[Boost-users] question on boost::regex expression(query);

From: Mike Marchywka (marchywka_at_[hidden])
Date: 2007-10-01 14:21:28

Hi,
I'm new to boost and not all that familiar with Perl regex. However, I have 
my own
code for using Perl regex libraries for finding interesting features in DNA
( 
http://www.mail-archive.com/[e-mail]/msg01382.html 
)

I recently added boost to work along with Microsoft's greta code. However, I 
now
have a problem with regex exploding.
The questionable regex is presumably,

(?<=GU.*?TACTAAC.{20,40}AG|^).*?(?=GU.*?TACTAAC.{20,40}AG|$)

( which doesn't explode with greta AFAIK)

and the code in question is ( MM_MARK is debug macro, es is error stream
other stuff omitted).
        try {
                es<<MM_MARK<<" "<<" "<<'\n';
        boost::regex expression(query);
   [...]
        es<<MM_MARK<<" "<<" "<<'\n';

[ ...]
}
catch ( boost::regex_error e)
        { 	es<<MM_MARK<<" Error code "<<e.code()<<" at "<<e.position()<<'\n';
        es<<MM_MARK<<query<<'\n';
        return -1;
        }
        catch (exception e)
        { es<<MM_MARK<<" "<<e.what()<<'\n';
        es<<MM_MARK<<"  at "<<(start-sample)<<" for regex  "<<query <<".\n";
        }
        catch (...) {  es<<MM_MARK<<" "<<"Unknown exception \n";}
        return -1;
}

I have two questions, what is wrong with the regex and how do I trap the 
error?
The program just dies with "Aborted( core dump)." I guess there could be a 
build
problem but I thought it may be something obvious that I am doing wrong
in the regex or calling the library.

Thanks.

Mike Marchywka
586 Saint James Walk
Marietta GA 30067-7165
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marchywka_at_[hidden]
Note: Hotmail is blocking my mom's entire
ISP claiming it is to reduce spam but probably
to force users to use hotmail. Please DON'T
assume I am ignoring you and try
me on marchywka_at_[hidden] if no reply
here. Thanks.

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