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

// Copyright (C) 2008, 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/>.

// 20.8.13.2 Template class shared_ptr [util.smartptr.shared]

#include <memory>

#include <testsuite_hooks.h>

struct A

{

  int i;

  virtual ~A() { }

};

struct B : A

{

};

// 20.6.6.2.5 shared_ptr observers [util.smartptr.shared.obs]

void

test01()

{

  bool test __attribute__((unused)) = true;

  // test empty shared_ptrs compare equivalent

  std::shared_ptr<A> p1;

  std::shared_ptr<B> p2;

  VERIFY( !p1.owner_before(p2) && !p2.owner_before(p1) );

}

// Construction from pointer

void

test02()

{

  bool test __attribute__((unused)) = true;

  std::shared_ptr<A> a0;

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

  VERIFY( a1.owner_before(a0) || a0.owner_before(a1) );

  VERIFY( !(a1.owner_before(a0) && a0.owner_before(a1)) );

  std::shared_ptr<B> b1(new B);

  VERIFY( a1.owner_before(b1) || b1.owner_before(a1) );

  VERIFY( !(a1.owner_before(b1) && b1.owner_before(a1)) );

  std::shared_ptr<A> a2(a1);

  VERIFY( !a1.owner_before(a2) && !a2.owner_before(a1) );

  a2 = b1;

  VERIFY( !b1.owner_before(a2) && !a2.owner_before(b1) );

  std::weak_ptr<A> w1(a1);

  VERIFY( !a1.owner_before(w1) && !w1.owner_before(a1) );

  std::weak_ptr<A> w2(a2);

  VERIFY( !b1.owner_before(w2) && !w2.owner_before(b1) );

}

// Aliasing

void

test03()

{

  bool test __attribute__((unused)) = true;

  std::shared_ptr<A> p1(new A());

  std::shared_ptr<int> p2(p1, &p1->i);

  VERIFY( !p1.owner_before(p2) && !p2.owner_before(p1) );

}

int

main()

{

  test01();

  test02();

  test03();

  return 0;

}