BITS
#define BITS(t) (CHAR_BIT * sizeof(t))
#define BITS (8 * sizeof (int))
#define BITS(n) \
#define BITS(n) \
#define BITS 16 /* Default bits. */
#define BITS(n) \
#define BITS(n) \
#define BITS 16 /* Default bits. */
#define BITS "default_bits"
#define BITS (sizeof(CHAR_T) * 8)