warning2.c

来自「this is a gcc file, you can download it 」· C语言 代码 · 共 15 行

// g++ ought to warn about casting a base pointer to a derived reference.
// Build don't link:

struct A {
  virtual void f () = 0;
};

struct B: public A { void f () { } };

int main()
{
  B* bp;
  A& ar = (A&)bp;		// WARNING - 
}