1 //===-------------------------- test_aux_runtime.cpp ----------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: libcxxabi-no-exceptions 11 12 #include <typeinfo> 13 #include <iostream> 14 15 // Test taken from 5.2.8.2 16 // When typeid is applied to a glvalue expression whose type is a polymorphic 17 // class type, (10.3), the result refers to a std::type_info object 18 // representing the type of the most derived object (1.8) (that is, the 19 // dynamic type) to which the glvalue refers. If the glvalue expression is 20 // obtained by applying the unary * operator to a pointer(68) and the pointer 21 // is a null pointer value (4.10), the typeid expression throws the 22 // std::bad_typeid exception (18.7.3). 23 // 24 // 68) If p is an expression of pointer type, then *p, (*p), *(p), 25 // ((*p)), *((p)), and so on all meet this requirement. 26 bool bad_typeid_test () { 27 class A { virtual void f() {}}; 28 class B { virtual void g() {}}; 29 30 B *bp = NULL; 31 try {bool b = typeid(*bp) == typeid (A); ((void)b); } 32 catch ( const std::bad_typeid &) { return true; } 33 return false; 34 } 35 36 37 // The value of a failed cast to pointer type is the null pointer value of 38 // the required result type. A failed cast to reference type throws 39 // std::bad_cast (18.7.2). 40 bool bad_cast_test () { 41 class A { virtual void f() {}}; 42 class B { virtual void g() {}}; 43 class D : public virtual A, private B {}; 44 45 D d; 46 B *bp = (B*)&d; // cast needed to break protection 47 try { D &dr = dynamic_cast<D&> (*bp); ((void)dr); } 48 catch ( const std::bad_cast & ) { return true; } 49 return false; 50 } 51 52 int main ( ) { 53 int ret_val = 0; 54 55 if ( !bad_typeid_test ()) { 56 std::cerr << "TypeID test failed!" << std::endl; 57 ret_val = 1; 58 } 59 60 if ( !bad_cast_test ()) { 61 std::cerr << "Bad cast test failed!" << std::endl; 62 ret_val = 1; 63 } 64 65 return ret_val; 66 } 67
