Stupid C++ Tricks

union_of_structs_and_classes_in_holy_matrimony.cpp

#include <stdio.h>

struct Foo {
  const int baz;
  Foo(const int baz) : baz(baz) {}
};

struct Qux : public Foo {
  Qux(const int baz) : Foo(baz) {}
};

class Bar : public Qux {
public:
  Bar(const int baz) : Qux(baz) {}
};

struct Quo : public Bar {
  Quo(const int baz) : Bar(baz) {}
};

int main(int argc, char *argv[]) {
  Quo quo(42);
  printf("The answer to life is: %d\n", quo.baz);
  return 0;
}