100                     let intermediate =  localVariable
103                     if intermediate == 0 {
106                         Some(intermediate.trailing_zeros() as usize)
116                     let intermediate = (*bits | ((1 << (index + 1)) - 1));  localVariable
118                     if intermediate == <$target>::MAX {
121                         Some(intermediate.trailing_ones() as usize)
131                     let intermediate = bits & ((1 << index) - 1);  localVariable
133                     if intermediate == 0 {
136                         Some(<$target>::BITS as usize - 1 - (intermediate.leading_zeros() as usize))
146                     let intermediate = bits | (<$target>::MAX.overflowing_shl(index as u32).0);  localVariable
148                     if intermediate == <$target>::MAX {
151                         Some(<$target>::BITS as usize - 1 - (intermediate.leading_ones() as usize))