#include <boost/regex.hpp>
#include <string>
#include <iostream>

using namespace boost;
using namespace std;

regex expression1("dpkg-(old|dist|new|tmp)$", regex::extended);
regex expression2(".*dpkg-(old|dist|new|tmp)$", regex::extended);

int main ()
{
  std::string value("foobar.dpkg-old");

  if (regex_match(value, expression1))
    cout << "It matched the first" << endl;
  else
    cout << "It didn't match the first" << endl;

  if (regex_match(value, expression2))
    cout << "It matched the second" << endl;
  else
    cout << "It didn't match the second" << endl;
  return 0;
}