MetadataKind = Metadata的type

Swift中Metadata的Type == MetadataKind 的定义

图

• MetadataKind的定义 表格
  • 
    • == Swift的ValueMetadata和VWT的内存布局图中的MetadataKind的表格

核心代码

const unsigned MetadataKindIsNonType = 0x400;
const unsigned MetadataKindIsNonHeap = 0x200;
const unsigned MetadataKindIsRuntimePrivate = 0x100;

LastEnumerated = 0x7FF,

NOMINALTYPEMETADATAKIND(Class, 0)
NOMINALTYPEMETADATAKIND(Struct, 0 | MetadataKindIsNonHeap)
NOMINALTYPEMETADATAKIND(Enum, 1 | MetadataKindIsNonHeap)
NOMINALTYPEMETADATAKIND(Optional, 2 | MetadataKindIsNonHeap)
METADATAKIND(ForeignClass, 3 | MetadataKindIsNonHeap)
METADATAKIND(Opaque, 0 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
METADATAKIND(Tuple, 1 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
METADATAKIND(Function, 2 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
METADATAKIND(Existential, 3 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
METADATAKIND(Metatype, 4 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
METADATAKIND(ObjCClassWrapper, 5 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
METADATAKIND(ExistentialMetatype, 6 | MetadataKindIsRuntimePrivate | MetadataKindIsNonHeap)
METADATAKIND(HeapLocalVariable, 0 | MetadataKindIsNonType)
METADATAKIND(HeapGenericLocalVariable, 0 | MetadataKindIsNonType | MetadataKindIsRuntimePrivate)
METADATAKIND(ErrorObject, 1 | MetadataKindIsNonType | MetadataKindIsRuntimePrivate)

表格