GetRegexMatches is a Boost.Regex code snippet to obtain all std::strings in a std::string that satisfy a regular expression.

GetRegexMatches is demonstrated in the tool RegexTester.


//From http://www.richelbilderbeek.nl/CppGetRegexMatches.htm

const std::vector<std::string> GetRegexMatches(

  const std::string& s,

  const boost::regex& r)

{

  std::vector<std::string> v;



  std::string::const_iterator start = s.begin();

  const std::string::const_iterator end = s.end();

  boost::match_results<std::string::const_iterator> what;

  boost::match_flag_type flags = boost::match_default;

  while(boost::regex_search(start, end, what, r, flags))

  {

    const std::string x = what.str();

    v.push_back(x);

    start = what[0].second;

    flags |= boost::match_prev_avail;

    flags |= boost::match_not_bob;

  }

  return v;

}

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(C++) GetRegexMatches