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// { dg-options "-std=gnu++0x" }

// Copyright (C) 2007, 2009 Free Software Foundation

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING3.  If not see

// <http://www.gnu.org/licenses/>.

// 20.6.6.2 Template class shared_ptr [util.smartptr.shared]

#include <memory>

#include <testsuite_hooks.h>

struct A

{

  A() : i() { }

  virtual ~A() { }

  int i;

};

struct B : A

{

  B() : A(), a() { }

  virtual ~B() { }

  A a;

};

void deletefunc(A* p) { delete p; }

// 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const]

// Aliasing constructors

int test01()

{

  bool test __attribute__((unused)) = true;

  std::shared_ptr<A> a;

  std::shared_ptr<bool> b1(a, &test);

  VERIFY( b1.use_count() == 0 );

  VERIFY( a.get() == 0 );

  VERIFY( b1.get() == &test );

  std::shared_ptr<bool> b2(b1);

  VERIFY( b2.use_count() == 0 );

  VERIFY( b1.get() == b2.get() );

  return 0;

}

int

test02()

{

  bool test __attribute__((unused)) = true;

  std::shared_ptr<A> a(new A);

  std::shared_ptr<int> i1(a, &a->i);

  VERIFY( i1.use_count() == 2 );

  std::shared_ptr<int> i2(i1);

  VERIFY( i2.use_count() == 3 );

  VERIFY( i2.get() == &a->i );

  return 0;

}

int

test03()

{

  bool test __attribute__((unused)) = true;

  std::shared_ptr<B> b(new B);

  std::shared_ptr<A> a1(b, b.get());

  std::shared_ptr<A> a2(b, &b->a);

  VERIFY( a2.use_count() == 3 );

  VERIFY( a1 == b );

  VERIFY( a2 != b );

  VERIFY( a1.get() != a2.get() );

  std::shared_ptr<A> a3(a1);

  VERIFY( a3 == b );

  a3 = a2;

  VERIFY( a3.get() == &b->a );

  return 0;

}

int

main()

{

  test01();

  test02();

  test03();

  return 0;

}