1// { dg-do run  }
2// Author: Alfred Miniarik <a8601248@unet.univie.ac.at>
3// test of dynamic_cast
4// runtime detecting of nonpublic
5// inheritance within a cast
6// and therefor failing with result 0.
7
8extern "C" void abort();
9extern "C" int printf (const char *, ...);
10
11static int errors = 0;
12void error(int i)
13{
14  printf("Error %i\n",i);
15  errors++;
16}
17
18// 1. downcast
19
20// 1.1. single inheritance case
21
22struct A {virtual ~A(){}};
23struct AA : A {};
24struct B : A {};
25struct BB : B {};
26class C : B {};
27struct D : C {};
28
29struct CC : B {};
30class DD : CC {};
31
32class CCC : protected B {};
33class DDD : protected CCC {};
34
35void
36test01 ()
37{
38  D d;
39  if(dynamic_cast<D*> ((A*)&d)) error(1);
40  if(dynamic_cast<D*> ((B*)&d)) error(2);
41  if(&d != dynamic_cast<D*> ((C*)&d)) error(3); //counter example
42  if(dynamic_cast<C*> ((B*)&d)) error(4);
43
44  DD dd;
45  if(dynamic_cast<DD*> ((A*)&dd)) error(5);
46  if(dynamic_cast<DD*> ((B*)&dd)) error(6);
47
48  DDD ddd;
49  if(dynamic_cast<DDD*> ((A*)&ddd)) error(7);
50  if(dynamic_cast<DDD*> ((B*)&ddd)) error(8);
51  if(dynamic_cast<CCC*> ((B*)&ddd)) error(9);
52}
53
54// 1.2. multiple inheritance case
55// 1.2.1. all bases are public
56
57struct E : D, CC {};
58struct EE : CC, D {}; //Will search in reverse order.
59
60void
61test02 ()
62{
63  E e;
64  if(dynamic_cast<E*> ((A*)(D*)&e)) error(10);
65  if(dynamic_cast<E*> ((B*)(D*)&e)) error(11);
66  if(&e != dynamic_cast<E*> ((C*)(D*)&e)) error(12); //counter example
67  if(&e != dynamic_cast<E*> ((B*)(CC*)&e)) error(13); //counter example
68  if((CC*)&e != dynamic_cast<CC*> ((B*)(CC*)&e)) error(14); //counter example
69
70  EE ee;
71  if(dynamic_cast<EE*> ((A*)(D*)&ee)) error(15);
72  if(dynamic_cast<EE*> ((B*)(D*)&ee)) error(16);
73  if(&ee != dynamic_cast<EE*> ((C*)(D*)&ee)) error(17); //counter example
74  if(&ee != dynamic_cast<EE*> ((B*)(CC*)&ee)) error(18); //counter example
75  if((CC*)&ee != dynamic_cast<CC*> ((B*)(CC*)&ee)) error(19); //counter example
76}
77
78// 1.2.2 one or more branches are nonpublic
79
80struct X : private BB, E {};
81struct Y : AA, private B {};
82
83class XX : BB, E {};
84
85void
86test03 ()
87{
88  X x;
89  if(&x != dynamic_cast<X*>((B*)(CC*)(E*)&x)) error(20); //counter example
90  XX xx;
91  if(dynamic_cast<XX*>((B*)(CC*)(E*)&xx)) error(21);
92  Y y;
93  if(dynamic_cast<Y*>((B*)&y)) error (22);
94  if(dynamic_cast<Y*>((A*)(B*)&y)) error (23);
95}
96
97// 2. crosscast
98
99struct J {virtual ~J(){};};
100struct K : CC, private J {};
101class KK : J, CC{};
102
103void
104test04 ()
105{
106  E e;
107  if(dynamic_cast<CC*> ((B*)(D*)&e)) error(24);
108  if((CC*)&e != dynamic_cast<CC*> ((C*)(D*)&e)) error(25); //counter example
109  K k;
110  if(dynamic_cast<J*> ((B*)&k)) error(26);
111  KK kk;
112  if(dynamic_cast<J*> ((CC*)&kk)) error(27);
113}
114
115int
116main ()
117{
118  test01();
119  test02();
120  test03();
121  test04();
122  return errors ? 1 : 0;
123}
124