uri.cpp

static const boost::regex::flag_type rx_flags =
    boost::regex_constants::perl|
    boost::regex_constants::icase|
    boost::regex_constants::optimize|
    boost::regex_constants::collate;
static boost::regex regex_tcp_v4("((([^:]+)?(:([^@]+))?@)?([^\\/\\?:]+)(:(\\d+))?)?(\\/([^\\?]+)?)?(\\?(.*))?$", rx_flags);
static boost::regex regex_tcp_v6("((([^:]+)?(:([^@]+))?@)?(\\[[:\\da-f]+\\])(:(\\d+))?)?(\\/([^\\?]+)?)?(\\?(.*))?$", rx_flags);
static boost::regex regex_unix("((([^:]+)?(:([^@]+))?@)?([^:?:]+)(:([^\\?]+))?)?(\\?(.*))?", rx_flags);
static boost::regex regex_query("([-\\w+%]+)=([^&;]*)", rx_flags);
static boost::regex regex_is_v6("\\[[\\:\\da-f]+\\]", rx_flags);

/*
erase(0, "tcp://")
  [3]  user
  [5]  password
  [6]  host
  [8]  port
  [10] dbname
  [12] query
erase(0, unix://)
  [3]  user
  [5]  password
  [8]  socket
  [10] query
*/