lor, C++ (vc++) - rextester

Language: Layout:

#include <iostream>
using namespace std;
struct asteroid;
struct bullet;
struct spaceship;

#define DECLARE_MM(x) virtual void collide(x& other) = 0;
#define DEFINE_MM(x) void collide(x& other) final
#define DELEGATE_MM(x) void collide(x& other) final { other.collide(*this); }
#define END_THING };
#define THING(x) struct x: thing { void collide(thing& other) { other.collide(*this); }

int boom = 0;
int go = 0;

struct thing {
   DECLARE_MM(asteroid)
   DECLARE_MM(bullet)
   DECLARE_MM(spaceship)
   DECLARE_MM(thing)
};

THING(asteroid)
   DEFINE_MM(asteroid) {}
   DEFINE_MM(bullet) { ++boom; }
   DEFINE_MM(spaceship) { ++go; }
END_THING

THING(bullet)
   DELEGATE_MM(asteroid)
   DEFINE_MM(bullet) {}
   DEFINE_MM(spaceship) {}
END_THING

THING(spaceship)
   DELEGATE_MM(asteroid)
   DEFINE_MM(bullet) {}
   DEFINE_MM(spaceship) {}
END_THING

int main() {
   asteroid a;
   bullet b;
   spaceship s;

for(int i = 0;i < 100000000;++i) {
      b.collide(static_cast<thing&>(a));
      s.collide(static_cast<thing&>(a));
   }
    
   cout << boom << ' ' << go << endl;
}

Show compiler warnings [ + ] Compiler args [ + ] Show input
Compilation time: 1,64 sec, absolute running time: 1,31 sec, absolute service time: 2,97 sec