c++ 反射

//my_code.h#include<iostream>#include<string>using namespace std;class a{public: int val; int val2;};//refback.h (auto gen)template<typename T>class refback{public: template<typename Tret> static Tret T::* member(string){  return 0; }};template<>class refback<a>{public: template<typename Tret> static Tret a::* member(string name){  if(false){}  else if(name=="val"){return &a::val;} //auto gen  else if(name=="val2"){return &a::val2;} //auto gen  else{return 0;} }};//main.cppint main(int argc, char** argv){ a aa; aa.val=42; cout<<aa.*refback<a>::member<int>("val")<<endl; return 0;}