| //===-------------------------- test_aux_runtime.cpp ----------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: libcxxabi-no-exceptions |
| |
| #include <typeinfo> |
| #include <iostream> |
| |
| // Test taken from 5.2.8.2 |
| // When typeid is applied to a glvalue expression whose type is a polymorphic |
| // class type, (10.3), the result refers to a std::type_info object |
| // representing the type of the most derived object (1.8) (that is, the |
| // dynamic type) to which the glvalue refers. If the glvalue expression is |
| // obtained by applying the unary * operator to a pointer(68) and the pointer |
| // is a null pointer value (4.10), the typeid expression throws the |
| // std::bad_typeid exception (18.7.3). |
| // |
| // 68) If p is an expression of pointer type, then *p, (*p), *(p), |
| // ((*p)), *((p)), and so on all meet this requirement. |
| bool bad_typeid_test () { |
| class A { virtual void f() {}}; |
| class B { virtual void g() {}}; |
| |
| B *bp = NULL; |
| try {bool b = typeid(*bp) == typeid (A); ((void)b); } |
| catch ( const std::bad_typeid &) { return true; } |
| return false; |
| } |
| |
| |
| // The value of a failed cast to pointer type is the null pointer value of |
| // the required result type. A failed cast to reference type throws |
| // std::bad_cast (18.7.2). |
| bool bad_cast_test () { |
| class A { virtual void f() {}}; |
| class B { virtual void g() {}}; |
| class D : public virtual A, private B {}; |
| |
| D d; |
| B *bp = (B*)&d; // cast needed to break protection |
| try { D &dr = dynamic_cast<D&> (*bp); ((void)dr); } |
| catch ( const std::bad_cast & ) { return true; } |
| return false; |
| } |
| |
| int main ( ) { |
| int ret_val = 0; |
| |
| if ( !bad_typeid_test ()) { |
| std::cerr << "TypeID test failed!" << std::endl; |
| ret_val = 1; |
| } |
| |
| if ( !bad_cast_test ()) { |
| std::cerr << "Bad cast test failed!" << std::endl; |
| ret_val = 1; |
| } |
| |
| return ret_val; |
| } |