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// { dg-do run { target c++11 } }
// { dg-require-effective-target hosted }
// Copyright (C) 2008-2024 Free Software Foundation, Inc.
//
// 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()
{
// 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()
{
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) );
static_assert( noexcept(a1.owner_before(a0)), "" );
static_assert( noexcept(a1.owner_before(b1)), "" );
static_assert( noexcept(b1.owner_before(a1)), "" );
static_assert( noexcept(a1.owner_before(w1)), "" );
static_assert( noexcept(b1.owner_before(w1)), "" );
}
// Aliasing
void
test03()
{
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;
}
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