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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/g++.old-deja/g++.other/dyncast1.C
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+// { dg-do run }
+// Author: Alfred Miniarik <a8601248@unet.univie.ac.at>
+// test of dynamic_cast
+// runtime detecting of nonpublic
+// inheritance within a cast
+// and therefor failing with result 0.
+
+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(){}};
+struct AA : A {};
+struct B : A {};
+struct BB : B {};
+class C : B {};
+struct D : C {};
+
+struct CC : B {};
+class DD : CC {};
+
+class CCC : protected B {};
+class DDD : protected CCC {};
+
+void
+test01 ()
+{
+ D d;
+ if(dynamic_cast<D*> ((A*)&d)) error(1);
+ if(dynamic_cast<D*> ((B*)&d)) error(2);
+ if(&d != dynamic_cast<D*> ((C*)&d)) error(3); //counter example
+ if(dynamic_cast<C*> ((B*)&d)) error(4);
+
+ DD dd;
+ if(dynamic_cast<DD*> ((A*)&dd)) error(5);
+ if(dynamic_cast<DD*> ((B*)&dd)) error(6);
+
+ DDD ddd;
+ if(dynamic_cast<DDD*> ((A*)&ddd)) error(7);
+ if(dynamic_cast<DDD*> ((B*)&ddd)) error(8);
+ if(dynamic_cast<CCC*> ((B*)&ddd)) error(9);
+}
+
+// 1.2. multiple inheritance case
+// 1.2.1. all bases are public
+
+struct E : D, CC {};
+struct EE : CC, D {}; //Will search in reverse order.
+
+void
+test02 ()
+{
+ E e;
+ if(dynamic_cast<E*> ((A*)(D*)&e)) error(10);
+ if(dynamic_cast<E*> ((B*)(D*)&e)) error(11);
+ if(&e != dynamic_cast<E*> ((C*)(D*)&e)) error(12); //counter example
+ if(&e != dynamic_cast<E*> ((B*)(CC*)&e)) error(13); //counter example
+ if((CC*)&e != dynamic_cast<CC*> ((B*)(CC*)&e)) error(14); //counter example
+
+ EE ee;
+ if(dynamic_cast<EE*> ((A*)(D*)&ee)) error(15);
+ if(dynamic_cast<EE*> ((B*)(D*)&ee)) error(16);
+ if(&ee != dynamic_cast<EE*> ((C*)(D*)&ee)) error(17); //counter example
+ if(&ee != dynamic_cast<EE*> ((B*)(CC*)&ee)) error(18); //counter example
+ if((CC*)&ee != dynamic_cast<CC*> ((B*)(CC*)&ee)) error(19); //counter example
+}
+
+// 1.2.2 one or more branches are nonpublic
+
+struct X : private BB, E {};
+struct Y : AA, private B {};
+
+class XX : BB, E {};
+
+void
+test03 ()
+{
+ X x;
+ if(&x != dynamic_cast<X*>((B*)(CC*)(E*)&x)) error(20); //counter example
+ XX xx;
+ if(dynamic_cast<XX*>((B*)(CC*)(E*)&xx)) error(21);
+ Y y;
+ if(dynamic_cast<Y*>((B*)&y)) error (22);
+ if(dynamic_cast<Y*>((A*)(B*)&y)) error (23);
+}
+
+// 2. crosscast
+
+struct J {virtual ~J(){}};
+struct K : CC, private J {};
+class KK : J, CC{};
+
+void
+test04 ()
+{
+ E e;
+ if(dynamic_cast<CC*> ((B*)(D*)&e)) error(24);
+ if((CC*)&e != dynamic_cast<CC*> ((C*)(D*)&e)) error(25); //counter example
+ K k;
+ if(dynamic_cast<J*> ((B*)&k)) error(26);
+ KK kk;
+ if(dynamic_cast<J*> ((CC*)&kk)) error(27);
+}
+
+int
+main ()
+{
+ test01();
+ test02();
+ test03();
+ test04();
+ return errors ? 1 : 0;
+}