Returns the result of shifting a value’s binary representation the specified number of digits to the left.
static func << <Other>(lhs: Self, rhs: Other) -> Self where Other : BinaryInteger
The value to shift.
The number of bits to shift
lhsto the left.
<< operator performs a smart shift, which defines a result for a shift of any value.
Using a negative value for
rhsperforms a right shift using
Using a value for
rhsthat is greater than or equal to the bit width of
lhsis an overshift, resulting in zero.
Using any other value for
rhsperforms a left shift on
lhsby 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 left by two bits.
let x: UInt8 = 30 // 0b00011110 let y = x << 2 // y == 120 // 0b01111000
If you use
x is overshifted such that all of its bits are set to zero.
let z = x << 11 // z == 0 // 0b00000000
Using a negative value as
rhs is the same as performing a right shift with
let a = x << -3 // a == 3 // 0b00000011 let b = x >> 3 // b == 3 // 0b00000011