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// { dg-do run }

// Copyright (C) 2002 Free Software Foundation, Inc.

// Contributed by Nathan Sidwell 27 Nov 2002 

// covariant returns. Fixed & virtual offset.

struct B1;

struct B2;

struct D;

struct B1

{

  virtual B1 *foo1 () {return this;}

  virtual B2 *foo2 (D *);

};

struct B2

{

  virtual B2 *baz1 () {return this;}

  virtual B1 *baz2 (D *);

};

struct Pad1 { virtual ~Pad1 (){}};

struct Pad2 { virtual ~Pad2 (){}};

struct Proxy1 : Pad1, B1 {};

struct Proxy2 : Pad2, B2 {};

struct D : virtual Proxy1, virtual Proxy2

{

  virtual D *foo1 () {return this;}

  virtual D *foo2 (D *d) {return d;}

  virtual D *baz1 () {return this;}

  virtual D *baz2 (D *d) {return d;}

};

B2 *B1::foo2 (D *d) {return d;}

B1 *B2::baz2 (D *d) {return d;}

int test (B1 *b1, B2 *b2, D *d)

{

  if (b1->foo1 () != b1)

    return 1;

  if (b2->baz1 () != b2)

    return 2;

  if (b1->foo2 (d) != b2)

    return 3;

  if (b2->baz2 (d) != b1)

    return 4;

  return 0;

}

int test (D *d)

{

  if (d->foo2 (d) != d)

    return 11;

  if (d->baz2 (d) != d)

    return 12;

  if (d->foo1 () != d)

    return 13;

  if (d->baz1 () != d)

    return 14;

  return 0;

}

int main ()

{

  D d;

  int r;

  if ((r = test (&d, &d, &d)))

    return r;

  if ((r = test (&d)))

    return r;

  return 0;

}