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// { dg-do run }

// Copyright (C) 2003 Free Software Foundation, Inc.

// Contributed by Nathan Sidwell 12 Dec 2003 

// Origin:  grigory@stl.sarov.ru

// PR c++/13118. Missing covariant thunk.

struct c0 {};

struct c1 : virtual c0 {

  virtual c0* f6();

};

struct c5 {

    virtual void foo();

};

struct c10 : virtual c1 {

    virtual void foo();

};

struct c1a : c1 {}; // disambiguation

struct c11 : virtual c10, c1a {

  int i;

  virtual c1* f6 () = 0;

};

struct c18 : c5, virtual c1 {

    virtual void bar();

};

struct c28 : virtual c0, virtual c11 {

    virtual c18* f6();

};

c0 *c1::f6 () {}

void c5::foo () {}

void c10::foo () {}

void c18::bar () {}

c18 ret;

c18 *c28::f6 ()

{

  return &ret;

}

bool check_c1 (c1 *ptr)

{

  c0 *r = ptr->f6 ();

  return r != &ret;

}

bool check_c10 (c10 *ptr)

{

  c0 *r = ptr->f6 ();

  return r != &ret;

}

bool check_c11 (c11 *ptr)

{

  c1 *r = ptr->f6 ();

  return r != &ret;

}

bool check_c28 (c28 *ptr)

{

  c18 *r = ptr->f6 ();

  return r != &ret;

}

int main ()

{

  c28 obj;

  if (check_c1 (static_cast (&obj)))

    return 1;

  if (check_c1 (static_cast (&obj)))

    return 2;

  if (check_c10 (&obj))

    return 3;

  if (check_c11 (&obj))

    return 4;

  if (check_c28 (&obj))

    return 5;

  return 0;

}