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// { dg-do run }
// Author: Alfred Miniarik <a8601248@unet.univie.ac.at>
// test of dynamic_cast
// runtime detecting of valid
// downcasts within nonpublic
// baseclasses.
extern "C" void abort();
extern "C" int printf (const char *, ...);
static int errors = 0;
void error(int i)
{
printf("Error %i\n",i);
errors++;
}
// 1. downcast
// 1.1 single inheritance case
struct A {virtual ~A(){} int i;};
struct B : A {int i;};
struct C : B {int i;};
struct CC : C {};
class D : C {int i;};
struct E : D {int i;};
class F : E {int i;};
void
test01 ()
{
D d;
if((C*)&d != dynamic_cast<C*> ((A*)&d)) error(1);
if((C*)&d != dynamic_cast<C*> ((B*)&d)) error(2);
if((B*)&d != dynamic_cast<B*> ((A*)&d)) error(3);
E e;
if((C*)&e != dynamic_cast<C*> ((A*)&e)) error(4);
F f;
if((C*)&f != dynamic_cast<C*> ((B*)&f)) error(5);
if((B*)&f != dynamic_cast<B*> ((A*)&f)) error(6);
if((E*)&f != dynamic_cast<E*> ((D*)&f)) error(7);
if(dynamic_cast<E*> ((C*)&f)) error(8); //counter example
}
// 1.2 multiple inheritance case
struct G : CC, F{};
void
test02 ()
{
G g;
if((B*)(F*)&g != dynamic_cast<B*> ((A*)(F*)&g)) error(9);
if(dynamic_cast<D*> ((A*)(F*)&g)) error(10);
if(dynamic_cast<G*> ((B*)(F*)&g)) error(11);
}
// 2. crosscast (always fail)
struct I : C{};
struct J : F{};
struct K : I, J{};
class L : K{};
void
test03 ()
{
L l;
if(dynamic_cast<J*> ((I*)&l)) error(12);
if(dynamic_cast<J*> ((E*)&l)) error(13);
if(dynamic_cast<I*> ((J*)&l)) error(14);
}
int
main ()
{
test01();
test02();
test03();
return errors ? 1 : 0;
}
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