linux下的gcc编译器

				// Copyright (C) 2001 Free Software Foundation, Inc.				// Contributed by Nathan Sidwell 26 Feb 2001 								// Bug 1981. using declarations in namespace scope were not remembered.								namespace A				{				  void swap () {}				};								template  void f()				{				  using A::swap;				}								template void f ();								int foo (int) { return 0;}								namespace B				{				  int foo (int) { return 1;}				  				  template  int baz ()				  {				    using ::foo;				    				    return foo (1);				  }				  template int baz ();				};								int main ()				{				  return B::baz ();				}