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leadingZeroBitCount

The number of leading zeros in this value’s binary representation.

Declaration

var leadingZeroBitCount: Int { get }

Discussion

For example, in a fixed-width integer type with a bitWidth value of 8, the number 31 has three leading zeros.

let x: Int8 = 0b0001_1111
// x == 31
// x.leadingZeroBitCount == 3

If the value is zero, then leadingZeroBitCount is equal to bitWidth.