B
#define B ((int)1 << (unsigned int)HALF_BITS) /* digit base */
#define B(seq) (1 << (seq & 0x07)) /* bit in byte */
#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
#define B 0x48000000
#define B 1
volatile enum { A, B } x = A;
B
enum { A, B, C } tag;
enum B {
enum B {
B