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