clang/test/SemaCXX/no-rtti-data.cpp

   1 // RUN: %clang_cc1 %s -triple x86_64-unknown-linux -fno-rtti-data -fsyntax-only -verify
   2
   3 namespace std {
   4 struct type_info {};
   5 } // namespace std
   6 class B {
   7 public:
   8   virtual ~B() = default;
   9 };
  10
  11 class D1 : public B {
  12 public:
  13   ~D1() = default;
  14 };
  15
  16 void f() {
  17   B *b = new D1();
  18   auto d = dynamic_cast<D1 *>(b); // expected-warning{{dynamic_cast will not work since RTTI data is disabled by -fno-rtti-data}}
  19   void *v = dynamic_cast<void *>(b);
  20
  21   (void)typeid(int);
  22   (void)typeid(b);
  23   (void)typeid(*b); // expected-warning{{typeid will not work since RTTI data is disabled by -fno-rtti-data}}
  24   B b2 = *b;
  25   (void)typeid(b2);
  26   (void)typeid(*&b2); // expected-warning{{typeid will not work since RTTI data is disabled by -fno-rtti-data}}
  27   (void)typeid((B &)b2);
  28
  29   B &br = b2;
  30   (void)typeid(br); // expected-warning{{typeid will not work since RTTI data is disabled by -fno-rtti-data}}
  31   (void)typeid(&br);
  32 }