class RDoc::Parser::Ruby

def parse_visibility(container, single, tk)
  singleton = (single == SINGLE)
  vis_type = tk.name
  vis = case vis_type
        when 'private'   then :private
        when 'protected' then :protected
        when 'public'    then :public
        when 'private_class_method' then
          singleton = true
          :private
        when 'public_class_method' then
          singleton = true
          :public
        when 'module_function' then
          singleton = true
          :public
        else
          raise RDoc::Error, "Invalid visibility: #{tk.name}"
        end
  skip_tkspace_comment false
  case peek_tk
    # Ryan Davis suggested the extension to ignore modifiers, because he
    # often writes
    #
    #   protected unless $TESTING
    #
  when TkNL, TkUNLESS_MOD, TkIF_MOD, TkSEMICOLON then
    container.ongoing_visibility = vis
  else
    if vis_type == 'module_function' then
      args = parse_symbol_arg
      container.set_visibility_for args, :private, false
      module_functions = []
      container.methods_matching args do |m|
        s_m = m.dup
        s_m.singleton = true if RDoc::AnyMethod === s_m
        s_m.visibility = :public
        module_functions << s_m
      end
      module_functions.each do |s_m|
        case s_m
        when RDoc::AnyMethod then
          container.add_method s_m
        when RDoc::Attr then
          container.add_attribute s_m
        end
      end
    else
      args = parse_symbol_arg
      container.set_visibility_for args, vis, singleton
    end
  end
end