fork(1) download 
  1. #include <iostream>
  2. #include <typeinfo>
  3.  
  4. using std::cout;
  5. using std::endl;
  6.  
  7. struct C;
  8.  
  9. struct B
  10. {
  11.     long unsigned int hash;
  12.  
  13.     B(C *c);
  14. };
  15.  
  16. struct C : B
  17. {
  18.     C() : B(this)
  19.     {
  20.         cout << "C()" << endl;
  21.     }
  22. };
  23.  
  24. B::B(C *c)
  25. {
  26.     hash = typeid(*c).hash_code(); //1, UB?
  27. }
  28.  
  29. C c;
  30. int main()
  31. {
  32.     cout << c.hash << endl;
  33.     cout << typeid(c).hash_code() << endl;
  34. }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin 
Standard input is empty
stdout 
C()
3641736028
3641736028
https://ideone.com/D4HoXo
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!