Generates forwarding state rules.

    The lexer will fast forward until there is string content. The
    string content will be returned to the string processor.

def GenFwdState(self):
    """Generates forwarding state rules.

    The lexer will fast forward until there is string content. The
    string content will be returned to the string processor.
    """
    for c in self.cont:
      self._AddToken("FWD", c, None, None)
    for s in self.sep:
      self._AddToken("FWD", s, None, None)
    self._AddToken("FWD", ".", "PushBack,PopState", None)