Boost C++ Libraries

The following helper functions are provided to ease the conversion from an MFC/ATL string to a regex_iterator or regex_token_iterator:

regex_iterator creation helper

template <class charT>
regex_iterator<charT const*>
   make_regex_iterator(
      const ATL::CSimpleStringT<charT>& s,
      const basic_regex<charT>& e,
      ::boost::regex_constants::match_flag_type f = boost::regex_constants::match_default);

Effects: returns regex_iterator(s.GetString(), s.GetString() + s.GetLength(), e, f);

Example:

void enumerate_links(const CString& html)
{
   // enumerate and print all the  links in some HTML text,
   // the expression used is by Andew Lee on www.regxlib.com:
   boost::tregex r(
      __T("href=[\"\']((http:\\/\\/|\\.\\/|\\/)?\\w+"
          "(\\.\\w+)*(\\/\\w+(\\.\\w+)?)*"
          "(\\/|\\?\\w*=\\w*(&\\w*=\\w*)*)?)[\"\']"));
   boost::tregex_iterator i(boost::make_regex_iterator(html, r)), j;
   while(i != j)
   {
      std::cout << (*i)[1] << std::endl;
      ++i;
   }
}

regex_token_iterator creation helpers

template <class charT>
regex_token_iterator<charT const*>
   make_regex_token_iterator(
      const ATL::CSimpleStringT<charT>& s,
      const basic_regex<charT>& e,
      int sub = 0,
      ::boost::regex_constants::match_flag_type f = boost::regex_constants::match_default);

Effects: returns regex_token_iterator(s.GetString(), s.GetString() + s.GetLength(), e, sub, f);

template <class charT>
regex_token_iterator<charT const*>
   make_regex_token_iterator(
      const ATL::CSimpleStringT<charT>& s,
      const basic_regex<charT>& e,
      const std::vector<int>& subs,
      ::boost::regex_constants::match_flag_type f = boost::regex_constants::match_default);

Effects: returns regex_token_iterator(s.GetString(), s.GetString() + s.GetLength(), e, subs, f);

template <class charT, std::size_t N>
regex_token_iterator<charT const*>
   make_regex_token_iterator(
      const ATL::CSimpleStringT<charT>& s,
      const basic_regex<charT>& e,
      const int (& subs)[N],
      ::boost::regex_constants::match_flag_type f = boost::regex_constants::match_default);

Effects: returns regex_token_iterator(s.GetString(), s.GetString() + s.GetLength(), e, subs, f);

Example:

void enumerate_links2(const CString& html)
{
   // enumerate and print all the  links in some HTML text,
   // the expression used is by Andew Lee on www.regxlib.com:
   boost::tregex r(
         __T("href=[\"\']((http:\\/\\/|\\.\\/|\\/)?\\w+"
             "(\\.\\w+)*(\\/\\w+(\\.\\w+)?)*"
             "(\\/|\\?\\w*=\\w*(&\\w*=\\w*)*)?)[\"\']"));
   boost::tregex_token_iterator i(boost::make_regex_token_iterator(html, r, 1)), j;
   while(i != j)
   {
      std::cout << *i << std::endl;
      ++i;
   }
}