// { dg-do run }
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// { dg-do run }
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// Author: Alfred Miniarik
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// Author: Alfred Miniarik
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// test of dynamic_cast
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// test of dynamic_cast
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// runtime detecting of nonpublic
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// runtime detecting of nonpublic
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// inheritance within a cast
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// inheritance within a cast
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// and therefor failing with result 0.
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// and therefor failing with result 0.
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extern "C" void abort();
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extern "C" void abort();
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extern "C" int printf (const char *, ...);
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extern "C" int printf (const char *, ...);
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static int errors = 0;
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static int errors = 0;
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void error(int i)
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void error(int i)
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{
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{
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printf("Error %i\n",i);
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printf("Error %i\n",i);
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errors++;
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errors++;
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}
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}
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// 1. downcast
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// 1. downcast
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// 1.1. single inheritance case
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// 1.1. single inheritance case
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struct A {virtual ~A(){}};
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struct A {virtual ~A(){}};
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struct AA : A {};
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struct AA : A {};
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struct B : A {};
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struct B : A {};
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struct BB : B {};
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struct BB : B {};
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class C : B {};
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class C : B {};
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struct D : C {};
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struct D : C {};
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struct CC : B {};
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struct CC : B {};
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class DD : CC {};
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class DD : CC {};
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class CCC : protected B {};
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class CCC : protected B {};
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class DDD : protected CCC {};
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class DDD : protected CCC {};
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void
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void
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test01 ()
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test01 ()
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{
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{
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D d;
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D d;
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if(dynamic_cast ((A*)&d)) error(1);
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if(dynamic_cast ((A*)&d)) error(1);
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if(dynamic_cast ((B*)&d)) error(2);
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if(dynamic_cast ((B*)&d)) error(2);
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if(&d != dynamic_cast ((C*)&d)) error(3); //counter example
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if(&d != dynamic_cast ((C*)&d)) error(3); //counter example
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if(dynamic_cast ((B*)&d)) error(4);
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if(dynamic_cast ((B*)&d)) error(4);
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DD dd;
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DD dd;
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if(dynamic_cast ((A*)&dd)) error(5);
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if(dynamic_cast ((A*)&dd)) error(5);
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if(dynamic_cast ((B*)&dd)) error(6);
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if(dynamic_cast ((B*)&dd)) error(6);
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DDD ddd;
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DDD ddd;
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if(dynamic_cast ((A*)&ddd)) error(7);
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if(dynamic_cast ((A*)&ddd)) error(7);
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if(dynamic_cast ((B*)&ddd)) error(8);
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if(dynamic_cast ((B*)&ddd)) error(8);
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if(dynamic_cast ((B*)&ddd)) error(9);
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if(dynamic_cast ((B*)&ddd)) error(9);
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}
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}
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// 1.2. multiple inheritance case
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// 1.2. multiple inheritance case
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// 1.2.1. all bases are public
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// 1.2.1. all bases are public
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struct E : D, CC {};
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struct E : D, CC {};
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struct EE : CC, D {}; //Will search in reverse order.
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struct EE : CC, D {}; //Will search in reverse order.
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void
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void
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test02 ()
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test02 ()
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{
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{
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E e;
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E e;
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if(dynamic_cast ((A*)(D*)&e)) error(10);
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if(dynamic_cast ((A*)(D*)&e)) error(10);
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if(dynamic_cast ((B*)(D*)&e)) error(11);
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if(dynamic_cast ((B*)(D*)&e)) error(11);
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if(&e != dynamic_cast ((C*)(D*)&e)) error(12); //counter example
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if(&e != dynamic_cast ((C*)(D*)&e)) error(12); //counter example
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if(&e != dynamic_cast ((B*)(CC*)&e)) error(13); //counter example
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if(&e != dynamic_cast ((B*)(CC*)&e)) error(13); //counter example
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if((CC*)&e != dynamic_cast ((B*)(CC*)&e)) error(14); //counter example
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if((CC*)&e != dynamic_cast ((B*)(CC*)&e)) error(14); //counter example
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EE ee;
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EE ee;
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if(dynamic_cast ((A*)(D*)&ee)) error(15);
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if(dynamic_cast ((A*)(D*)&ee)) error(15);
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if(dynamic_cast ((B*)(D*)&ee)) error(16);
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if(dynamic_cast ((B*)(D*)&ee)) error(16);
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if(&ee != dynamic_cast ((C*)(D*)&ee)) error(17); //counter example
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if(&ee != dynamic_cast ((C*)(D*)&ee)) error(17); //counter example
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if(&ee != dynamic_cast ((B*)(CC*)&ee)) error(18); //counter example
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if(&ee != dynamic_cast ((B*)(CC*)&ee)) error(18); //counter example
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if((CC*)&ee != dynamic_cast ((B*)(CC*)&ee)) error(19); //counter example
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if((CC*)&ee != dynamic_cast ((B*)(CC*)&ee)) error(19); //counter example
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}
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}
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// 1.2.2 one or more branches are nonpublic
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// 1.2.2 one or more branches are nonpublic
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struct X : private BB, E {};
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struct X : private BB, E {};
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struct Y : AA, private B {};
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struct Y : AA, private B {};
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class XX : BB, E {};
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class XX : BB, E {};
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void
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void
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test03 ()
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test03 ()
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{
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{
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X x;
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X x;
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if(&x != dynamic_cast((B*)(CC*)(E*)&x)) error(20); //counter example
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if(&x != dynamic_cast((B*)(CC*)(E*)&x)) error(20); //counter example
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XX xx;
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XX xx;
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if(dynamic_cast((B*)(CC*)(E*)&xx)) error(21);
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if(dynamic_cast((B*)(CC*)(E*)&xx)) error(21);
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Y y;
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Y y;
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if(dynamic_cast((B*)&y)) error (22);
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if(dynamic_cast((B*)&y)) error (22);
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if(dynamic_cast((A*)(B*)&y)) error (23);
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if(dynamic_cast((A*)(B*)&y)) error (23);
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}
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}
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// 2. crosscast
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// 2. crosscast
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struct J {virtual ~J(){}};
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struct J {virtual ~J(){}};
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struct K : CC, private J {};
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struct K : CC, private J {};
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class KK : J, CC{};
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class KK : J, CC{};
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void
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void
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test04 ()
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test04 ()
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{
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{
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E e;
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E e;
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if(dynamic_cast ((B*)(D*)&e)) error(24);
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if(dynamic_cast ((B*)(D*)&e)) error(24);
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if((CC*)&e != dynamic_cast ((C*)(D*)&e)) error(25); //counter example
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if((CC*)&e != dynamic_cast ((C*)(D*)&e)) error(25); //counter example
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K k;
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K k;
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if(dynamic_cast ((B*)&k)) error(26);
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if(dynamic_cast ((B*)&k)) error(26);
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KK kk;
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KK kk;
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if(dynamic_cast ((CC*)&kk)) error(27);
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if(dynamic_cast ((CC*)&kk)) error(27);
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}
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}
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int
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int
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main ()
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main ()
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{
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{
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test01();
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test01();
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test02();
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test02();
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test03();
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test03();
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test04();
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test04();
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return errors ? 1 : 0;
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return errors ? 1 : 0;
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}
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}
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