUR library?" LOL). but I do have one more question which I believe is related to boost regex processing. If someone has a known good regex test program or can point to an obvious problem it may be helpful.

You mean libs/regex/test/regress/*.cpp ?

It would be a good idea to build and run this to verify the sanity of your setup at least: I still have a suspision that the binaries you are using are not compatible with your build options or regex headers, but I can't be sure.

...

Again, this code seems to work with Microsoft's greta and boost gives identical results on a longer list of SIMPLER regexes so I reasonably believe that the problem is due to handling of more complicated expression ( One caveat, to be complete, is that greta did seem to return some spurious results but they are easily filter programmatically, things like negative location, but the plausible ones that I have checked manually are right). However, on this sequence of regexes (regexi?) I get either an abort OR the program hangs later on non-sensical execution (I know, "Gee, you have a build problem and the stack is messed up?").

myboost.cpp114 (GU.*?TACTAAC.{20,40}AG|^)(.*?)(GU.*?TACTAAC.{20,40}AG) myboost.cpp114 ATG(...)*?(TAG|TAA|TGA) myboost.cpp114 TATAA.*?ATAAA myboost.cpp114 (GU.*?TACTAAC.{20,40}AG|^)(.*?)(GU.*?TACTAAC.{20,40}AG) myboost.cpp114 ATG(...)*?(TAG|TAA|TGA)

( progam hangs in my code or had been core dumping in boost::regex )

What is the text you are matching against? If you can give me a concrete example I can test it here, but "it hangs" isn't very useful I'm afraid ;-)

John.

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