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//===-------------------------- 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: 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;
}
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