this is a gcc file, you can download it and learn its usetility, for further detail please look at t

				// Bug: g++ dies on this input.				// Build don't link:								class Sample				  {				 public:				  int operator 				  };								extern Sample sample;								struct Simple				  {				  int a;				  };								extern "C" void get_it();								class Test				  {				 private:				  void test();				  friend void get_it();				  };								void Test::test()				  {				  sample 				  }