Swift 5 MemoryLayout

MemoryLayout

• 获取数据类型占用内存的大小

var age = 10


MemoryLayout<Int>.size //实际占用的内存大小
MemoryLayout<Int>.stride //分配的内存大小
MemoryLayout<Int>.alignment //内存对齐参数

MemoryLayout<Int>.size(ofValue: age)
MemoryLayout<Int>.stride(ofValue: age)
MemoryLayout<Int>.alignment(ofValue: age)

enum Season {
    case spring, summer
}

var s = Season.spring
MemoryLayout<Season>.size(ofValue: s)
MemoryLayout<Season>.stride(ofValue: s)
MemoryLayout<Season>.alignment(ofValue: s)