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// { dg-do run { target c++11 } }
// Copyright (C) 2008-2022 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/>.
// 20.7.2.2 Class template shared_ptr [util.smartptr.shared]
#include <memory>
#include <testsuite_hooks.h>
struct A { };
int destroyed = 0;
struct B : A { ~B() { ++destroyed; } };
// 20.7.2.2.1 shared_ptr constructors [util.smartptr.shared.const]
// Construction from unique_ptr
template<typename From, typename To>
constexpr bool constructible()
{
using namespace std;
return is_constructible<shared_ptr<To>, unique_ptr<From>>::value
&& is_constructible<shared_ptr<const To>, unique_ptr<From>>::value
&& is_constructible<shared_ptr<const To>, unique_ptr<const From>>::value;
}
static_assert( constructible< A, A >(), "A -> A compatible" );
static_assert( constructible< B, A >(), "B -> A compatible" );
static_assert( constructible< int, int >(), "int -> int compatible" );
static_assert( !constructible< int, long >(), "int -> long not compatible" );
void
test01()
{
std::unique_ptr<A> up(new A);
std::shared_ptr<A> sp(std::move(up));
VERIFY( up.get() == 0 );
VERIFY( sp.get() != 0 );
VERIFY( sp.use_count() == 1 );
}
void
test02()
{
std::unique_ptr<B> b(new B);
std::shared_ptr<A> a(std::move(b));
VERIFY( b.get() == 0 );
VERIFY( a.get() != 0 );
VERIFY( a.use_count() == 1 );
a.reset();
VERIFY( destroyed == 1 );
}
int
main()
{
test01();
test02();
return 0;
}
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