operator: >>
Bitwise operations only make sense for integers. Negative numbers are treated
-as their 2's complement value (this assumes a sufficiently large number of bits
-that no overflow occurs during the operation).
+as their 2's complement value (this assumes that there are enough bits so that
+no overflow occurs during the operation).
The priorities of the binary bitwise operations are all lower than the numeric
operations and higher than the comparisons; the unary operation ``~`` has the