class RDoc::Parser::Ruby

def get_constant
  res = ""
  skip_tkspace_without_nl
  tk = get_tk
  while tk && ((:on_op == tk[:kind] && '::' == tk[:text]) || :on_const == tk[:kind]) do
    res += tk[:text]
    tk = get_tk
  end
  unget_tk(tk)
  res
end