Re: [Boost-users] regex matching

From: Eric Niebler (eric_at_[hidden])
Date: 2006-02-08 12:07:28

Dave wrote:
> #define BOOST_REGEX_DYN_LINK
> 
> #include <iostream>
> #include <boost\regex.hpp>
> 
> using namespace boost;
> using namespace std;
> 
> int main()
> {
>  regex reg_exp("\xF8.\x2A..\x0D(P|V)[0-9A-F]{3}");
> 
>  // I would expect this to match.
>  cout << regex_match("\xF8p\x2Aqf\x0DPFFF", reg_exp) << endl;
> 
>  // I would expect this to not match due to the 'w'.
>  // Why does it match?
>  cout << regex_match("\xF8p\x2Aqfw\x0DPFFF", reg_exp) << endl;
> }

Because '\x2A' is '*' which is a regex meta-character which means "match 
the previous thing zero or more times.

-- 
Eric Niebler
Boost Consulting
www.boost-consulting.com