Re: [Boost-users] boost::regex on to match in the middle of a string

Subject: Re: [Boost-users] boost::regex on to match in the middle of a string
From: ninti_at_[hidden]
Date: 2010-03-11 21:00:57

I'm a C++ and Boost newbie, and no regex guru, so don't quote me either :-) 
 
One thing I notice in your expression is a \t character following the =. Isn't that only going to match a tab? 
 
The boost::regex flag 'match_not_dot_newline' might be relevant, but since this flag must be explicitly set, it looks like dots match newlines by default. 
 
Would something as simple as this work (assuming dots match newlines)?: 
 
boost::regex ln0("WORD_TO_FIND=(.*)$", boost::regex::perl ); 
 
This assumes that the match you're looking for runs to the end of the string, which isn't clear. 
I'm also not clear if you want to match a single word or multiple words. 
 
Would stripping out newlines and replacing them with spaces first (or even later) help? 
 
Mick 
 
 
 
 On Fri 12/03/10 10:32 AM , OvermindDL1 overminddl1_at_[hidden] sent: 
> On Thu, Mar 11, 2010 at 10:54 AM, Conoscenza Silente 
>  wrote:> Hi All 
> > I am newbie to boost::regex. 
> > I have a string including multiple new lines 
> characters in it like the one> below. 
> > 
> > "this is a big string\nthat I would 
> like\ntoParse here:> WORD_TO_FIND=Ciao\nin the 
> middle"> 
> > I tried the following regex but it doesn't 
> match.> 
> > boost::regex 
> ln0("WORD_TO_FIND=\t(?\\w+).+", boost::regex::perl 
> );> 
> > Do you know what is the option and how to set it 
> up> to enable the matching for an entire string and 
> not line by line? 
> Do not quote me, I am not that knowledgeable about regex, but give 
> this a try, add a g\ to the beginning of your parsing line, or \g or 
> \g\ or something like that, I think it means global... 
> _______________________________________________ 
> Boost-users mailing list 
> B 
> oost-users_at_[hidden]http://lists.boost.org/mailman/listinfo.cgi/boost-users 
>  
>