class Module
  def private_module_function(*symbol)
    module_function *symbol
    private_class_method *symbol
  end
end

if __FILE__ == $0
  def show(code = nil)
    if code
      begin
	res = eval code, TOPLEVEL_BINDING
      rescue Exception => err
	res = err
      end
      puts "#{code}\t#=> #{res.inspect}"
    else
      puts
    end
  end
  
  show %{module M; def a() b() end;         module_function :a; end}
  show %{module M; def b() end;                               ; end}
  show %{M.a} #=> NameError
  show
  show %{module M; def b() end;             module_function :b; end}
  show %{M.a} #=> nil
  show %{M.b} #=> nil
  show
  show %{module M; def b() end;     private_module_function :b; end}
  show %{M.b} #=> NameError
end