c++ - What does empty destructor do? -

c++ - What does empty destructor do? -

i heard empty destructor doesn't , calling doesn't remove object. in code:

#include <iostream> #include <set> class { public: ~a() {} std::set <int> myset; }; int main() { object; object.myset.insert(55); object.~a(); object.myset.insert(20); std::cout << object.myset.size(); }

i get: "* glibc detected * /.app: double free or corruption (fasttop):" , "abort".

if matters have c++11 flag enabled. empty constructor do? , read doesn't.

your destructor may empty, it's destructing fellow member variables. in case, it's destructing myset, subsequent insert(20) crashing.

if class had no non-pod fellow member variables empty destructor nothing.

c++ destructor