[boost] problem with subexpressions

From: Jadhav, Rahul (Rahul) (rjadhav_at_[hidden])
Date: 2004-08-03 02:13:55

>  -----Original Message-----
> From: 	Jadhav, Rahul (Rahul)  
> Sent:	Tuesday, August 03, 2004 12:33 PM
> To:	'boost_at_[hidden]'
> Subject:	problem with subexpressions 
> 
> Hi All,
>    I am not sure if I m doing wrong or there is some problem with library. I want to extract "f23" and "this is corresponding text" from string "f23 : this is corresponding text" 
> so I have written regular expression "(f[0-9]{1,})\\s*:\\s*(.*)" so that in match[0] is should have index information for first subexpression and should give me indices of "f23"
> but it gives me whole string as first subexpression. 
> 
>    It may be my mistake but I have spent 2 days and nights on this thing so I thought I should post it. Also I tried to find out a topic related to subexpressions on the mailing list but could not find one. below is the code.
> 
> regex_t preg;
> regmatch_t match[3];
> 	
> if(regcompW(&preg,L"(f[0-9]{1,})\\s*:\\s*(.*)",REG_ICASE|REG_EXTENDED)==0)
> 		 AfxMessageBox(L"successful");
> CString str=L"f23 : this is corresponding text";
> 
>  wchar_t* ptr=str.GetBuffer(str.GetLength());
> 
>  if(regexecW(&preg,ptr,3,match,0)!=REG_NOMATCH)
>  {
> 	int i=0;
> 	while(i<3)
> 	{
> 		wchar_t arr[200];
> 		wcsncpy(arr,(ptr+match[i].rm_so),match[i].rm_eo-match[i].rm_so);
> 		arr[match[i].rm_eo-match[i].rm_so]='\0';
> 		ptr=ptr+match[i].rm_eo;
> 		AfxMessageBox(arr);
> 		//AfxMessageBox(ptr);
> 		i++;
> 	}
>  }
> 
> 
> Thanks
> Rahul Jadhav
> 
> 
> 
> 
>