Return a mask with all bits below index set.
Declared in <bdlb_bitmaskutil.h>
static
uint64_t
lt64(int index);Return the unsigned integral value having all bits at positions less than the specified index set to 1, and all other bits set to 0. The behavior is undefined unless 0 <= index <= # of bits in result.
mask with all bits below index set
| Name | Description |
|---|---|
| index | bit position below which bits are set |