[Boost-users] Regex: Invalid preceding regular expression problem

From: Brian Krahmer (brian_at_[hidden])
Date: 2007-10-30 17:59:17

Hello,
  I'm a new member to the mailing list.  BTW, thanks to everyone who 
contributes to boost.  It's a fantastic software.  I am having a problem 
with building an expression object.  The line in question reads 
'boost::regex expression(pattern, options);', where I'm using the 
boost::regex::extended option, and the pattern looks like this: 
"^([0-7]\\..*|8\\.0(\\.[0-3](\\.[0-3])?)?)[^.0-9]*?$".  I fired up a 
ruby interpreter, and it handled the regex fine (using "8.0.0.1 (en-US)" 
as a positive, and "9.0.0.1 (en-US)" as a negative).  Can anybody tell 
me what is wrong with this regex, or confirm that there may be a bug in 
the library?

thanks,
brian