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 #include <typeinfo>
11 #include <stdio.h>
12
13 // Test taken from 5.2.8.2
14 // When typeid is applied to a glvalue expression whose type is a polymorphic
15 // class type, (10.3), the result refers to a std::type_info object
16 // representing the type of the most derived object (1.8) (that is, the
17 // dynamic type) to which the glvalue refers. If the glvalue expression is
18 // obtained by applying the unary * operator to a pointer(68) and the pointer
19 // is a null pointer value (4.10), the typeid expression throws the
20 // std::bad_typeid exception (18.7.3).
21 //
22 // 68) If p is an expression of pointer type, then *p, (*p), *(p),
23 // ((*p)), *((p)), and so on all meet this requirement.
bad_typeid_test()24 bool bad_typeid_test () {
25 class A { virtual void f() {}};
26 class B { virtual void g() {}};
27
28 B *bp = NULL;
29 try {bool b = typeid(*bp) == typeid (A); }
30 catch ( const std::bad_typeid &bc ) { return true; }
31 return false;
32 }
33
34
35 // The value of a failed cast to pointer type is the null pointer value of
36 // the required result type. A failed cast to reference type throws
37 // std::bad_cast (18.7.2).
bad_cast_test()38 bool bad_cast_test () {
39 class A { virtual void f() {}};
40 class B { virtual void g() {}};
41 class D : public virtual A, private B {};
42
43 D d;
44 B *bp = (B*)&d; // cast needed to break protection
45 try { D &dr = dynamic_cast<D&> (*bp); }
46 catch ( const std::bad_cast &bc ) { return true; }
47 return false;
48 }
49
main(int argc,char * argv[])50 int main ( int argc, char *argv [] ) {
51 int ret_val = 0;
52
53 if ( !bad_typeid_test ()) {
54 fprintf(stderr, "TypeID test failed!\n");
55 ret_val = 1;
56 }
57
58 if ( !bad_cast_test ()) {
59 fprintf(stderr, "Bad cast test failed!\n");
60 ret_val = 1;
61 }
62
63 return ret_val;
64 }
65