Subversion Repositories openrisc_2011-10-31

// { dg-do run  }

// prms-id: 8018

class RefCount {

private:

  int nref;

public:

  RefCount() : nref(0) {}

  ~RefCount() {}

  int nrefs() const { return nref; }

  int reference() {

    nref++;

    return nref;

  }

  int unreference() {

    nref--;

    return nref;

  }

};

class A : public RefCount {

public:

  A() {}

  ~A() {}

};

class RefA {

private:

  A *p;

  void clear() {

    if (p) {

      p->unreference();

      if (!p->nrefs())

        delete p;

    }

  }

public:

  RefA(A* a) : p(a) { if (p) p->reference(); }

  RefA(const RefA& a) : p(a.p) { if (p) p->reference(); }

  ~RefA() { clear(); }

  A* operator->() { return p; }

  RefA& operator=(const RefA& a) {

    clear();

    p=a.p;

    if (p)

      p->reference();

    return *this;

  }

  RefA& operator=(A* a) {

    clear();

    p=a;

    if (p)

      p->reference();

    return *this;

  }

};

class AccRefA {

private:

  RefA a;

public:

  AccRefA(A* ap) : a(ap) {}

  AccRefA(const RefA& ar) : a(ar) {}

  ~AccRefA() {}

  operator RefA&() { return a; }

  RefA& result() { return a; }

};

int

main() {

  RefA a1 = new A;

  AccRefA aa1(a1);

  RefA a3 = aa1;

  if (a1->nrefs() != 3)

    return 1;

}