用于进行gcc测试

				// { dg-do compile }								// Copyright (C) 2003 Free Software Foundation, Inc.				// Contributed by Nathan Sidwell 3 Jul 2003 								// PR c++ 9162. default args got left unprocessed								struct S {				  friend int foo (const S&, int = 100);				};				S s;				int i = foo (s);								struct R				{				  template  R (T, int = 0);				};								int Foo ()				{				  R s (1);				}								template  struct Q				{				  int Foo (T, int = 0);				};								int Foo (Q *s)				{				  s->Foo (1);				}