Swift 4 - 表达太复杂，无法在合理的时间内解决

Question

转向Swift 4，给出错误＆＃34;表达式太复杂，无法在合理的时间内解决;考虑将表达式分解为不同的子表达式＆＃34;

let value =
  Int(topLeft.hashValue) |
  Int(topRight.hashValue) << 1 |
  Int(bottomLeft.hashValue) << 2 |
  Int(bottomRight.hashValue) << 3

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Answer 1

var value = topLeft.hashValue
    value = value | topRight.hashValue << 1
    value = value | bottomLeft.hashValue << 2
    value = value | bottomRight.hashValue << 3