Re: Problems with regex_match()

From: Mayo (g17mayo_at_[hidden])
Date: 2001-06-07 06:28:44

--- In boost_at_y..., John Maddock <John_Maddock_at_c...> wrote:
> 
> >The problem I am facing is that although I use regex_match() 
> >similarly with the example in the documantation, it seems that 
> >regex_match() returns always false.
> 
> In which case it is not finding a match: the most likely senario is 
that
> there is something wrong with your regular expression: can please 
give an
> example of the regex used, and an actual message that you think it 
should
> match (not generalisations).
> 
> 
> - John Maddock
> http://ourworld.compuserve.com/homepages/john_maddock/

Hi,

Thanks for your reply.

This is the piece of code I have wrote

---------------------------------------------------------------------

bool __fastcall CDecoder::MatchCheck( char *message )
{
    using namespace boost;

    const char *e_string = DlgFilter->CreateRegEx().c_str();
    regex match_exp(e_string);

    cmatch what;
    if ( regex_match(message, what, match_exp, match_default) )
    {
        return true;
    }
    else
    {
        return false;
    }
}

//DlgFilter->CreateRegEx() returns an AnsiString of this format: 

"tx_seq_num = 3" 

A message that contains the above field looks exactly like the 
following:

                  tx_seq_num = 3
                 ack_seq_num = 2
            active_link_flag = 1
          packet_stored_flag = 0
              to_device_type = 2
            to_device_number = 21
            from_device_type = 1
          from_device_number = 11
                 packet_type = 1
             packet_sub_type = 0
         packet_service_type = 0

Even If I replace the line: 'regex match_exp(e_string);' with 
'regex match_exp("tx_seq_num = 3");' I still don't get no matches

I am developing the application using Borland C++ 4.0

Any ideas?

Thanks again for your time

Regards,

George