[Boost-users] Regex - hyperlink match/submatch problem

From: Jeff (jeff_j_dunlap_at_[hidden])
Date: 2007-04-10 15:51:30

Dear forum members:

I’m hoping that someone can copy and compile the code below and tell me what is 
wrong with my expression.  I am trying to write a pattern that produces the 
following match and submatch:

MATCH:
<a href="http://test1.com">TEST #1</a>

SUBMATCH:
http://test1.com

// main.cpp

#include <boost/regex.hpp>
#include <iostream>
using namespace std;
using namespace boost;

int main() {

// here is the data, please note the minor ‘href=’ differences.
string sText = 
"<a href=\"http://test1.com\">TEST #1</a>"
"<a href =\"http://test2.com\">TEST #2</a>"
"<a href= \"http://test3.com\">TEST #3</a>"
"<a href = \"http://test4.com\">TEST #4</a>"
"<a href=\"http://test5.com\">TEST #5</a>";

// the following 4 patterns were my bet attempts
char exp[] = 
"<a href(.*?)</a>";             
"<a href\s*=\s*\"(.*?)\"";
"<a href=(.*?)</a>";
"<a href\s*=\s*\"(.*?)</a>"

int subs[] = {0,1};

    regex e(exp, regex::normal | regbase::icase);
    sregex_token_iterator i(sText.begin(), sText.end(), e, subs); 
    sregex_token_iterator j;
    while(i != j) {
          cout << "*******************************" << endl;
      cout << *i++ << endl;
      cout << *i++ << endl;
    }

  return 0;
}