用于进行gcc测试

				// { dg-do compile }				// Origin: Giovanni Bajo 				// DR161: Access to protected nested type 								namespace N1 {				  struct A 				  {				  protected:				    typedef int type;				  };								  struct B : public A				  {				    void test(void)				    {				      A::type t;				    }								    friend void ftest(void)				    {				      A::type t;				    }				  };				}												namespace N2 {				  template 				  struct A 				  {				  protected:				    typedef int type;				  };								  template 				  struct B : public A				  {				    void test(B b)				    {				      typename A::type t;				    }								    friend void ftest(B b)				    {				      typename A::type t;				    }				  };								  template struct B;				}