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// { dg-do run  }

// Copyright (C) 2005 Free Software Foundation, Inc.

// Contributed by Nathan Sidwell 11 Feb 2005 

// Origin: bredelin@ucla.edu

// Bug 19891: Incorrect covariant vtables

struct Model {

  bool full_tree;

  virtual Model* clone() const =0;

  virtual const char *name() const =0;

  virtual ~Model() {}

};

struct R: virtual public Model {

  virtual R* clone() const =0;

};

struct A: virtual public Model {

  virtual A* clone() const=0;

};

struct RA: public R, public A {

  virtual RA* clone() const=0;

};

static const char *string = "EQU";

struct EQU: public RA {

  virtual EQU* clone() const {return new EQU(*this);}

  const char *name() const {return string;}

};

int main() {

  Model* M1 = new EQU();

  Model* M2 = M1->clone();

  Model* M3 = M2->clone();

  if (M1->name () != string)

    return 1;

  if (M2->name () != string)

    return 2;

  if (M3->name () != string)

    return 3;

  return 0;

}