老师你好，看你到你再runtime章节讲到的
objc_object
isa_t ，关于isa操作相关， 弱引用相关 ，关联对象相关 ，内存管理相关
object_class
…

和查看objc.h中所呈现的不太一样
struct objc_object {
Class _Nonnull isa OBJC_ISA_AVAILABILITY;
};

struct objc_class {
Class _Nonnull isa OBJC_ISA_AVAILABILITY;

#if !OBJC2
Class _Nullable super_class OBJC2_UNAVAILABLE;
const char * _Nonnull name OBJC2_UNAVAILABLE;
long version OBJC2_UNAVAILABLE;
long info OBJC2_UNAVAILABLE;
long instance_size OBJC2_UNAVAILABLE;
struct objc_ivar_list * _Nullable ivars OBJC2_UNAVAILABLE;
struct objc_method_list * _Nullable * _Nullable methodLists OBJC2_UNAVAILABLE;
struct objc_cache * _Nonnull cache OBJC2_UNAVAILABLE;
struct objc_protocol_list * _Nullable protocols OBJC2_UNAVAILABLE;
#endif

} OBJC2_UNAVAILABLE;

转成c++也是没有，请问您是怎么查看的？