dcast2.c

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· C语言 代码 · 共 18 行

// { dg-do assemble  }

// Based on a testcase by Ruslan Shevchenko <[e-mail]>

struct B {
  virtual ~B();
};

struct D : public B {
};

void foo() {
  B x;
  dynamic_cast<D*>(&x); // { dg-warning "" } will never succeed
  B* p = &x;
  dynamic_cast<D*>(p);
}