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// Copyright (C) 2015-2018 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/>.
// { dg-do run { target c++11 } }
#include <memory>
#include <testsuite_hooks.h>
template<typename T, typename U>
bool
share_ownership(const std::shared_ptr<T>& p1, const std::shared_ptr<U>& p2)
{
return !p1.owner_before(p2) && !p2.owner_before(p1);
}
void
test01()
{
struct X : public std::enable_shared_from_this<X> { };
using CX = const X;
std::shared_ptr<CX> p(new CX);
VERIFY( share_ownership(p->shared_from_this(), p) );
p.reset(new X);
VERIFY( share_ownership(p->shared_from_this(), p) );
auto p2 = std::const_pointer_cast<X>(p)->shared_from_this();
VERIFY( share_ownership(p2, p) );
}
void
test02()
{
struct X;
using CX = const X;
struct X : public std::enable_shared_from_this<CX> { };
std::shared_ptr<CX> p(new X);
VERIFY( share_ownership(p->shared_from_this(), p) );
p.reset(new CX);
VERIFY( share_ownership(p->shared_from_this(), p) );
}
int
main()
{
test01();
test02();
}
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