enum Password {
case number(Int, Int, Int, Int)
case other
}

MemoryLayout<Password>.stride//40，分配占用的空间大小
MemoryLayout<Password>.size1/33，实际用到的空间大小
MemoryLayout<Passwords.alignment//8，对齐参数

var age = 10

//MemoryLayout<Int>.size
//MemoryLayout<Int>.stride
//MemoryLayout<Int>.alignment

//MemoryLayout.size(ofValue: age)
//MemoryLayout.stride(ofValue: age)
//MemoryLayout.alignment(ofValue: age)
enum Password {
    case number (Int, Int, Int, Int) // 32
    case other // 1
}

var pwd = Password.number (5, 6, 4, 7) // 40
pwd = .other

MemoryLayout<Password>.size // 33
MemoryLayout<Password>.stride // 40
MemoryLayout<Password>.alignment // 8