Swift的Dictionary内存布局 文字

• Swift的Dictionary内存布局 = 字段 = 属性
  • [+0x00] = Metadata* type
  • [+0x08] = Int refCount
  • __RawDictionaryStorage
    • [+0x10] = var _count: Int
    • [+0x18] = var _capacity: Int
    • [+0x20] = Int
      • [+0x20~0x20] = var _scale: Int8
      • [+0x21~0x21] = var _reservedScale: Int8
      • [+0x22~0x23] = var _extra: Int16
      • [+0x24~0x27] = var _age: Int32
    • [+0x28] = var _seed: Int
    • [+0x30] = var _rawKeys: UnsafeMutableRawPointer
      • 指向Key=键的数组列表
    • [+0x38] = var _rawValues: UnsafeMutableRawPointer
      • 指向Value=值的数组列表
    • [+0x38] = int _metadata
      • 指定了哪几个index元素是有效数据