libvtv/testsuite/libvtv.cc/virtual_inheritance.cc

   1 // { dg-do run }
   2
   3 #include <assert.h>
   4 struct V {
   5   V(): virtual_value(-123) {}
   6   int virtual_value;
   7   virtual int access_vv() { return virtual_value; }
   8 };
   9
  10 struct A: virtual public V {
  11   A():value(123) {}
  12     int value;
  13     virtual int access() { return value; }
  14 };
  15 struct B: virtual public V {
  16   B():value(456) {}
  17     int value;
  18     virtual int access() { return value; }
  19 };
  20 struct C : public A, public B {
  21   C():better_value(789) {}
  22     int better_value;
  23     virtual int access() { return better_value; }
  24 };
  25 struct D: public A, public B {
  26   D():better_virtual_value(-345) {}
  27   int better_virtual_value;
  28   virtual int access_vv() { return better_virtual_value; }
  29 };
  30
  31 int use(B *b)
  32 {
  33     return b->access();
  34 }
  35
  36 int v_use(V * v)
  37 {
  38   return v->access_vv();
  39 }
  40
  41 int main()
  42 {
  43   C c;
  44   assert(v_use(&c) == -123);
  45   D d;
  46   assert(v_use(&d) == -345);
  47   return 0;
  48 }