src/finger_tree.h
// 0-indexed into the mask bit array
0-indexed into the mask bit array
0 - indexed into the mask bit array
const static inline int
bit_set (BITMASK mask, int index)
{
	return (1 & (mask >> index)) != 0;
}
const static inline int bit_set ( BITMASK mask , int index ) { return ( 1 & ( mask >> index ) ) != 0 ; }
0-indexed into the mask bit array
0 - indexed into the mask bit array