1/* Copyright (C) 2000 Free Software Foundation */ 2/* by Alexandre Oliva <aoliva@redhat.com> */ 3 4enum foo { FOO, BAR }; 5 6/* Even though the underlying type of an enum is unspecified, the type 7 of enumeration constants is explicitly defined as int (6.4.4.3/2 in 8 the C99 Standard). Therefore, `i' must not be promoted to 9 `unsigned' in the comparison below; we must exit the loop when it 10 becomes negative. */ 11 12int 13main () 14{ 15 int i; 16 for (i = BAR; i >= FOO; --i) 17 if (i == -1) 18 abort (); 19 20 exit (0); 21} 22 23