用于进行gcc测试

				/* { dg-do compile } */				/* { dg-options "-pedantic" } */								enum err {				  err_IO = 0x8a450000, /* { dg-warning "int" } */				  err_NM,				  err_EOF,				  err_SE,				  err_PT				};				static enum err E_;				int error()				{				  switch (E_) {				    case err_IO : break;  /* { dg-warning "overflow" } */				    case err_NM : break;  /* { dg-warning "overflow" } */				    case err_EOF : break; /* { dg-warning "overflow" } */				    case err_SE : break;  /* { dg-warning "overflow" } */				    case err_PT : break;  /* { dg-warning "overflow" } */				    default : return 0;				  }				}