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// { dg-do run  }

// Author: Alfred Miniarik 

// 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 ((A*)&d)) error(1);

  if(dynamic_cast ((B*)&d)) error(2);

  if(&d != dynamic_cast ((C*)&d)) error(3); //counter example

  if(dynamic_cast ((B*)&d)) error(4);

  DD dd;

  if(dynamic_cast ((A*)&dd)) error(5);

  if(dynamic_cast ((B*)&dd)) error(6);

  DDD ddd;

  if(dynamic_cast ((A*)&ddd)) error(7);

  if(dynamic_cast ((B*)&ddd)) error(8);

  if(dynamic_cast ((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 ((A*)(D*)&e)) error(10);

  if(dynamic_cast ((B*)(D*)&e)) error(11);

  if(&e != dynamic_cast ((C*)(D*)&e)) error(12); //counter example

  if(&e != dynamic_cast ((B*)(CC*)&e)) error(13); //counter example

  if((CC*)&e != dynamic_cast ((B*)(CC*)&e)) error(14); //counter example

  EE ee;

  if(dynamic_cast ((A*)(D*)&ee)) error(15);

  if(dynamic_cast ((B*)(D*)&ee)) error(16);

  if(&ee != dynamic_cast ((C*)(D*)&ee)) error(17); //counter example

  if(&ee != dynamic_cast ((B*)(CC*)&ee)) error(18); //counter example

  if((CC*)&ee != dynamic_cast ((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((B*)(CC*)(E*)&x)) error(20); //counter example

  XX xx;

  if(dynamic_cast((B*)(CC*)(E*)&xx)) error(21);

  Y y;

  if(dynamic_cast((B*)&y)) error (22);

  if(dynamic_cast((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 ((B*)(D*)&e)) error(24);

  if((CC*)&e != dynamic_cast ((C*)(D*)&e)) error(25); //counter example

  K k;

  if(dynamic_cast ((B*)&k)) error(26);

  KK kk;

  if(dynamic_cast ((CC*)&kk)) error(27);

}

int

main ()

{

  test01();

  test02();

  test03();

  test04();

  return errors ? 1 : 0;

}