libvtv/testsuite/virtual_inheritance.cc

   1 #include <assert.h>
   2 struct V {
   3   V(): virtual_value(-123) {}
   4   int virtual_value;
   5   virtual int access_vv() { return virtual_value; }
   6 };
   7
   8 struct A: virtual public V {
   9   A():value(123) {}
  10     int value;
  11     virtual int access() { return value; }
  12 };
  13 struct B: virtual public V {
  14   B():value(456) {}
  15     int value;
  16     virtual int access() { return value; }
  17 };
  18 struct C : public A, public B {
  19   C():better_value(789) {}
  20     int better_value;
  21     virtual int access() { return better_value; }
  22 };
  23 struct D: public A, public B {
  24   D():better_virtual_value(-345) {}
  25   int better_virtual_value;
  26   virtual int access_vv() { return better_virtual_value; }
  27 };
  28
  29 int use(B *b)
  30 {
  31     return b->access();
  32 }
  33
  34 int v_use(V * v)
  35 {
  36   return v->access_vv();
  37 }
  38
  39 int main()
  40 {
  41   C c;
  42   assert(v_use(&c) == -123);
  43   D d;
  44   assert(v_use(&d) == -345);
  45   return 0;
  46 }