struct A
{
   virtual const int* f() = 0;
};

struct B : public A
{
   const int* f()
   { return 0; }
   template<class FT> const FT* f()
   { return 0; }
};

int main()
{
   B b;
   b.f();
   b.f<double>();
   return 0;
}

struct A
{
   virtual const int* f() = 0;
   template<class FT> const FT* f()
   { return 0; }
};

struct B : public A
{
   const int* f()
   { return 0; }
};

int main()
{
   B b;
   b.f();
   b.f<double>();
   return 0;
}