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

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// RUN: %clang_cc1 %s -triple x86_64-unknown-linux -fno-rtti-data -fsyntax-only -verify
namespace std {
struct type_info {};
} // namespace std
class B {
public:
virtual ~B() = default;
};
class D1 : public B {
public:
~D1() = default;
};
void f() {
B *b = new D1();
auto d = dynamic_cast<D1 *>(b); // expected-warning{{dynamic_cast will not work since RTTI data is disabled by -fno-rtti-data}}
void *v = dynamic_cast<void *>(b);
(void)typeid(int);
(void)typeid(b);
(void)typeid(*b); // expected-warning{{typeid will not work since RTTI data is disabled by -fno-rtti-data}}
B b2 = *b;
(void)typeid(b2);
(void)typeid(*&b2); // expected-warning{{typeid will not work since RTTI data is disabled by -fno-rtti-data}}
(void)typeid((B &)b2);
B &br = b2;
(void)typeid(br); // expected-warning{{typeid will not work since RTTI data is disabled by -fno-rtti-data}}
(void)typeid(&br);
}