pr44861.cc

   1 // { dg-do compile }
   2
   3 bool f();
   4
   5 struct counted_base {
   6     virtual void destroy() { }
   7     void release() { if (f()) destroy(); }
   8 };
   9
  10 struct shared_count {
  11     shared_count() { }
  12     ~shared_count() { if (pi) pi->release(); }
  13     shared_count(shared_count& r) : pi(r.pi) { if (pi) pi->release(); }
  14     counted_base* pi;
  15 };
  16
  17 struct Foo;
  18
  19 struct shared_ptr  {
  20     Foo& operator*() { return *ptr; }
  21     Foo* ptr;
  22     shared_count refcount;
  23 };
  24
  25 struct Bar {
  26     Bar(Foo&, shared_ptr);
  27 };
  28
  29 void g() {
  30     shared_ptr foo;
  31     new Bar(*foo, foo);
  32 }
  33
  34 // { dg-final { cleanup-tree-dump "vect" } }