Generic Operator

# >>(_:_:)

Returns the result of shifting a value’s binary representation the specified number of digits to the right.

## Parameters

lhs

The value to shift.

rhs

The number of bits to shift lhs to the right.

## Discussion

The >> operator performs a smart shift, which defines a result for a shift of any value.

• Using a negative value for rhs performs a left shift using abs(rhs).

• Using a value for rhs that is greater than or equal to the bit width of lhs is an overshift. An overshift results in -1 for a negative value of lhs or 0 for a nonnegative value.

• Using any other value for rhs performs a right shift on lhs by that amount.

The following example defines x as an instance of UInt8, an 8-bit, unsigned integer type. If you use 2 as the right-hand-side value in an operation on x, the value is shifted right by two bits.

If you use 11 as rhs, x is overshifted such that all of its bits are set to zero.

Using a negative value as rhs is the same as performing a left shift using abs(rhs).

Right shift operations on negative values “fill in” the high bits with ones instead of zeros.