public function regex()
    {
        if ($this->_regex !== null) {
            return $this->_regex;
        }
        $this->_compile();
        return $this->_regex;
    }
public function regex()
    {
        if ($this->_regex !== null) {
            return $this->_regex;
        }
        $this->_compile();
        return $this->_regex;
    }
public function regex ( ) { if ( $ this -> _regex !== null ) { return $ this -> _regex ; } $ this -> _compile ( ) ; return $ this -> _regex ; }
Gets the route's regular expression pattern.

@return string the route's regular expression pattern.
Gets the route s regular expression pattern .